Week12
•
0 likes•54 views
1. The document discusses the history and importance of encryption for protecting data exchanged over the internet. Encryption encodes data in a way that can only be read by the intended recipient. 2. Early encryption methods like the Scytale used cylinders to encrypt messages, while modern methods use complex algorithms and large key sizes, like the AES standard with 256-bit keys, offering trillions of possible combinations. 3. Symmetric key encryption sends the encryption key with the message, but public key encryption addresses this weakness through the use of public and private key pairs to securely transmit encrypted messages.
Report
Share
Report
Share
Download to read offline
Recommended
Week12
Encryption works by using keys to scramble information before it is transmitted. There are two main types of encryption: symmetric and asymmetric.
Symmetric encryption uses the same key to both encrypt and decrypt data. It is like two generals sending coded messages using the same cipher. Computers use long encryption keys for security. Early symmetric algorithms like DES used 56-bit keys, while the current standard AES uses 128-bit, 192-bit or 256-bit keys.
Hashing algorithms are used in public key encryption. A hash takes an input and generates a unique output value using an algorithm. It is very difficult to determine the original input from the hash value alone. Hashes are used to verify data integrity and in digital
A Novel Key Distribution Scheme f or a Visual Crypto System
This document proposes a novel key distribution scheme for visual cryptography. It begins with an introduction to cryptography and visual cryptography. It then describes the existing Diffie-Hellman key exchange algorithm. The proposed method generates a shared secret key through a multi-step process using asymmetric key cryptography and modulus operation on private keys and a public image. Both parties are able to derive the same symmetric key for encrypting future communications without directly transmitting their private keys. The methodology and implementation details are provided, along with experimental results demonstrating the generation of matching keys within 0.11 seconds on average.
Python Assignment 6 Write Up
This document summarizes different approaches to hiding messages in images:
1. Using beginning and ending markers like '@@' to identify the start and end of hidden messages.
2. Encoding the length of the message after the beginning marker. Or using an ending marker to indicate when the message is over.
3. When hiding values that are greater than 255, setting each value in the RGB tuple to the next lowest multiple of 10 (e.g. 145 to 140), or setting values over 255 to 240 first before adding the digit value.
PUBLIC KEY ENCRYPTION
Public key cryptography uses key pairs - a public key and a private key - to encrypt and decrypt messages. The public key can be shared widely, while the private key is kept secret. This allows users to securely share encrypted messages without having to first share secret keys. Common applications of public key cryptography include public key encryption and digital signatures.
Digital Signature
A digital signature is an electronic signature that can authenticate the identity of the sender of a message and ensure that the message has not been altered. Digital signatures are easily transportable, cannot be imitated, and are automatically time-stamped. A digital signature can be used with any message, whether encrypted or not, to verify the sender's identity and that the message was not changed. Digital certificates contain the digital signature of the certificate authority to verify that the certificate is authentic.
Generate an Encryption Key by using Biometric Cryptosystems to secure transfe...
The document describes a proposed method for generating an encryption key from biometric cryptosystems to securely transfer data over a network. It involves extracting minutiae points from a fingerprint scan, generating a cryptographic key from the biometric template, and using an RSA encryption algorithm with the biometric-derived private key. A public key is also calculated based on ridge and furrow patterns in the fingerprint scan. The goal is to uniquely generate encryption keys for each individual using their biometric fingerprint information to add an extra layer of security beyond traditional encryption techniques.
Digital signature
The document discusses digital signatures and related cryptographic concepts. It introduces El Gamal and RSA algorithms for digital signatures, and how they use public/private key pairs to sign and verify messages. It also discusses hashing functions and how they are used to generate digests of messages for signing rather than signing full messages. The Secure Hash Algorithm (SHA) and Digital Signature Algorithm (DSA) are presented as common standards. The properties and process of DSA signature generation and verification are described in detail.
IRJET- Comparative Analysis of Encryption Techniques
The document compares and analyzes different encryption techniques. It summarizes the Data Encryption Standard (DES), Triple DES (3DES), and Advanced Encryption Standard (AES). DES uses a 56-bit key and 64-bit block size, while 3DES extends DES to 168 bits for improved security. AES was developed later to replace DES and uses 128, 192, or 256 bit keys and block sizes. The document concludes that AES is more secure than DES and 3DES based on its longer key lengths and that it is the symmetric encryption algorithm of choice for future applications.
Recommended
Week12
Encryption works by using keys to scramble information before it is transmitted. There are two main types of encryption: symmetric and asymmetric.
Symmetric encryption uses the same key to both encrypt and decrypt data. It is like two generals sending coded messages using the same cipher. Computers use long encryption keys for security. Early symmetric algorithms like DES used 56-bit keys, while the current standard AES uses 128-bit, 192-bit or 256-bit keys.
Hashing algorithms are used in public key encryption. A hash takes an input and generates a unique output value using an algorithm. It is very difficult to determine the original input from the hash value alone. Hashes are used to verify data integrity and in digital
A Novel Key Distribution Scheme f or a Visual Crypto System
This document proposes a novel key distribution scheme for visual cryptography. It begins with an introduction to cryptography and visual cryptography. It then describes the existing Diffie-Hellman key exchange algorithm. The proposed method generates a shared secret key through a multi-step process using asymmetric key cryptography and modulus operation on private keys and a public image. Both parties are able to derive the same symmetric key for encrypting future communications without directly transmitting their private keys. The methodology and implementation details are provided, along with experimental results demonstrating the generation of matching keys within 0.11 seconds on average.
Python Assignment 6 Write Up
This document summarizes different approaches to hiding messages in images:
1. Using beginning and ending markers like '@@' to identify the start and end of hidden messages.
2. Encoding the length of the message after the beginning marker. Or using an ending marker to indicate when the message is over.
3. When hiding values that are greater than 255, setting each value in the RGB tuple to the next lowest multiple of 10 (e.g. 145 to 140), or setting values over 255 to 240 first before adding the digit value.
PUBLIC KEY ENCRYPTION
Public key cryptography uses key pairs - a public key and a private key - to encrypt and decrypt messages. The public key can be shared widely, while the private key is kept secret. This allows users to securely share encrypted messages without having to first share secret keys. Common applications of public key cryptography include public key encryption and digital signatures.
Digital Signature
A digital signature is an electronic signature that can authenticate the identity of the sender of a message and ensure that the message has not been altered. Digital signatures are easily transportable, cannot be imitated, and are automatically time-stamped. A digital signature can be used with any message, whether encrypted or not, to verify the sender's identity and that the message was not changed. Digital certificates contain the digital signature of the certificate authority to verify that the certificate is authentic.
Generate an Encryption Key by using Biometric Cryptosystems to secure transfe...
The document describes a proposed method for generating an encryption key from biometric cryptosystems to securely transfer data over a network. It involves extracting minutiae points from a fingerprint scan, generating a cryptographic key from the biometric template, and using an RSA encryption algorithm with the biometric-derived private key. A public key is also calculated based on ridge and furrow patterns in the fingerprint scan. The goal is to uniquely generate encryption keys for each individual using their biometric fingerprint information to add an extra layer of security beyond traditional encryption techniques.
Digital signature
The document discusses digital signatures and related cryptographic concepts. It introduces El Gamal and RSA algorithms for digital signatures, and how they use public/private key pairs to sign and verify messages. It also discusses hashing functions and how they are used to generate digests of messages for signing rather than signing full messages. The Secure Hash Algorithm (SHA) and Digital Signature Algorithm (DSA) are presented as common standards. The properties and process of DSA signature generation and verification are described in detail.
IRJET- Comparative Analysis of Encryption Techniques
The document compares and analyzes different encryption techniques. It summarizes the Data Encryption Standard (DES), Triple DES (3DES), and Advanced Encryption Standard (AES). DES uses a 56-bit key and 64-bit block size, while 3DES extends DES to 168 bits for improved security. AES was developed later to replace DES and uses 128, 192, or 256 bit keys and block sizes. The document concludes that AES is more secure than DES and 3DES based on its longer key lengths and that it is the symmetric encryption algorithm of choice for future applications.
Authentication: keys, MAC
Authentication protocols allow communicating parties to verify each other's identities before exchanging confidential information. Digital signatures provide a way for senders to cryptographically sign messages in a way that cannot be forged or denied later. There are two main approaches: arbitrated signatures use a trusted third party to verify and time-stamp signatures, while direct signatures encrypt a hash of the message with the sender's private key for verification by the recipient. Key techniques like Diffie-Hellman key exchange, Kerberos, and public key infrastructures help enable secure authentication and signatures at scale.
Public Key Cryptography
This document summarizes public-key cryptography. It discusses how public-key cryptography uses unique public and private keys to encrypt and decrypt messages securely. It describes how public-key encryption allows a sender to encrypt a message with the recipient's public key, while only the recipient's private key can decrypt it. It also explains how digital signatures allow a sender to encrypt a message with their private key for authentication, while the recipient can decrypt it with the sender's public key to verify identity and integrity. The document notes some vulnerabilities of public-key cryptography like longer key sizes and man-in-the-middle attacks, and how certificate authorities help address these issues.
MULTI-STAGE ENCRYPTION USING SEEDED SDES
Now-a-days the usage of internet increases tremendously so, there is a need of security for the data. Cryptography
is a process of scrambling the data into unknown format which provides security to the data. Modern cryptography is mainly based on mathematical theory and computer science practice. Cryptography process is
done with the help of encryption and decryption. The basic two ideas behind the cryptography technique are substitution and transposition. This paper presents a multistage encryption algorithm. At the end of each stage an intermediate cipher is produced. The key is generated by using SEEDED SDES algorithm. Final cipher text is derived from the local binary pattern (LBP).
Iaetsd a layered security approach through femto cell using
This document discusses secure routing and data transfer in mobile ad-hoc networks (MANETs). It proposes using onion routing and node characterization to securely route data through layered intermediate nodes while also sending dummy packets to securely transfer data. Onion routing works by removing intermediate node identifiers in reverse order from destination to source, like peeling layers of an onion. Node characterization identifies malicious nodes that drop or modify packets by adding sequence numbers, random node identifiers, and padding to packets. This approach aims to securely route and transfer data while reducing transmission time compared to establishing separate routes for each transmission.
CGI White Paper - Key Incryption Mechanism
This white paper discusses public key encryption and digital signatures. It begins by defining public key cryptography and explaining how it works using asymmetric key pairs for encryption/decryption and digital signatures. It then discusses how certificates are used to validate identities and keys. Certificates contain a user's public key and identity information, signed by a certificate authority, allowing identities to be verified. The paper also explains how digital signatures, encryption, and certificates are implemented in practice when sending signed and encrypted messages.
An Efficient Key Distribution Scheme for Wireless Sensor Networks using poly...
The document proposes a key distribution scheme for wireless sensor networks based on polynomials. It has the advantages of both probabilistic and deterministic schemes by providing full connectivity like deterministic schemes while also being resilient to node capture like probabilistic schemes. The scheme involves initially distributing symmetric polynomials to nodes. After establishing keys with neighbors, nodes erase their polynomials. To add new nodes, a set of polynomials is given and keys are established by exchanging encrypted values with neighbors. The scheme has low communication and space overhead compared to other approaches.
Cryptography
A brief introduction to Crytography,the various types of crytography and the advantages and disadvantages associated to using the following tyes with some part of the RSA algorithm
New approach in symmetric block cipher security using a new cubical technique
Cryptography is a security technique that must be applied in both communication sides to protect the data during its transmission through the network from all kinds of attack. On the sender side, the original data will be changed into different symbols or shapes by using a known key; this is
called encryption. On the other communication side, the decryption process will be done and the data will be returned to its former shape by using the agreed key. The importance of cryptography is to fulfil the communication security requirements. Real time applications (RTA) are vulnerable for the moment because of their big size. However, some of the current algorithms are not really
appropriate for use with these kinds of information. In this paper, a novel symmetric block cipher cryptography algorithm has been illustrated and discussed. The system uses an 8x8x8 cube, and each cell contains a pair of binary inputs. The cube can provide a huge number of combinations that can produce a very strong algorithm and a long key size. Due to the lightweight and fast technique used in this idea, it is expected to be extremely rapid compared to the majority of current algorithms, such as DES and AES.
Why Should You Pay Attention To Quantum Computing?
Quantum computing, is an exciting and rather unusual field of informatics. Recently I had privilege to participate on The Quantum Panel, as part of the Payments Canada conference, where I shared some of my view with wider audience.
Encryption And Decryption Using AES Algorithm
This is a Presentation On use of AES Algorithm To Encrypt Or Decrypt a Text File. This Algorithm is the latest and better than DES. It is a Networking Presentation. Thank You.
Public Key Cryptosystem
Introduction to Public key Cryptosystems with block diagrams
Reference : Cryptography and Network Security Principles and Practice , Sixth Edition , William Stalling
C3 s
The document discusses combining cryptography and steganography techniques for secure communication. It proposes encrypting a message before hiding it in a digital object like an image file. This provides two layers of security since an extracted hidden message would still be encrypted. The document outlines the cryptography and steganography algorithms to be used, including AES encryption and least significant bit steganography with improvements like randomization and hashing.
Encryption
This document provides an overview of cryptography concepts and algorithms. It discusses symmetric and asymmetric encryption algorithms such as DES, AES, RSA. It also covers hashing algorithms like MD5 and SHA which are used to generate cryptographic checksums of documents. The key ideas are that encryption encodes information, decryption decodes it, symmetric algorithms use the same key for both, and asymmetric algorithms use different public/private keys for encryption and decryption respectively.
Malicious Node Detection Mechanism for Wireless Ad Hoc Network
With the popularity of intelligent electronics which rely on wireless communication in the post-PC era, computing devices have become cheaper, smaller, more mobile and more pervasive in daily lives. Construction of wireless ad hoc network becomes more and more convenient. However, the deployment of sensor nodes in an unattended environment makes the networks vulnerable to a variety of potential attacks. We present a malicious node detection mechanism. In using a monitoring mechanism to detect suspicious behavior, and on the basis of the responses from other monitoring nodes, if the number of suspicious entries concerning a particular node reaches a set threshold, that node is declared malicious. The simulation results show that the time it takes to detect a malicious node is decreased when there are more nodes in the network, and that it provides a fast and efficient way to detect malicious nodes.
Survey of Hybrid Encryption Algorithm for Mobile Communication
This document proposes a hybrid encryption algorithm for securing data transmission in mobile communications. It combines DES and RSA encryption. DES is used for its higher encryption speed, while RSA is used to distribute keys safely. MD5 digital signatures are also used to guarantee data integrity and authentication. The algorithm encrypts data with DES, encrypts the DES key with RSA, and transmits both along with an MD5 signature to provide dual protection with DES and RSA encryption. This achieves security, confidentiality, integrity and non-repudiation for mobile data transmission.
2 IJAERS-JUN-2015-6-RSA and Modified RSA algorithm using C Programming
This document discusses RSA and a modified RSA algorithm implemented using C programming. It provides an overview of the RSA algorithm, including how it uses public and private key cryptography. The modified RSA algorithm is described as being somewhat slower than standard RSA but more secure. The document then goes on to provide details on implementing both RSA and modified RSA algorithms using C programming, including encrypting and decrypting messages with each. Results are shown of encrypting and decrypting plain text messages using both algorithms.
RSA & MD5 algorithm
The document discusses the RSA and MD5 algorithms. It provides an overview of how RSA works, including key generation, encryption, and decryption. It also explains the MD5 hashing algorithm and its use in ensuring data integrity. Both algorithms are commonly used in security and encryption applications.
Inventive Cubic Symmetric Encryption System for Multimedia
Cryptography is a security technique that must be applied in both communication sides to protect
the data during its transmission through the network from all kinds of attack. On the sender
side, the original data will be changed into different symbols or shapes by using a known key;
this is called encryption. On the other communication side, the decryption process will be done
and the data will be returned to its former shape by using the agreed key. The importance of
cryptography is to fulfil the communication security requirements. Real time applications (RTA)
are vulnerable for the moment because of their big size. However, some of the current algorithms
are not really appropriate for use with these kinds of information. In this paper, a novel
symmetric block cipher cryptography algorithm has been illustrated and discussed. The system
uses an 8x8x8 cube, and each cell contains a pair of binary inputs. The cube can provide a huge
number of combinations that can produce a very strong algorithm and a long key size. Due to
the lightweight and fast technique used in this idea, it is expected to be extremely rapid compared
to the majority of current algorithms, such as DES and AES.
[Www.indowebster.com] jeni-intro1-bab02-pengenalan bahasa-java
1. Bab ini menjelaskan latar belakang dan tujuan pembelajaran Java, termasuk sejarah singkat pembuatan bahasa Java dan fitur-fiturnya seperti Java Virtual Machine dan garbage collection.
2. Java dikembangkan untuk berbagai platform dengan menggunakan Java Virtual Machine sehingga kode sumber dapat portabel.
3. Proses pemrograman Java meliputi penulisan kode, kompilasi, dan eksekusi.
Week13
Amazon began as an online bookseller in 1995 operating out of Jeff Bezos' garage in Seattle. It has since expanded to sell a wide variety of products globally through websites serving seven countries. Amazon's technology infrastructure relies heavily on Linux and contains some of the world's largest databases, which power personalized recommendations by tracking users' browsing histories and purchases. It encrypts sensitive personal data like credit card information to protect users' accounts and payments.
The Sky This Week For June 10 to June 19 _ 2016
This document provides a summary of planetary events visible in the night sky from June 10-19. It describes the locations and appearances of planets like Mars, Saturn, and Jupiter each night. Key events include Jupiter appearing with the moon on June 11th, Mars and Saturn visible in the southeast in a triangle with the moon from June 17-18, and the full moon on June 19th. The document aims to help readers find and observe prominent astronomical objects visible in the northern hemisphere night sky during this period.
The Sky This Week for June 24 to July 3 2016
Go on the hunt for Pluto, see a quiet meteor shower, or go on the hunt for
the Big Dipper this week.
By Richard Talcott | Published: Friday, June 24, 2016
More Related Content
What's hot
Authentication: keys, MAC
Authentication protocols allow communicating parties to verify each other's identities before exchanging confidential information. Digital signatures provide a way for senders to cryptographically sign messages in a way that cannot be forged or denied later. There are two main approaches: arbitrated signatures use a trusted third party to verify and time-stamp signatures, while direct signatures encrypt a hash of the message with the sender's private key for verification by the recipient. Key techniques like Diffie-Hellman key exchange, Kerberos, and public key infrastructures help enable secure authentication and signatures at scale.
Public Key Cryptography
This document summarizes public-key cryptography. It discusses how public-key cryptography uses unique public and private keys to encrypt and decrypt messages securely. It describes how public-key encryption allows a sender to encrypt a message with the recipient's public key, while only the recipient's private key can decrypt it. It also explains how digital signatures allow a sender to encrypt a message with their private key for authentication, while the recipient can decrypt it with the sender's public key to verify identity and integrity. The document notes some vulnerabilities of public-key cryptography like longer key sizes and man-in-the-middle attacks, and how certificate authorities help address these issues.
MULTI-STAGE ENCRYPTION USING SEEDED SDES
Now-a-days the usage of internet increases tremendously so, there is a need of security for the data. Cryptography
is a process of scrambling the data into unknown format which provides security to the data. Modern cryptography is mainly based on mathematical theory and computer science practice. Cryptography process is
done with the help of encryption and decryption. The basic two ideas behind the cryptography technique are substitution and transposition. This paper presents a multistage encryption algorithm. At the end of each stage an intermediate cipher is produced. The key is generated by using SEEDED SDES algorithm. Final cipher text is derived from the local binary pattern (LBP).
Iaetsd a layered security approach through femto cell using
This document discusses secure routing and data transfer in mobile ad-hoc networks (MANETs). It proposes using onion routing and node characterization to securely route data through layered intermediate nodes while also sending dummy packets to securely transfer data. Onion routing works by removing intermediate node identifiers in reverse order from destination to source, like peeling layers of an onion. Node characterization identifies malicious nodes that drop or modify packets by adding sequence numbers, random node identifiers, and padding to packets. This approach aims to securely route and transfer data while reducing transmission time compared to establishing separate routes for each transmission.
CGI White Paper - Key Incryption Mechanism
This white paper discusses public key encryption and digital signatures. It begins by defining public key cryptography and explaining how it works using asymmetric key pairs for encryption/decryption and digital signatures. It then discusses how certificates are used to validate identities and keys. Certificates contain a user's public key and identity information, signed by a certificate authority, allowing identities to be verified. The paper also explains how digital signatures, encryption, and certificates are implemented in practice when sending signed and encrypted messages.
An Efficient Key Distribution Scheme for Wireless Sensor Networks using poly...
The document proposes a key distribution scheme for wireless sensor networks based on polynomials. It has the advantages of both probabilistic and deterministic schemes by providing full connectivity like deterministic schemes while also being resilient to node capture like probabilistic schemes. The scheme involves initially distributing symmetric polynomials to nodes. After establishing keys with neighbors, nodes erase their polynomials. To add new nodes, a set of polynomials is given and keys are established by exchanging encrypted values with neighbors. The scheme has low communication and space overhead compared to other approaches.
Cryptography
A brief introduction to Crytography,the various types of crytography and the advantages and disadvantages associated to using the following tyes with some part of the RSA algorithm
New approach in symmetric block cipher security using a new cubical technique
Cryptography is a security technique that must be applied in both communication sides to protect the data during its transmission through the network from all kinds of attack. On the sender side, the original data will be changed into different symbols or shapes by using a known key; this is
called encryption. On the other communication side, the decryption process will be done and the data will be returned to its former shape by using the agreed key. The importance of cryptography is to fulfil the communication security requirements. Real time applications (RTA) are vulnerable for the moment because of their big size. However, some of the current algorithms are not really
appropriate for use with these kinds of information. In this paper, a novel symmetric block cipher cryptography algorithm has been illustrated and discussed. The system uses an 8x8x8 cube, and each cell contains a pair of binary inputs. The cube can provide a huge number of combinations that can produce a very strong algorithm and a long key size. Due to the lightweight and fast technique used in this idea, it is expected to be extremely rapid compared to the majority of current algorithms, such as DES and AES.
Why Should You Pay Attention To Quantum Computing?
Quantum computing, is an exciting and rather unusual field of informatics. Recently I had privilege to participate on The Quantum Panel, as part of the Payments Canada conference, where I shared some of my view with wider audience.
Encryption And Decryption Using AES Algorithm
This is a Presentation On use of AES Algorithm To Encrypt Or Decrypt a Text File. This Algorithm is the latest and better than DES. It is a Networking Presentation. Thank You.
Public Key Cryptosystem
Introduction to Public key Cryptosystems with block diagrams
Reference : Cryptography and Network Security Principles and Practice , Sixth Edition , William Stalling
C3 s
The document discusses combining cryptography and steganography techniques for secure communication. It proposes encrypting a message before hiding it in a digital object like an image file. This provides two layers of security since an extracted hidden message would still be encrypted. The document outlines the cryptography and steganography algorithms to be used, including AES encryption and least significant bit steganography with improvements like randomization and hashing.
Encryption
This document provides an overview of cryptography concepts and algorithms. It discusses symmetric and asymmetric encryption algorithms such as DES, AES, RSA. It also covers hashing algorithms like MD5 and SHA which are used to generate cryptographic checksums of documents. The key ideas are that encryption encodes information, decryption decodes it, symmetric algorithms use the same key for both, and asymmetric algorithms use different public/private keys for encryption and decryption respectively.
Malicious Node Detection Mechanism for Wireless Ad Hoc Network
With the popularity of intelligent electronics which rely on wireless communication in the post-PC era, computing devices have become cheaper, smaller, more mobile and more pervasive in daily lives. Construction of wireless ad hoc network becomes more and more convenient. However, the deployment of sensor nodes in an unattended environment makes the networks vulnerable to a variety of potential attacks. We present a malicious node detection mechanism. In using a monitoring mechanism to detect suspicious behavior, and on the basis of the responses from other monitoring nodes, if the number of suspicious entries concerning a particular node reaches a set threshold, that node is declared malicious. The simulation results show that the time it takes to detect a malicious node is decreased when there are more nodes in the network, and that it provides a fast and efficient way to detect malicious nodes.
Survey of Hybrid Encryption Algorithm for Mobile Communication
This document proposes a hybrid encryption algorithm for securing data transmission in mobile communications. It combines DES and RSA encryption. DES is used for its higher encryption speed, while RSA is used to distribute keys safely. MD5 digital signatures are also used to guarantee data integrity and authentication. The algorithm encrypts data with DES, encrypts the DES key with RSA, and transmits both along with an MD5 signature to provide dual protection with DES and RSA encryption. This achieves security, confidentiality, integrity and non-repudiation for mobile data transmission.
2 IJAERS-JUN-2015-6-RSA and Modified RSA algorithm using C Programming
This document discusses RSA and a modified RSA algorithm implemented using C programming. It provides an overview of the RSA algorithm, including how it uses public and private key cryptography. The modified RSA algorithm is described as being somewhat slower than standard RSA but more secure. The document then goes on to provide details on implementing both RSA and modified RSA algorithms using C programming, including encrypting and decrypting messages with each. Results are shown of encrypting and decrypting plain text messages using both algorithms.
RSA & MD5 algorithm
The document discusses the RSA and MD5 algorithms. It provides an overview of how RSA works, including key generation, encryption, and decryption. It also explains the MD5 hashing algorithm and its use in ensuring data integrity. Both algorithms are commonly used in security and encryption applications.
Inventive Cubic Symmetric Encryption System for Multimedia
Cryptography is a security technique that must be applied in both communication sides to protect
the data during its transmission through the network from all kinds of attack. On the sender
side, the original data will be changed into different symbols or shapes by using a known key;
this is called encryption. On the other communication side, the decryption process will be done
and the data will be returned to its former shape by using the agreed key. The importance of
cryptography is to fulfil the communication security requirements. Real time applications (RTA)
are vulnerable for the moment because of their big size. However, some of the current algorithms
are not really appropriate for use with these kinds of information. In this paper, a novel
symmetric block cipher cryptography algorithm has been illustrated and discussed. The system
uses an 8x8x8 cube, and each cell contains a pair of binary inputs. The cube can provide a huge
number of combinations that can produce a very strong algorithm and a long key size. Due to
the lightweight and fast technique used in this idea, it is expected to be extremely rapid compared
to the majority of current algorithms, such as DES and AES.
What's hot (18)
Iaetsd a layered security approach through femto cell using
Iaetsd a layered security approach through femto cell using
An Efficient Key Distribution Scheme for Wireless Sensor Networks using poly...
An Efficient Key Distribution Scheme for Wireless Sensor Networks using poly...
New approach in symmetric block cipher security using a new cubical technique
New approach in symmetric block cipher security using a new cubical technique
Why Should You Pay Attention To Quantum Computing?
Why Should You Pay Attention To Quantum Computing?
Malicious Node Detection Mechanism for Wireless Ad Hoc Network
Malicious Node Detection Mechanism for Wireless Ad Hoc Network
Survey of Hybrid Encryption Algorithm for Mobile Communication
Survey of Hybrid Encryption Algorithm for Mobile Communication
2 IJAERS-JUN-2015-6-RSA and Modified RSA algorithm using C Programming
2 IJAERS-JUN-2015-6-RSA and Modified RSA algorithm using C Programming
Inventive Cubic Symmetric Encryption System for Multimedia
Inventive Cubic Symmetric Encryption System for Multimedia
Viewers also liked
[Www.indowebster.com] jeni-intro1-bab02-pengenalan bahasa-java
1. Bab ini menjelaskan latar belakang dan tujuan pembelajaran Java, termasuk sejarah singkat pembuatan bahasa Java dan fitur-fiturnya seperti Java Virtual Machine dan garbage collection.
2. Java dikembangkan untuk berbagai platform dengan menggunakan Java Virtual Machine sehingga kode sumber dapat portabel.
3. Proses pemrograman Java meliputi penulisan kode, kompilasi, dan eksekusi.
Week13
Amazon began as an online bookseller in 1995 operating out of Jeff Bezos' garage in Seattle. It has since expanded to sell a wide variety of products globally through websites serving seven countries. Amazon's technology infrastructure relies heavily on Linux and contains some of the world's largest databases, which power personalized recommendations by tracking users' browsing histories and purchases. It encrypts sensitive personal data like credit card information to protect users' accounts and payments.
The Sky This Week For June 10 to June 19 _ 2016
This document provides a summary of planetary events visible in the night sky from June 10-19. It describes the locations and appearances of planets like Mars, Saturn, and Jupiter each night. Key events include Jupiter appearing with the moon on June 11th, Mars and Saturn visible in the southeast in a triangle with the moon from June 17-18, and the full moon on June 19th. The document aims to help readers find and observe prominent astronomical objects visible in the northern hemisphere night sky during this period.
The Sky This Week for June 24 to July 3 2016
Go on the hunt for Pluto, see a quiet meteor shower, or go on the hunt for
the Big Dipper this week.
By Richard Talcott | Published: Friday, June 24, 2016
Mars closest to earth on may 30, 2016
On May 30, 2016, Mars will be closer to Earth than it has been since 2005, reaching a distance of 46.8 million miles. This is Mars' closest approach for the year, even though Earth passed between Mars and the sun (opposition) on May 22. This is because the orbits of Earth and Mars are elliptical rather than perfectly circular, and Earth orbits the sun faster than Mars. Mars will therefore continue to move closer to the sun between May 22 and May 30, decreasing its distance from Earth.
Week13
Amazon began as an online bookseller in 1995 operating out of Jeff Bezos' garage in Seattle. It has since expanded to sell a wide variety of products globally through websites serving seven countries. Amazon's technology infrastructure relies heavily on Linux and contains some of the world's largest databases, which power personalized recommendations by tracking customers' browsing and purchase histories. It encrypts sensitive personal data like credit card information to protect users' accounts and payments.
Resumen de la Charla: ÉTICA E IDONEIDAD CIENTÍFICA EN CLAIR CAMERON PATTERSON...
Resumen de la Charla: ÉTICA E IDONEIDAD CIENTÍFICA EN CLAIR CAMERON PATTERSON...SOCIEDAD JULIO GARAVITO
Este es el resumen de la próxima charla del Ingeniero Carlos Eduardo Sierra en el mes de Junio, Profesor Asociado de la Universidad Nacional y miembro de la Sociedad Julio Garavito Armero para el Estudio de la AstronomíaFall 2010 - final powerpoint -- shared understandings and communities of pra...
Negotiating a shared understanding of critical literacy among teachers has proven challenging, even for a group that is highly motivated like a graduate course. Building consensus on how to apply critical literacy in one's own school is even harder when motivation and ability vary greatly among teachers. As emerging teacher leaders, candidates in a Master's program should initiate respectful conversations about critical literacy to develop a collaborative community, without demanding compliance that could threaten others. The ideal is to thoughtfully balance advocacy, openness to different views, and maintaining collegial relationships, in the same spirit that critical literacy is practiced with students.
Girlie
Girlie, a stray dog, passed away in December 2010 after living 17-18 years. She had been abused and sick but found a loving home. The document describes the Rainbow Bridge, a place where pets go after death to run and play in fields until they are reunited with their special humans. Girlie is now at the Rainbow Bridge waiting to see her loved ones again after crossing together never to be parted.
Alan Stern: What We Found at Pluto By: Alan Stern | July 31, 2015
New Horizons made several discoveries about Pluto and its moons during its July 2015 flyby. Regarding Pluto, it was found to have a diverse geological landscape with mountains, glaciers, and evidence of subsurface liquids. Pluto was also found to be larger and less dense than previously thought. Its atmosphere was discovered to have widespread hazes and new molecular species. Regarding Charon, it showed a more complex geology than expected, with tectonic ridges, mountains, and a dark red polar region. The flyby also provided initial observations of Pluto's smaller moons Nix and Hydra.
Longitud dava sobel
Para quienes gusten leer el fascinante libro de Dava Sobel sobre John Harrison pueden descargarlo desde
http://www.librosmaravillosos.com/longitud/pdf/Longitud%20-%20Dava%20Sobel.pdf
Action comedy
The document discusses genre theory and the action comedy genre in film. It defines genre as a category or type of text based on structural, thematic or functional criteria. Action comedy films blend comedy and action, with storylines secondary to physical comedy and action scenes featuring heroic leads. Examples given are Rush Hour 3, Taxi, and Men in Black.
Apartes de la charla: Resultados del Tránsito de Mercurio en Frente del Sol...
Apartes de la charla: Resultados del Tránsito de Mercurio en Frente del Sol...SOCIEDAD JULIO GARAVITO
Apreciados Amigos de la Sociedad Julio Garavito, de la Astronomía y de las Ciencias Espaciales en general.
Reciban un cordial saludo.
El sábado 9 de Julio de 2016 desde las 11:00 Am hasta las 1:00 PM. se tuvo la reunión de la Sociedad Julio Garavito en el Auditorio del Planetario de Medellín "Jesús Emilio Ramírez González-Antioquia-Colombia con la Charla: RESULTADOS DEL TRANSITO DE MERCURIO- MAYO 09 DE 2016"
POR: LUIS FERNANDO OCAMPO.
Obeservatorio ITM
Sociedad Antioqueña de Astronomía
Sociedad Julio Garavito
Resumen:
http://www.slideshare.net/SociedadJulioGaravito/invitacin-a-la-charla-resultados-del-transito-de-mercurio-en-frente-del-sol-el-9-de-mayo-de-2016
Aclaración: En los primeros 7 minutos 50 segundos del Video (1/1); tenemos la intervención del Señor Gonzalo Echeverry donde invita a la Sociedad Julio Garavito Armero para el Estudio de la Astronomía a ser partícipe del Proyecto: Remodelación y Adecuación del CASA EGIPCIA del Barrio Prado Centro.
Nota: Estas charlas promovidas por la Sociedad Julio Garavito son de entrada libre sin costo alguno.
La Sociedad Julio Garavito agradece a los Directivos del Parque Explora por permitirle realizar sus reuniones quincenales que han sido tradicionales por más de 40 años en un lugar que se ha convertido en un referente de Ciencia, Ingeniería, Tecnología e Industria AeroEspacial en la Ciudad de Medellín.
Por la atención prestada, muchas gracias.
Sinceramente:
Campo Elías Roldán.
Director Sociedad Julio Garavito para el Estudio de la Astronomía
Medellín-Antioquia
COLOMBIA.
campoelias.roldan@gmail.com
3158094336
https://www.youtube.com/watch?v=fP8SSLwN52Q
https://www.youtube.com/watch?v=hN7Te7yW64Q
https://www.youtube.com/watch?v=KBOb7FNzDJk
https://www.youtube.com/watch?v=8JejQVrNEVk
Sir Roldán
Champs Elysee
Clair C. Patterson (1922-1995) INTERVIEWED BY SHIRLEY K. COHEN March 5, 6 and...
Clair C. Patterson (1922-1995) INTERVIEWED BY SHIRLEY K. COHEN March 5, 6 and...SOCIEDAD JULIO GARAVITO
Una entrevista hecha a Clair Cameron Patterson poco tiempo antes de su muerte, un texto llamativo para que la gente de la SJG lo conozca y pueda leerlo previo a la conferencia correspondiente.
Un saludo cordial. Carlos Eduardo Sierra CProgramación ASASAC Planetario de Bogotá_ Agosto 2016
Invitación a disfrutar de nuestra programación mensual de actividades de divulgación sabatinas de ASASAC, para el mes de agosto de 2016, en el auditorio del Planetario de Bogotá
Viewers also liked (15)
[Www.indowebster.com] jeni-intro1-bab02-pengenalan bahasa-java
[Www.indowebster.com] jeni-intro1-bab02-pengenalan bahasa-java
Resumen de la Charla: ÉTICA E IDONEIDAD CIENTÍFICA EN CLAIR CAMERON PATTERSON...
Resumen de la Charla: ÉTICA E IDONEIDAD CIENTÍFICA EN CLAIR CAMERON PATTERSON...
Fall 2010 - final powerpoint -- shared understandings and communities of pra...
Fall 2010 - final powerpoint -- shared understandings and communities of pra...
Alan Stern: What We Found at Pluto By: Alan Stern | July 31, 2015
Alan Stern: What We Found at Pluto By: Alan Stern | July 31, 2015
Apartes de la charla: Resultados del Tránsito de Mercurio en Frente del Sol...
Apartes de la charla: Resultados del Tránsito de Mercurio en Frente del Sol...
Clair C. Patterson (1922-1995) INTERVIEWED BY SHIRLEY K. COHEN March 5, 6 and...
Clair C. Patterson (1922-1995) INTERVIEWED BY SHIRLEY K. COHEN March 5, 6 and...
Programación ASASAC Planetario de Bogotá_ Agosto 2016
Programación ASASAC Planetario de Bogotá_ Agosto 2016
Similar to Week12
Homework1
Encryption works by using keys to scramble data so it can only be read by the intended recipient. There are two main types of encryption: symmetric key encryption which uses the same key to encrypt and decrypt by both parties, and public key encryption which uses two different keys, a private key known only to the recipient and a public key to encrypt data. Examples of encryption in use include the ancient Spartans using wooden cylinders to encrypt messages and websites using SSL/TLS protocols that replace "http" with "https" and display a padlock icon to show an encrypted secure connection.
無題 1
This document discusses different types of encryption methods. It explains symmetric key encryption where both parties share the same key. It also describes public key encryption where each user has a public and private key. Finally, it discusses hashing algorithms which create unique codes from data but cannot be used to derive the original data.
Network security notes
The document provides an introduction to cryptography. It discusses how Sheela and Tom used public-key cryptography to securely communicate. Tom encrypted a message with Sheela's public key. Sheela then decrypted it with her private key. Tom also sent a digital signature by encrypting a message digest with his private key and encrypting the original message with Sheela's public key. Sheela was able to verify the integrity and authenticity of the message by decrypting the digest with Tom's public key and comparing it to the digest she calculated from the original message. The document goes on to provide more details about symmetric and public key cryptography.
Information Security
The key to information security is protecting information and information systems from unauthorized access through various means. Some common methods of securing information include encryption, authentication, passwords, digital signatures, and controlling access. Public key encryption uses a private and public key system where the private key is known only to the user and the public key can be shared more widely. Encryption scrambles data using an algorithm and key to make it unreadable without the proper key.
Week12
Encryption works by encoding information in such a way that only those with the key can decode it. There are two main types: symmetric-key encryption where both parties have the same key, and public-key encryption where each party has a public and private key. Popular encryption standards and protocols include AES, SSL/TLS, and algorithms like DES which use varying length encryption keys to encrypt data for transmission.
How encryption works
Encryption : the process of converting information or data into a code, especially to prevent unauthorized access.
Week 12 slide
Encryption works by using keys to scramble data so that it can only be unscrambled by those with the correct key. There are two main types: symmetric key encryption which uses the same key to encrypt and decrypt but requires secure distribution of keys, and public key encryption which uses separate public and private keys allowing encryption by anyone but decryption only by the private key holder. Popular implementations of public key encryption include SSL and TLS which enable secure internet communications.
Week 12 slide
Encryption works by using keys to scramble data so that it can only be unscrambled by those with the correct key. There are two main types: symmetric key encryption which uses the same key to encrypt and decrypt but requires secure distribution of keys, and public key encryption which uses separate public and private keys allowing secure communication without pre-sharing keys. Popular implementations of public key encryption include SSL and TLS which power secure internet connections using digital certificates to verify identities.
128 BIT WHAT?
Your data is encrypted. So what? Are you using SSL, AES, 3DES, or something else? Can your data be compromised with a cryptographic attack? What key length are you using? This paper attempts to shed a bit of light on the myths and misconceptions when dealing with encryption.
Analysis of Cryptographic Algorithms for Network Security
This document discusses and analyzes various cryptographic algorithms used for network security. It begins with definitions of key cryptographic terms like plain text, cipher text, encryption, decryption, and keys. It then describes different types of cryptographic schemes, including symmetric, asymmetric, and hash functions. Specific algorithms are analyzed like DES, AES, RSA, and Diffie-Hellman. Factors to consider when selecting a cryptographic algorithm like speed, memory requirements, security needs, and data type are also discussed. Overall the document provides a comprehensive overview and comparison of cryptographic algorithms and their applications for network security.
Cryptographic Tunneling and the OSI ModelWrite a paper consisting .docx
Cryptographic Tunneling and the OSI Model
Write a paper consisting of 500-1,000 words (double-spaced) on the security effects of cryptographic tunneling based on an understanding of the OSI (Open Systems Interconnect) model (Review the OSI Simulation in the Week 3 Lecture).
Provide input on the type of cryptographic tunneling protocols (e.g., L2TP, IPSEC, SSL, etc.) that may be used, the layer(s) of the OSI at which each operates, and also recommend how they may be implemented. Cryptographic tunneling is inherent in building any common virtual private network (VPN).
This is the lecture material that was provided.
Cryptography and Telecommunications
Cryptography
|
Telecommunications and Firewalls
Cryptography
Back to Top
The History of Cryptography
It must be that as soon as a culture has reached a certain level, probably measured largely by its literacy, cryptography appears spontaneously--as its parents, language, and writing probably also did. The multiple human needs and desires that demand privacy among two or more people in the midst of social life must inevitably lead to cryptology wherever men thrive and wherever they write (Kahn, 1996, p. 84).
Kahn, D.
The codebreakers: The comprehensive history of secret communication from ancient times to the internet
. New York, NY: Scribner.
Cryptography:
Cryptography is a discipline that embodies principles and methods for the transformation of data to hide its meaning, establish its authenticity; and prevent its undetected modification, repudiation, and unauthorized use. Cryptography is an old art. We know that the ancient Egyptians were using cryptographic techniques in 1900 B.C. The oldest known example is on the tomb of the Egyptian nobleman Khnumhotep II. For more of this history, you might find a tour of the National Security Agency's National Cryptologic Museum interesting, but this is not required for this class. The National Cryptologic Museum tour can be accessed at the following link:
National Cryptologic Museum
Forms of cryptography:
There are two basic forms of cryptography:
secret-key cryptography
and
public-key cryptography
. These forms of cryptography are different because they use
cryptographic keys
in different ways.
Secret-key cryptography:
Secret key cryptography is the original form of cryptography. Let us deal with text at this point, and think of text as a string of characters. An understandable string of characters is called a
plaintext
. If we have a plaintext and we want to hide its meaning, there are basically two things we can do: We can rearrange the letters in the plaintext, or we can substitute the letters in the plaintext with other letters. These are the two forms of
secret writing
. They are called
transposition
and
substitution
methods, respectively. The text that results from encryption, which is the application of cryptography, is called the
ciphertext
.
Type of Cryptography
Plaintext
Method
Ciphertext
Transposition
cryptography
rea.
Data encryption
Encryption is a technique for transforming information on a computer in such a way that it becomes not understandable.
Secret-Key-Cryptography-ppt-by-alljobs.co_.in_.pptx
Shsndjd xhxjsnss zjznsb. zjz S sknsjsbsszhzuzns jssjehs isbshs jsjsbsshshs. Nsjsns js.sisbe,jsisbsnksnsbshsjshshsshshshsbsbshsbdjnznd.ks sisvshshs. Ksooeye d7s d skksn dhsbsbs mlsjsvshhsbbsbshhbdhhshshshhbskka., sjjwjsjs. Zjshs.ksisbsns,sjwiwbejsjKan.jsjs. jsbsbsks.jsbsnjiaisbdkd.bshsjsbsis,iusiwkgbsns.hsjsbsksksnsjzbskdbdjs.nszgjsnsmsks,jsoenxjee.
Week12 b
Computer encryption uses cryptography to securely transmit sensitive information over the internet. There are two main types of encryption: symmetric key encryption where both computers share the same secret key, and public key encryption which addresses weaknesses of symmetric key by allowing users to communicate securely without pre-sharing a key. Popular implementations of public key encryption include Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols used to transmit encrypted web traffic. Hashing algorithms also play a key role in public key encryption by generating unique hash values from data that cannot be reversed without the original input, improving security.
Advanced cryptography and implementation
The document discusses a technical presentation on advanced cryptography and its implementation. It provides an overview of cryptography, including its history and basic concepts such as encryption, decryption, and cryptanalysis. Examples of cryptography applications discussed include ATM cards, credit cards, e-mail, and lottery tickets.
Cryptography
Cryptography is used to securely communicate private information and can be implemented using secret codes, ciphers, one-time pads, and cryptographic methods like symmetric and asymmetric encryption. Pretty Good Privacy (PGP) is an encryption package that uses asymmetric encryption with two keys - a private key and a public key. A message encrypted with the public key can only be decrypted with the corresponding private key, allowing secure communication between parties. PGP first compresses, encrypts with a randomly generated session key, and then encrypts the session key with the recipient's public key to securely transmit an encrypted message.
Week12
Encryption systems are important for protecting sensitive information that is transmitted online, such as credit card numbers, social security numbers, private messages, and company secrets. The document introduces symmetric-key encryption, where both parties have the same secret key, and public-key encryption, which uses a public and private key pair to securely communicate. It describes how secure sockets layer (SSL) is used to encrypt web traffic and ensure sensitive information is protected when browsing or conducting financial transactions online. Hashing algorithms are also introduced as a way to securely generate keys for public-key encryption systems.
Crypto
• What is cryptography?
• Why it’s helpful in a network and how hackers broke security?
• Different methods of encryption and decryption?
aacyberessential3cryptography-131067585699078884.pptx
This document provides an introduction to symmetric and asymmetric cryptography. Symmetric cryptography uses the same key for encryption and decryption, while asymmetric cryptography uses public and private key pairs. Symmetric cryptography is faster but requires secure key exchange, while asymmetric cryptography allows secure communication between parties who have not previously shared a key. Examples of symmetric algorithms discussed include AES and DES, while asymmetric or public key cryptography is illustrated using Diffie-Hellman key exchange. Both types are still widely used with increasingly large key sizes providing greater security.
S&Wweek12
Encryption is used to secure information transmitted online. It works by encoding information using a key so that only someone with the key can decode it. There are two main types of encryption: symmetric-key encryption which uses the same key to encrypt and decrypt, and asymmetric or public-key encryption which uses two different but linked keys, a private key and a public key. Public-key encryption involves encrypting a symmetric key with the recipient's public key and then encrypting the message with the symmetric key. A popular implementation of public-key encryption is Secure Sockets Layer (SSL) which transmits sensitive information securely over the internet.
Similar to Week12 (20)
Analysis of Cryptographic Algorithms for Network Security
Analysis of Cryptographic Algorithms for Network Security
Cryptographic Tunneling and the OSI ModelWrite a paper consisting .docx
Cryptographic Tunneling and the OSI ModelWrite a paper consisting .docx
Secret-Key-Cryptography-ppt-by-alljobs.co_.in_.pptx
Secret-Key-Cryptography-ppt-by-alljobs.co_.in_.pptx
aacyberessential3cryptography-131067585699078884.pptx
aacyberessential3cryptography-131067585699078884.pptx
Week12
- 2. It has become possible to use internet when we are at home or in our office in recent years. When we use internet, we get a lot of information and send our personal data such as our secret password and Email addresses. If the protocol was a one-to-one information exchange, there is possibility that the information is tapped by the outsider. Once our personal data is leaked, there is no end to the loss. For this reason, we have to hide our data protocol. However, if we hide the data completely and refrain from sending it, we may not use internet forever. Therefore, data coding system which outsider can’t see the true data stream has been needed. This is what we call Encryption.
- 3. Encryption is important for data exchange which use computer, but the main idea has already exist since the time when computers were not popular. Scytale is a good example. This is a thin cylinder made out of wood. The use of this tool is… Scytale 1. Wrap a piece of parchment around the scytale. 2. Write his message along its length. 3. Removed the paper from the cylinder. 4. Wrap the paper around other cylinder. In case of same size cylinder You can read sender’s massage In case of different size cylinder You will read meaningless enumeration of alphabet
- 4. If you send a message “JGNNQ” to your friend, both he and outsider can’t understand its mean. However, if your friend has already known how to code your message, he can read it. In this case, “Shift by 2” is a symmetric key. Shift alphabet by 2 JGNNQ HELLO This is a simple example. In fact, the coding key like “Shift by 2” is easy to crack. Therefore, computers have been adopted more complex coding system. For example, Data Encryption Standard (DES), approved for use in the 1970s uses a 56-bit key. It offers more than 70 quadrillion possible combinations. In case of Advanced Encryption Standard (AES), which uses 128-, 192- or 256-bit keys, it can have more than 300,000,000,000,000,000,000,000,000,000,000,000 key combinations.
- 5. I think you would understand the complexity of encryption which uses symmetric key, but it has a weak point for security aspect. It is sending your Symmetric Key directly before you send your coded text. At this time, if symmetric key leaked to outsider, the encryption will be a meaningless action because they know how to solve your coded message. Public key encryption clears this problem by using public key and secret key. First, you exhibit your public key to sender. Don't worry. Public key isn't direct clue on sender's message. Second, sender makes coded text by using his secret key which made from your public key. After that, he sends the text to you. Finally, you use your secret key and decrypt text. As a result, Public key encryption system is safer to exchange data than Symmetric Key encryption.
- 6. Secure Sockets Layer (SSL) is one of the popular tools which help public-key encryption. You might use it at the scene where you use PayPal or Google Checkout. While you are using SSL, the word "https" appears browser's address bar like this picture. Look at the browser's address bar, the word "https" is appearing Then, the browser uses the public key and encrypts data. Another symbol which appears while you are using SSL/TLS Transport Layer Security (TLS) is more safe protocol. It has been replaced SSL as a most popular way to encryption.