Cryptography
•Download as PPTX, PDF•
2 likes•2,399 views
This document provides an overview of cryptography. It begins by defining cryptography as the science of encrypting and decrypting written communications. It then discusses the history of cryptography dating back to ancient Egypt and the Spartans. The document outlines some common cryptosystem services like confidentiality, integrity, and authentication. It also discusses key concepts like keyspace, symmetric and asymmetric encryption algorithms like AES and RSA, and hybrid encryption approaches. The presentation concludes by thanking the audience and offering to answer any questions.
Report
Share
Report
Share
Recommended
Cryptography
This document discusses the science of encryption through three main topics: the purpose and history of cryptography, modern cryptography techniques, and password security. It describes cryptography as the science of secure communications and its goals of authentication, privacy, integrity, and non-repudiation. The history of cryptography is divided into ancient uses and electro-mechanical machines of World War II. Modern techniques discussed are secret key cryptography, hash functions, and public key cryptography. It emphasizes the importance of strong, unique passwords for security.
Cryptography
Today in modern era of internet we share some sensitive data to information transmission. but need to ensure security. So we focus on Cryptography modern technique for secure transmission of information over network.
Overview of cryptography
This document provides an overview of cryptography. It discusses that cryptography is the practice of secure communication in the presence of others. The purpose of cryptography is to defend against hackers and industrial espionage while securing e-commerce, bank accounts, intellectual property, and avoiding liability. Cryptography provides authentication, privacy, integrity, and non-repudiation. Encryption converts plain text to cipher text using a key while decryption converts cipher text to plain text. Common cryptographic algorithms are secret key cryptography, public key cryptography, and hash functions. Secret key cryptography uses a private key for encryption while public key cryptography uses a public key exchanged over an insecure channel. Hash functions produce a checksum of data. AES encryption is now commonly used and
Cryptography and Network Security
This document provides an overview of cryptography. It begins with a brief history of cryptography from ancient times to modern computer cryptography. It then defines basic concepts like encryption, decryption, plaintext and ciphertext. It describes different types of cryptography including codes, ciphers, steganography and computer ciphers. It also discusses cryptanalysis, security mechanisms like encryption, digital signatures and hash algorithms. It concludes by explaining applications of cryptography in daily life like emails and secured communication between family members.
Cryptography and E-Commerce
The document discusses the history and concepts of cryptography, especially in the context of e-commerce. It explains how cryptography evolved from ancient times to modern applications. Symmetric and asymmetric encryption methods are described, including how public/private key pairs work. Digital signatures are introduced as a way to provide authentication, integrity, and non-repudiation for electronic transactions.
Cryptography
Cryptography is the art and science of securing communication and information by encoding messages so that they are unintelligible to unauthorized parties. It involves techniques for encrypting and decrypting messages to ensure confidentiality, authentication, and integrity. The document defines key terminology related to cryptography such as encryption, decryption, plaintext, ciphertext, and cryptanalysis. It also discusses different types of cryptographic techniques including symmetric and asymmetric encryption as well as cryptographic applications and characteristics.
Basic Cryptography unit 4 CSS
The document discusses various topics related to public key cryptography including:
1) Public key cryptography uses key pairs (public/private keys) to encrypt and decrypt messages securely. Private keys are kept secret while public keys can be openly distributed.
2) RSA is a commonly used public key cryptosystem that uses large prime numbers to encrypt data. It is considered secure if a large enough key is used.
3) Digital signatures authenticate messages by encrypting a hash of the message with the sender's private key, allowing verification with their public key.
Cryptography ppt
This document discusses cryptography, which is the science of secure communication. It covers the basics of cryptography including its objectives, components, terminology, types, and advantages. Specifically, it explains how cryptography ensures confidentiality, integrity, and authentication of information. It also discusses symmetric and asymmetric encryption methods. Symmetric encryption uses a shared key for encryption and decryption while asymmetric encryption uses public and private key pairs. The document highlights how cryptography provides secure communication methods and is important for both military and everyday applications.
Recommended
Cryptography
This document discusses the science of encryption through three main topics: the purpose and history of cryptography, modern cryptography techniques, and password security. It describes cryptography as the science of secure communications and its goals of authentication, privacy, integrity, and non-repudiation. The history of cryptography is divided into ancient uses and electro-mechanical machines of World War II. Modern techniques discussed are secret key cryptography, hash functions, and public key cryptography. It emphasizes the importance of strong, unique passwords for security.
Cryptography
Today in modern era of internet we share some sensitive data to information transmission. but need to ensure security. So we focus on Cryptography modern technique for secure transmission of information over network.
Overview of cryptography
This document provides an overview of cryptography. It discusses that cryptography is the practice of secure communication in the presence of others. The purpose of cryptography is to defend against hackers and industrial espionage while securing e-commerce, bank accounts, intellectual property, and avoiding liability. Cryptography provides authentication, privacy, integrity, and non-repudiation. Encryption converts plain text to cipher text using a key while decryption converts cipher text to plain text. Common cryptographic algorithms are secret key cryptography, public key cryptography, and hash functions. Secret key cryptography uses a private key for encryption while public key cryptography uses a public key exchanged over an insecure channel. Hash functions produce a checksum of data. AES encryption is now commonly used and
Cryptography and Network Security
This document provides an overview of cryptography. It begins with a brief history of cryptography from ancient times to modern computer cryptography. It then defines basic concepts like encryption, decryption, plaintext and ciphertext. It describes different types of cryptography including codes, ciphers, steganography and computer ciphers. It also discusses cryptanalysis, security mechanisms like encryption, digital signatures and hash algorithms. It concludes by explaining applications of cryptography in daily life like emails and secured communication between family members.
Cryptography and E-Commerce
The document discusses the history and concepts of cryptography, especially in the context of e-commerce. It explains how cryptography evolved from ancient times to modern applications. Symmetric and asymmetric encryption methods are described, including how public/private key pairs work. Digital signatures are introduced as a way to provide authentication, integrity, and non-repudiation for electronic transactions.
Cryptography
Cryptography is the art and science of securing communication and information by encoding messages so that they are unintelligible to unauthorized parties. It involves techniques for encrypting and decrypting messages to ensure confidentiality, authentication, and integrity. The document defines key terminology related to cryptography such as encryption, decryption, plaintext, ciphertext, and cryptanalysis. It also discusses different types of cryptographic techniques including symmetric and asymmetric encryption as well as cryptographic applications and characteristics.
Basic Cryptography unit 4 CSS
The document discusses various topics related to public key cryptography including:
1) Public key cryptography uses key pairs (public/private keys) to encrypt and decrypt messages securely. Private keys are kept secret while public keys can be openly distributed.
2) RSA is a commonly used public key cryptosystem that uses large prime numbers to encrypt data. It is considered secure if a large enough key is used.
3) Digital signatures authenticate messages by encrypting a hash of the message with the sender's private key, allowing verification with their public key.
Cryptography ppt
This document discusses cryptography, which is the science of secure communication. It covers the basics of cryptography including its objectives, components, terminology, types, and advantages. Specifically, it explains how cryptography ensures confidentiality, integrity, and authentication of information. It also discusses symmetric and asymmetric encryption methods. Symmetric encryption uses a shared key for encryption and decryption while asymmetric encryption uses public and private key pairs. The document highlights how cryptography provides secure communication methods and is important for both military and everyday applications.
Cryptography
The document discusses various topics in cryptography including symmetric and asymmetric encryption algorithms. Symmetric algorithms like DES use a shared key for encryption and decryption while asymmetric algorithms like RSA use public-private key pairs. Digital signatures can be generated by encrypting a document hash with a private key and verified using the corresponding public key. Cryptography ensures security goals like confidentiality, integrity, authentication and non-repudiation of digital communications.
Cryptography
Cryptography is the science of using mathematics to encrypt and decrypt data.
Cryptography enables you to store sensitive information or transmit it across insecure networks so that it cannot be read by anyone except the intended recipient.
Cryptography
This document presents an overview of cryptography including its definition, history, basic terms, classifications, techniques, advantages, disadvantages, and applications. Cryptography is defined as the art and science of achieving security by encoding messages. The earliest evidence of cryptography dates back 4000 years to ancient Egypt. Techniques covered include symmetric and asymmetric encryption, transposition ciphers, substitution ciphers, block ciphers, stream ciphers, hashing, and steganography. Advantages of cryptography include confidentiality, authentication, data integrity, and non-repudiation, while disadvantages include reduced accessibility and inability to ensure high availability. Cryptography has applications in defense, e-commerce, business transactions, internet payments, user identification, and data security.
Cryptography Fundamentals
This document provides an overview of cryptography. It begins with background information, defining cryptography as using mathematics to encrypt and decrypt data to enable secure transmission. The main purposes of cryptography are then outlined as authentication, privacy/confidentiality, integrity, and non-repudiation. The methodology section describes symmetric and asymmetric encryption methods. Symmetric encryption uses the same key for encryption and decryption while asymmetric uses mathematically related public/private key pairs. Specific symmetric algorithms like block and stream ciphers are then defined along with concepts like padding schemes. The document concludes with sections on key exchange and digital signatures, which enable practical uses of cryptography.
Cryptography
This document provides an overview of cryptography concepts including symmetric and asymmetric encryption algorithms, hashing, digital signatures, and public key infrastructure (PKI). Symmetric algorithms like AES use a shared secret key for encryption and decryption while asymmetric algorithms like RSA use separate public and private keys. Digital signatures combine hashing and asymmetric encryption to provide data integrity, non-repudiation and authentication. PKI establishes trust in public keys through a system of digital certificates issued by a trusted certification authority.
What is Cryptography?
Basic Talk. 90 minute talk to an audience of Freshmen and Sophomores of IIT Bombay on 23/02/10 as a part of Science Week. Organised by Web and Coding Club. Place: GG 101 (Elec Department)
6. cryptography
The document discusses cryptography concepts such as encryption algorithms, key management, digital signatures, and cryptanalysis attacks. It covers symmetric and asymmetric cryptographic systems as well as specific algorithms like DES, RSA, and elliptic curve cryptography. The document also examines requirements for secrecy, authenticity and properties of cryptographic systems.
cryptography
Cryptography is the practice of securing communications through techniques like encryption and decryption. It involves constructing algorithms to protect information from adversaries and ensure data confidentiality, integrity, and authentication. The main types are transposition ciphers, which rearrange letters, and substitution ciphers, which replace letters. Modern cryptography expanded with computers to encrypt any data and uses symmetric key cryptography, where senders and receivers share a key, and public key cryptography, where they have different keys. It has many applications including ATMs, email, remote access, and smart cards.
Cryptography.ppt
This document provides an overview of cryptography. It begins with basic definitions related to cryptography and a brief history of its use from ancient times to modern ciphers. It then describes different types of ciphers like stream ciphers, block ciphers, and public key cryptosystems. It also covers cryptography methods like symmetric and asymmetric algorithms. Common types of attacks on cryptosystems like brute force, chosen ciphertext, and frequency analysis are also discussed.
Cryptography
Secret writing refers to cryptography and steganography. Cryptography involves encrypting messages so only authorized users can read them, while steganography hides information within other files or mediums. Common cryptographic techniques include symmetric and asymmetric encryption methods. Symmetric encryption uses a shared key between sender and receiver, while asymmetric encryption uses public and private key pairs. Steganography hides information by embedding it within images or other files.
Encryption presentation final
The document provides an overview of encryption, including what it is, why it is used, and how it works. Encryption is the process of encoding information to protect it, while decryption is decoding the information. There are two main types of encryption: asymmetric encryption which uses public and private keys, and symmetric encryption which uses a shared key. Encryption is used to secure important data like health records, credit cards, and student information from being stolen or read without permission. It allows senders to encode plain text into ciphertext using a key.
Cryptology - The practice and study of hiding information
First presentation of a Cryptography series, it aims to provide a high level overview of cryptography, clarify its objectives, define the terminology and explain the basics of how digital security systems, like Bitcoin, are built.
Mike Dance is a web developer and Bitcoin advocate.
----------
Presented at the BitcoinSYD Meetup on 11 February 2015
Cryptography ppt by vaishnavi khandelwal
Cryptography is the science and art of securing messages through techniques that transform plaintext into ciphertext. There are two main categories of cryptography: symmetric key cryptography which uses the same key for encryption and decryption, and asymmetric key cryptography which uses separate public and private keys. Cryptography aims to provide security goals such as confidentiality, integrity, non-repudiation and availability of data through the use of encryption algorithms, keys and ciphers.
Cryptography
The document discusses cryptography concepts including encryption, decryption, symmetric and asymmetric encryption techniques, cryptanalysis methods like brute force attacks, and the importance of secret keys. Symmetric encryption uses a shared secret key by both sender and receiver, while asymmetric encryption uses different public/private keys. Cryptanalysis aims to discover plaintext or keys by techniques like brute force trials or exploiting algorithm weaknesses. Longer cryptographic keys increase the difficulty of brute force attacks breaking the encryption.
Cryptography
Cryptography is the practice and study of securing communication through techniques like encryption. It has evolved through manual, mechanical, and modern eras using computers. Cryptography aims to achieve goals like authentication, confidentiality, integrity, and non-repudiation. Common attacks include brute force, chosen plaintext, and differential power analysis. Symmetric cryptography uses a shared key while asymmetric uses public/private key pairs. Digital signatures and watermarks can authenticate documents. DRM and watermarks control digital content distribution.
Cryptography
This document discusses cryptography and its various aspects. Cryptography is the science of securing communication and information. It involves encryption to encode data into an unreadable format and decryption to decode it. There are different types of cryptography like symmetric key, public key, and hash functions. Symmetric key uses a single key for encryption and decryption while public key uses different keys. Hash functions create a unique digest from data but the data cannot be recovered from the digest. Cryptography provides security features like authentication, privacy, integrity and non-repudiation. Keys are numerical values used in encryption algorithms. The document outlines advantages like privacy and disadvantages like the time needed for encryption and decryption.
Basic cryptography
This slide includes important term related to the cryptography.It Includes its history, types, requirement and examoles as well.
Caesar cipher
Our team worked on a Cryptography project. Our project was designed to convert a normal message or text to private and secure cipher text to maintain confidentiality and security in both corporate and national security. Here the plain text is converted into cipher text through a web platform where the user submits the confidential plain text and get the cipher text for the corresponding plain text.
Cryptography and encryption
Cryptography is the science of securing information and communication through techniques like encryption. The document discusses various cryptography concepts like encryption algorithms, symmetric and asymmetric key encryption, objectives of cryptography like confidentiality and integrity, and applications of encryption like web browsing, email, and video encryption. It also compares independent encryption with joint compression and encryption techniques for securing video data.
Cryptography ppt
The internet is the internationally connected network of computer networks with addresses that are administrated by IANA
Cryptography : The Art of Secured Messaging
Cryptography is the art of securing messages by encrypting information into an unreadable cipher text format that can only be decrypted by those with the secret key. Modern cryptography techniques are virtually unbreakable. Cryptography is commonly used to protect email, credit cards, and corporate data on the internet. There are two main types of cryptography - symmetric which uses one shared key for encryption and decryption, and asymmetric which uses two mathematically related keys, a public and private key. Cryptography ensures confidentiality, integrity, and authenticity of messages.
Evolution of Cryptography and Cryptographic techniques
1) Cryptography originated from the inherent human needs to communicate selectively and share information privately.
2) Early forms of cryptography included hieroglyphs and cipher techniques used by ancient Egyptian and Roman civilizations.
3) Modern cryptography is based on mathematical concepts from fields like number theory and uses algorithms like symmetric encryption, asymmetric encryption, hashing, and steganography to provide security services like confidentiality, integrity, authentication, and non-repudiation.
More Related Content
What's hot
Cryptography
The document discusses various topics in cryptography including symmetric and asymmetric encryption algorithms. Symmetric algorithms like DES use a shared key for encryption and decryption while asymmetric algorithms like RSA use public-private key pairs. Digital signatures can be generated by encrypting a document hash with a private key and verified using the corresponding public key. Cryptography ensures security goals like confidentiality, integrity, authentication and non-repudiation of digital communications.
Cryptography
Cryptography is the science of using mathematics to encrypt and decrypt data.
Cryptography enables you to store sensitive information or transmit it across insecure networks so that it cannot be read by anyone except the intended recipient.
Cryptography
This document presents an overview of cryptography including its definition, history, basic terms, classifications, techniques, advantages, disadvantages, and applications. Cryptography is defined as the art and science of achieving security by encoding messages. The earliest evidence of cryptography dates back 4000 years to ancient Egypt. Techniques covered include symmetric and asymmetric encryption, transposition ciphers, substitution ciphers, block ciphers, stream ciphers, hashing, and steganography. Advantages of cryptography include confidentiality, authentication, data integrity, and non-repudiation, while disadvantages include reduced accessibility and inability to ensure high availability. Cryptography has applications in defense, e-commerce, business transactions, internet payments, user identification, and data security.
Cryptography Fundamentals
This document provides an overview of cryptography. It begins with background information, defining cryptography as using mathematics to encrypt and decrypt data to enable secure transmission. The main purposes of cryptography are then outlined as authentication, privacy/confidentiality, integrity, and non-repudiation. The methodology section describes symmetric and asymmetric encryption methods. Symmetric encryption uses the same key for encryption and decryption while asymmetric uses mathematically related public/private key pairs. Specific symmetric algorithms like block and stream ciphers are then defined along with concepts like padding schemes. The document concludes with sections on key exchange and digital signatures, which enable practical uses of cryptography.
Cryptography
This document provides an overview of cryptography concepts including symmetric and asymmetric encryption algorithms, hashing, digital signatures, and public key infrastructure (PKI). Symmetric algorithms like AES use a shared secret key for encryption and decryption while asymmetric algorithms like RSA use separate public and private keys. Digital signatures combine hashing and asymmetric encryption to provide data integrity, non-repudiation and authentication. PKI establishes trust in public keys through a system of digital certificates issued by a trusted certification authority.
What is Cryptography?
Basic Talk. 90 minute talk to an audience of Freshmen and Sophomores of IIT Bombay on 23/02/10 as a part of Science Week. Organised by Web and Coding Club. Place: GG 101 (Elec Department)
6. cryptography
The document discusses cryptography concepts such as encryption algorithms, key management, digital signatures, and cryptanalysis attacks. It covers symmetric and asymmetric cryptographic systems as well as specific algorithms like DES, RSA, and elliptic curve cryptography. The document also examines requirements for secrecy, authenticity and properties of cryptographic systems.
cryptography
Cryptography is the practice of securing communications through techniques like encryption and decryption. It involves constructing algorithms to protect information from adversaries and ensure data confidentiality, integrity, and authentication. The main types are transposition ciphers, which rearrange letters, and substitution ciphers, which replace letters. Modern cryptography expanded with computers to encrypt any data and uses symmetric key cryptography, where senders and receivers share a key, and public key cryptography, where they have different keys. It has many applications including ATMs, email, remote access, and smart cards.
Cryptography.ppt
This document provides an overview of cryptography. It begins with basic definitions related to cryptography and a brief history of its use from ancient times to modern ciphers. It then describes different types of ciphers like stream ciphers, block ciphers, and public key cryptosystems. It also covers cryptography methods like symmetric and asymmetric algorithms. Common types of attacks on cryptosystems like brute force, chosen ciphertext, and frequency analysis are also discussed.
Cryptography
Secret writing refers to cryptography and steganography. Cryptography involves encrypting messages so only authorized users can read them, while steganography hides information within other files or mediums. Common cryptographic techniques include symmetric and asymmetric encryption methods. Symmetric encryption uses a shared key between sender and receiver, while asymmetric encryption uses public and private key pairs. Steganography hides information by embedding it within images or other files.
Encryption presentation final
The document provides an overview of encryption, including what it is, why it is used, and how it works. Encryption is the process of encoding information to protect it, while decryption is decoding the information. There are two main types of encryption: asymmetric encryption which uses public and private keys, and symmetric encryption which uses a shared key. Encryption is used to secure important data like health records, credit cards, and student information from being stolen or read without permission. It allows senders to encode plain text into ciphertext using a key.
Cryptology - The practice and study of hiding information
First presentation of a Cryptography series, it aims to provide a high level overview of cryptography, clarify its objectives, define the terminology and explain the basics of how digital security systems, like Bitcoin, are built.
Mike Dance is a web developer and Bitcoin advocate.
----------
Presented at the BitcoinSYD Meetup on 11 February 2015
Cryptography ppt by vaishnavi khandelwal
Cryptography is the science and art of securing messages through techniques that transform plaintext into ciphertext. There are two main categories of cryptography: symmetric key cryptography which uses the same key for encryption and decryption, and asymmetric key cryptography which uses separate public and private keys. Cryptography aims to provide security goals such as confidentiality, integrity, non-repudiation and availability of data through the use of encryption algorithms, keys and ciphers.
Cryptography
The document discusses cryptography concepts including encryption, decryption, symmetric and asymmetric encryption techniques, cryptanalysis methods like brute force attacks, and the importance of secret keys. Symmetric encryption uses a shared secret key by both sender and receiver, while asymmetric encryption uses different public/private keys. Cryptanalysis aims to discover plaintext or keys by techniques like brute force trials or exploiting algorithm weaknesses. Longer cryptographic keys increase the difficulty of brute force attacks breaking the encryption.
Cryptography
Cryptography is the practice and study of securing communication through techniques like encryption. It has evolved through manual, mechanical, and modern eras using computers. Cryptography aims to achieve goals like authentication, confidentiality, integrity, and non-repudiation. Common attacks include brute force, chosen plaintext, and differential power analysis. Symmetric cryptography uses a shared key while asymmetric uses public/private key pairs. Digital signatures and watermarks can authenticate documents. DRM and watermarks control digital content distribution.
Cryptography
This document discusses cryptography and its various aspects. Cryptography is the science of securing communication and information. It involves encryption to encode data into an unreadable format and decryption to decode it. There are different types of cryptography like symmetric key, public key, and hash functions. Symmetric key uses a single key for encryption and decryption while public key uses different keys. Hash functions create a unique digest from data but the data cannot be recovered from the digest. Cryptography provides security features like authentication, privacy, integrity and non-repudiation. Keys are numerical values used in encryption algorithms. The document outlines advantages like privacy and disadvantages like the time needed for encryption and decryption.
Basic cryptography
This slide includes important term related to the cryptography.It Includes its history, types, requirement and examoles as well.
Caesar cipher
Our team worked on a Cryptography project. Our project was designed to convert a normal message or text to private and secure cipher text to maintain confidentiality and security in both corporate and national security. Here the plain text is converted into cipher text through a web platform where the user submits the confidential plain text and get the cipher text for the corresponding plain text.
Cryptography and encryption
Cryptography is the science of securing information and communication through techniques like encryption. The document discusses various cryptography concepts like encryption algorithms, symmetric and asymmetric key encryption, objectives of cryptography like confidentiality and integrity, and applications of encryption like web browsing, email, and video encryption. It also compares independent encryption with joint compression and encryption techniques for securing video data.
Cryptography ppt
The internet is the internationally connected network of computer networks with addresses that are administrated by IANA
What's hot (20)
Cryptology - The practice and study of hiding information
Cryptology - The practice and study of hiding information
Similar to Cryptography
Cryptography : The Art of Secured Messaging
Cryptography is the art of securing messages by encrypting information into an unreadable cipher text format that can only be decrypted by those with the secret key. Modern cryptography techniques are virtually unbreakable. Cryptography is commonly used to protect email, credit cards, and corporate data on the internet. There are two main types of cryptography - symmetric which uses one shared key for encryption and decryption, and asymmetric which uses two mathematically related keys, a public and private key. Cryptography ensures confidentiality, integrity, and authenticity of messages.
Evolution of Cryptography and Cryptographic techniques
1) Cryptography originated from the inherent human needs to communicate selectively and share information privately.
2) Early forms of cryptography included hieroglyphs and cipher techniques used by ancient Egyptian and Roman civilizations.
3) Modern cryptography is based on mathematical concepts from fields like number theory and uses algorithms like symmetric encryption, asymmetric encryption, hashing, and steganography to provide security services like confidentiality, integrity, authentication, and non-repudiation.
Cryptography, a science of secure writing
Cryptography is the science of secure writing. It allows for authentication of users, privacy, integrity of messages, and non-repudiation through various encryption techniques. The document discusses the history and purposes of cryptography. It outlines modern cryptographic algorithms like secret key cryptography, hash functions, and public key cryptography. Specific algorithms like AES, RSA, and MD5 are also mentioned. The significance of passwords and drawbacks of cryptography are reviewed.
Fundamentals of cryptography
Introduction to Cryptography, Fundamentals of cryptography, Encryption, Decryption, Plaintext, Ciphertext, Public key cryptography, Secret key cryptography, steam cipher, block cipher, transposition cipher, security of cryptographic algorithm, cipher attack,
Cryptography
This document provides an overview of cryptography concepts including:
- Cryptography is the study of encrypted information and involves encryption to convert plaintext to ciphertext and decryption to convert ciphertext back to plaintext.
- Ciphers use algorithms and keys to encrypt and decrypt messages, with symmetric encryption using the same key and asymmetric encryption using different keys.
- Common encryption methods include substitution ciphers that swap letters and transposition ciphers that rearrange letters.
- Cryptanalysis involves decrypting messages without the key by analyzing patterns and weaknesses in encryption algorithms.
5 Cryptography Part1
The document discusses the Cryptography domain of the CISSP exam, which addresses principles and methods for ensuring information security. It covers topics like cryptography terms and history, different types of ciphers and cryptographic algorithms, and utilization of cryptography in technologies like PKI and protocols. The document also provides sample questions to test understanding of cryptography concepts.
Overview Of Cryptography
Cryptography is a method of securing communication and information by encoding messages in such a way that only authorized parties can access it. It involves encrypting plaintext using an algorithm and key to create ciphertext, which can then be decrypted using the same key. Common uses of cryptography include ensuring data privacy, authenticity, integrity, and non-repudiation. Symmetric key encryption uses the same key for encryption and decryption while asymmetric key encryption uses different public and private keys.
groupWork.pptx
This document discusses cryptographic techniques used for secure communication. It defines cryptography as the art of secret coding to provide confidentiality, integrity, authentication, and non-repudiation. The two main techniques are symmetric encryption, which uses a shared secret key, and asymmetric encryption, which uses public and private key pairs. Common symmetric algorithms discussed are AES, DES, and Blowfish, while asymmetric algorithms include RSA and Diffie-Hellman key exchange. The goal of cryptography is to provide security services like confidentiality, integrity, authentication, non-repudiation, availability, and access control.
Dr Petar Radanliev, PhD Thesis Department of Computer Sciences, University of...
Dr Petar Radanliev, PhD Thesis
Department of Computer Sciences, University of Oxford
Public Key Cryptography and potential attacks on PK
Cryptography cse,ru
This presentation contains the basics of cryptography. I have developed this presentation as a course material of Cryptography during my honors final year examination
Cryptography
The document provides information about the members of a group - Abdullah Rashid Baig, Adnan Haider, Muhammad Zakria, and Muhammad Zeeshan Khan. It then provides definitions and explanations of cryptography, cryptographic algorithms, encryption, decryption, plaintext, ciphertext, keys, secret key cryptography, public key cryptography, hashing, digital signatures, and security goals like confidentiality, authentication, integrity, availability, non-repudiation, and access control. It also discusses potential attacks on cryptography like viruses, traffic analysis, electromagnetic detection, and dictionary attacks.
Cryptography
Cryptography is the science of securing communication and information by transforming messages into an unreadable format. The document discusses the origins and evolution of cryptography from ancient hieroglyphs to modern ciphers like the Enigma machine. It outlines the main purposes of cryptography as authentication, data confidentiality, integrity and non-repudiation. The key types are described as secret key cryptography, public key cryptography and hash functions. Applications of cryptography include authentication, digital signatures, time stamping and secure network communications.
Cryptography and network security
This document provides an overview of cryptography and network security. It discusses what cryptography is, the basic terminology used in cryptography like plaintext, ciphertext, encryption, algorithms and keys. It explains the two main types of cryptographic functions: symmetric key cryptography which uses a single shared key between sender and receiver, and asymmetric key cryptography which uses public and private key pairs. It also outlines two network security models - the model for network security and the network access security model.
Cryptography and network security
This document provides an overview of cryptography and network security. It discusses what cryptography is, the basic terminology used in cryptography like plaintext, ciphertext, encryption, algorithms and keys. It explains the two main types of cryptographic functions: symmetric key cryptography which uses a single shared key between sender and receiver, and asymmetric key cryptography which uses public and private key pairs. It also outlines two network security models - the model for network security and the network access security model.
Cryptography
This document provides an overview of cryptography. It defines cryptography as a method of storing and transmitting data in a way that only the transmitter and receiver can access the information. The document then discusses the history of cryptography, including classic ciphers like the Caesar cipher and modern techniques like symmetric and asymmetric cryptography. It describes how symmetric cryptography uses a single key for encryption and decryption while asymmetric cryptography uses public-private key pairs. The document outlines some examples of symmetric and asymmetric algorithms and analyzes the advantages and disadvantages of each approach. Finally, it discusses some applications of cryptography like ATM PINs, encrypted drives, digital signatures, and time stamping.
Cryptography and Network Security-ch1-4.pptx
The document describes various classical encryption techniques. It discusses symmetric encryption where the same key is used for encryption and decryption. Some classical ciphers described include the Caesar cipher which shifts letters by a fixed number, monoalphabetic substitution ciphers which map each plaintext letter to a ciphertext letter, and the Playfair cipher which encrypts pairs of letters based on a 5x5 keyword matrix. It also covers cryptanalysis techniques like frequency analysis to crack classical ciphers.
Cryptography.pptx
Cryptography is used for authentication, privacy, integrity, and non-repudiation. It involves encoding messages so that only authorized parties can access it. Cryptography converts plain intelligible data into unintelligible data using encryption algorithms and keys, and then retransforms the data back into its original form using decryption. There are two main types of cryptosystems: symmetric which uses the same key to encrypt and decrypt, and asymmetric which uses different public and private keys.
Crytography
This document provides an overview of cryptography including its history, components, terminology, types, and applications. Cryptography is the science of securing communications and ensures confidentiality, integrity, and authentication of messages. It has military and civilian applications and relies on techniques from mathematics, computer science, and electrical engineering. The document discusses symmetric and asymmetric key cryptography, describing how symmetric uses a shared key while asymmetric uses public/private key pairs. Digital signatures and certificates are also covered.
Basic Cryptography.pdf
Cryptography is the study of secure communication techniques. The document provides a high-level overview of basic cryptography concepts including its history, objectives, terminology, and types (symmetric, asymmetric, hash functions). Symmetric cryptography uses a single secret key for encryption and decryption while asymmetric cryptography uses two keys: a public key for encryption and a private key for decryption. Popular symmetric algorithms include AES and RSA. Hash functions like MD5 and SHA are used to verify message integrity. Quantum computing may improve applications like cancer treatment, traffic optimization, and weather forecasting by solving complex optimization problems.
Network security
Network security involves securing computer networks and systems. It is handled by network administrators who implement security policies, software, and hardware to protect networks from unauthorized access, misuse, or denial of resources. Network security aims to authenticate users, control access to resources, and ensure confidentiality, integrity, non-repudiation and availability of networks and resources. Common methods include authentication, access control, encryption, digital signatures, and monitoring systems for security audits.
Similar to Cryptography (20)
Evolution of Cryptography and Cryptographic techniques
Evolution of Cryptography and Cryptographic techniques
Dr Petar Radanliev, PhD Thesis Department of Computer Sciences, University of...
Dr Petar Radanliev, PhD Thesis Department of Computer Sciences, University of...
Recently uploaded
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...
Denis is a dynamic and results-driven Chief Information Officer (CIO) with a distinguished career spanning information systems analysis and technical project management. With a proven track record of spearheading the design and delivery of cutting-edge Information Management solutions, he has consistently elevated business operations, streamlined reporting functions, and maximized process efficiency.
Certified as an ISO/IEC 27001: Information Security Management Systems (ISMS) Lead Implementer, Data Protection Officer, and Cyber Risks Analyst, Denis brings a heightened focus on data security, privacy, and cyber resilience to every endeavor.
His expertise extends across a diverse spectrum of reporting, database, and web development applications, underpinned by an exceptional grasp of data storage and virtualization technologies. His proficiency in application testing, database administration, and data cleansing ensures seamless execution of complex projects.
What sets Denis apart is his comprehensive understanding of Business and Systems Analysis technologies, honed through involvement in all phases of the Software Development Lifecycle (SDLC). From meticulous requirements gathering to precise analysis, innovative design, rigorous development, thorough testing, and successful implementation, he has consistently delivered exceptional results.
Throughout his career, he has taken on multifaceted roles, from leading technical project management teams to owning solutions that drive operational excellence. His conscientious and proactive approach is unwavering, whether he is working independently or collaboratively within a team. His ability to connect with colleagues on a personal level underscores his commitment to fostering a harmonious and productive workplace environment.
Date: May 29, 2024
Tags: Information Security, ISO/IEC 27001, ISO/IEC 42001, Artificial Intelligence, GDPR
-------------------------------------------------------------------------------
Find out more about ISO training and certification services
Training: ISO/IEC 27001 Information Security Management System - EN | PECB
ISO/IEC 42001 Artificial Intelligence Management System - EN | PECB
General Data Protection Regulation (GDPR) - Training Courses - EN | PECB
Webinars: https://pecb.com/webinars
Article: https://pecb.com/article
-------------------------------------------------------------------------------
For more information about PECB:
Website: https://pecb.com/
LinkedIn: https://www.linkedin.com/company/pecb/
Facebook: https://www.facebook.com/PECBInternational/
Slideshare: http://www.slideshare.net/PECBCERTIFICATION
clinical examination of hip joint (1).pdf
described clinical examination all orthopeadic conditions .
The History of Stoke Newington Street Names
Presented at the Stoke Newington Literary Festival on 9th June 2024
www.StokeNewingtonHistory.com
Walmart Business+ and Spark Good for Nonprofits.pdf
"Learn about all the ways Walmart supports nonprofit organizations.
You will hear from Liz Willett, the Head of Nonprofits, and hear about what Walmart is doing to help nonprofits, including Walmart Business and Spark Good. Walmart Business+ is a new offer for nonprofits that offers discounts and also streamlines nonprofits order and expense tracking, saving time and money.
The webinar may also give some examples on how nonprofits can best leverage Walmart Business+.
The event will cover the following::
Walmart Business + (https://business.walmart.com/plus) is a new shopping experience for nonprofits, schools, and local business customers that connects an exclusive online shopping experience to stores. Benefits include free delivery and shipping, a 'Spend Analytics” feature, special discounts, deals and tax-exempt shopping.
Special TechSoup offer for a free 180 days membership, and up to $150 in discounts on eligible orders.
Spark Good (walmart.com/sparkgood) is a charitable platform that enables nonprofits to receive donations directly from customers and associates.
Answers about how you can do more with Walmart!"
Your Skill Boost Masterclass: Strategies for Effective Upskilling
Your Skill Boost Masterclass: Strategies for Effective UpskillingExcellence Foundation for South Sudan
Strategies for Effective Upskilling is a presentation by Chinwendu Peace in a Your Skill Boost Masterclass organisation by the Excellence Foundation for South Sudan on 08th and 09th June 2024 from 1 PM to 3 PM on each day.Chapter 4 - Islamic Financial Institutions in Malaysia.pptx
Chapter 4 - Islamic Financial Institutions in Malaysia.pptxMohd Adib Abd Muin, Senior Lecturer at Universiti Utara Malaysia
This slide is special for master students (MIBS & MIFB) in UUM. Also useful for readers who are interested in the topic of contemporary Islamic banking.
Pollock and Snow "DEIA in the Scholarly Landscape, Session One: Setting Expec...
Pollock and Snow "DEIA in the Scholarly Landscape, Session One: Setting Expec...National Information Standards Organization (NISO)
This presentation was provided by Steph Pollock of The American Psychological Association’s Journals Program, and Damita Snow, of The American Society of Civil Engineers (ASCE), for the initial session of NISO's 2024 Training Series "DEIA in the Scholarly Landscape." Session One: 'Setting Expectations: a DEIA Primer,' was held June 6, 2024.Advanced Java[Extra Concepts, Not Difficult].docx
This is part 2 of my Java Learning Journey. This contains Hashing, ArrayList, LinkedList, Date and Time Classes, Calendar Class and more.
Natural birth techniques - Mrs.Akanksha Trivedi Rama University
Natural birth techniques - Mrs.Akanksha Trivedi Rama UniversityAkanksha trivedi rama nursing college kanpur.
Natural birth techniques are various type such as/ water birth , alexender method, hypnosis, bradley method, lamaze method etcHow to Manage Your Lost Opportunities in Odoo 17 CRM
Odoo 17 CRM allows us to track why we lose sales opportunities with "Lost Reasons." This helps analyze our sales process and identify areas for improvement. Here's how to configure lost reasons in Odoo 17 CRM
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UP
This Dissertation explores the particular circumstances of Mirzapur, a region located in the
core of India. Mirzapur, with its varied terrains and abundant biodiversity, offers an optimal
environment for investigating the changes in vegetation cover dynamics. Our study utilizes
advanced technologies such as GIS (Geographic Information Systems) and Remote sensing to
analyze the transformations that have taken place over the course of a decade.
The complex relationship between human activities and the environment has been the focus
of extensive research and worry. As the global community grapples with swift urbanization,
population expansion, and economic progress, the effects on natural ecosystems are becoming
more evident. A crucial element of this impact is the alteration of vegetation cover, which plays a
significant role in maintaining the ecological equilibrium of our planet.Land serves as the foundation for all human activities and provides the necessary materials for
these activities. As the most crucial natural resource, its utilization by humans results in different
'Land uses,' which are determined by both human activities and the physical characteristics of the
land.
The utilization of land is impacted by human needs and environmental factors. In countries
like India, rapid population growth and the emphasis on extensive resource exploitation can lead
to significant land degradation, adversely affecting the region's land cover.
Therefore, human intervention has significantly influenced land use patterns over many
centuries, evolving its structure over time and space. In the present era, these changes have
accelerated due to factors such as agriculture and urbanization. Information regarding land use and
cover is essential for various planning and management tasks related to the Earth's surface,
providing crucial environmental data for scientific, resource management, policy purposes, and
diverse human activities.
Accurate understanding of land use and cover is imperative for the development planning
of any area. Consequently, a wide range of professionals, including earth system scientists, land
and water managers, and urban planners, are interested in obtaining data on land use and cover
changes, conversion trends, and other related patterns. The spatial dimensions of land use and
cover support policymakers and scientists in making well-informed decisions, as alterations in
these patterns indicate shifts in economic and social conditions. Monitoring such changes with the
help of Advanced technologies like Remote Sensing and Geographic Information Systems is
crucial for coordinated efforts across different administrative levels. Advanced technologies like
Remote Sensing and Geographic Information Systems
9
Changes in vegetation cover refer to variations in the distribution, composition, and overall
structure of plant communities across different temporal and spatial scales. These changes can
occur natural.
How to Fix the Import Error in the Odoo 17
An import error occurs when a program fails to import a module or library, disrupting its execution. In languages like Python, this issue arises when the specified module cannot be found or accessed, hindering the program's functionality. Resolving import errors is crucial for maintaining smooth software operation and uninterrupted development processes.
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...Nguyen Thanh Tu Collection
https://app.box.com/s/y977uz6bpd3af4qsebv7r9b7s21935vdThe Diamonds of 2023-2024 in the IGRA collection
A review of the growth of the Israel Genealogy Research Association Database Collection for the last 12 months. Our collection is now passed the 3 million mark and still growing. See which archives have contributed the most. See the different types of records we have, and which years have had records added. You can also see what we have for the future.
Main Java[All of the Base Concepts}.docx
This is part 1 of my Java Learning Journey. This Contains Custom methods, classes, constructors, packages, multithreading , try- catch block, finally block and more.
Recently uploaded (20)
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...
Walmart Business+ and Spark Good for Nonprofits.pdf
Walmart Business+ and Spark Good for Nonprofits.pdf
Your Skill Boost Masterclass: Strategies for Effective Upskilling
Your Skill Boost Masterclass: Strategies for Effective Upskilling
Chapter 4 - Islamic Financial Institutions in Malaysia.pptx
Chapter 4 - Islamic Financial Institutions in Malaysia.pptx
Pollock and Snow "DEIA in the Scholarly Landscape, Session One: Setting Expec...
Pollock and Snow "DEIA in the Scholarly Landscape, Session One: Setting Expec...
Natural birth techniques - Mrs.Akanksha Trivedi Rama University
Natural birth techniques - Mrs.Akanksha Trivedi Rama University
How to Manage Your Lost Opportunities in Odoo 17 CRM
How to Manage Your Lost Opportunities in Odoo 17 CRM
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UP
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UP
Film vocab for eal 3 students: Australia the movie
Film vocab for eal 3 students: Australia the movie
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...
BÀI TẬP BỔ TRỢ TIẾNG ANH 8 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2023-2024 (CÓ FI...
Digital Artefact 1 - Tiny Home Environmental Design
Digital Artefact 1 - Tiny Home Environmental Design
Cryptography
- 1. Institute of Information Technology & Management presentation On Cryptography Submitted to:- Submitted by:- D.D Shrivastava Sir Suraj Shukla Dept cs & it 0915IT091060 IT 3rd year
- 2. What is Cryptography • Cryptography is the science of encrypting and decrypting written communication. It comes from the Greek word “kryptos ,” meaning hidden, and “graphia ,” meaning writing. • Cryptography is a method of storing and transmitting data in a form that only those it is intended for can read and process. It is a science of protecting information by encoding it into an unreadable format. Cryptography is an effective way of protecting sensitive information as it is stored on media or transmitted through network communication paths
- 3. History of Cryptography • Cryptography has roots that began around 2000 B.C. in Egypt when hieroglyphics were used to decorate tombs to tell the story of the life of the deceased. • A Hebrew cryptographic method required the alphabet to be flipped so that each letter in the original alphabet is mapped to a different letter in the flipped alphabet. The encryption method was called atbash. • ABCDEFGHI JK LMNOPQ R STU VW XYZ • ZYXWVUTSR QP ONMLKJ I HGF ED CBA • Security= hvxfirgb
- 4. Continue… Around 400 B.C., the Spartans used a system of encrypting information by writing a message on a sheet of papyrus, which was wrapped around a staff.
- 5. Continue… • During World War II, simplistic encryption device called Enigma machine used for tactical communication
- 6. Cryptosystem Services • Confidentiality • Integrity • Authenticity • Nonrepudiation • Access Control
- 7. Keyspace • An algorithm contains a keyspace, which is a range of values that can be used to construct a key. The key is made up of random values within the keyspace range. The larger the keyspace, the more available values can be used to represent different keys, and the more random the keys are, the harder it is for intruders to figure them out.
- 9. Types of Cryptography • Stream-based Ciphers-a stream cipher treats the message as a stream of bits or bytes and performs mathematical functions on them individually. • Block Ciphers- When a block cipher algorithm is used for encryption and decryption purposes, the message is divided into blocks of bits. These blocks are then put through substitution , transposition , and other mathematical functions.
- 12. Cryptographic Methods • Symmetric – Same key for encryption and decryption – Key distribution problem • Asymmetric – Mathematically related key pairs for encryption and decryption – Public and private keys • Hybrid Encryption Methods(Public Key Cryptography)
- 13. Symmetric Algorithms • Data Encryption Standard (DES) – Modes: ECB, CBC, CFB, OFB, CM • Triple-DES (3DES) • Advanced Encryption Standard (AES) • International Data Encryption Algorithm (IDEA) • Blowfish
- 14. Example of Symmetric algorithms
- 15. Strength and Weakness • Strengths • Much faster than asymmetric systems • Hard to break if using a large key size • Weaknesses • Key distribution It requires a secure mechanism to deliver keys properly. • Limited security It can provide confidentiality, but not authenticity.
- 16. Asymmetric Algorithms • RSA(Ron Rivest, Adi Shamir, and Leonard Adleman) • El Gamal • Elliptic Curve Cryptography (ECC)
- 17. Example of Asymmetric algorithms
- 18. Strength and Weakness • Strengths • Better key distribution than symmetric systems • Better scalability than symmetric systems • Can provide confidentiality, authentication, and nonrepudiation • Weaknesses • Works much slower than symmetric systems
- 19. Hybrid Encryption In the hybrid approach, the two different approaches are used in a complementary manner, with each performing a different function. A symmetric algorithm creates keys that are used for encrypting bulk data and an asymmetric algorithm creates keys that are used for automated key distribution.
- 20. Example of Hybrid Encryption
- 21. This is all about Cryptography THANK YOU Any Queries
Editor's Notes
- RSA, named after its inventors Ron Rivest, Adi Shamir, and Leonard Adlemanused for digital signatures and encryption. It was developed in 1978 at MIT and providesauthentication as well as encryption.