Encryption & Decryption
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It is a Presentation on the software named "Encryption & Decryption" made using C++ programming language. It helps us to encrypt and decrypt data. It helps us to protect and Safe our important information & data. For any queries : jayantbhatt910@gmail.com
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Introduction To PKI Technology
The document provides an overview of a course on PKI (Public Key Infrastructure) technology. It outlines the topics that will be covered over two days, including secret key cryptography algorithms like AES and RSA, digital certificates, certificate authorities, and practical PKI applications like S/MIME, SSL, and IPSEC. The objectives of the course are to understand cryptographic fundamentals, public key infrastructure elements and how they interact, and why PKI is useful for enabling e-commerce and enhancing security.
Encryption And Decryption
This document discusses encryption and decryption. It was developed by four students and submitted to their professor. The document introduces encryption as converting plaintext to ciphertext and decryption as converting ciphertext back to plaintext. It explains that encryption uses a key to scramble the plaintext and decryption uses the same key to unscramble the ciphertext to retrieve the original plaintext. The document also briefly mentions the feasibility study, methodology, purpose of providing security, and system requirements for the encryption/decryption software.
Hash Function
This document discusses message authentication techniques including message encryption, message authentication codes (MACs), and hash functions. It describes how each technique can be used to authenticate messages and protect against various security threats. It also covers how symmetric and asymmetric encryption can provide authentication when used with MACs or digital signatures. Specific MAC and hash functions are examined like HMAC, SHA-1, and SHA-2. X.509 is introduced as a standard for digital certificates.
User authentication
USER AUTHENTICATION
MEANS OF USER AUTHENTICATION
PASSWORD AUTHENTICATION
PASSWORD VULNERABILITIES
USE OF HASHED PASSWORDS – IN UNIX
PASSWORD CRACKING TECHNIQUES
USING BETTER PASSWORDS
TOKEN AUTHENTICATION
BIO-METRIC AUTHENTICATION
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This slide includes important term related to the cryptography.It Includes its history, types, requirement and examoles as well.
Symmetric and asymmetric key
Symmetric encryption uses a shared secret key between the sender and receiver to encrypt and decrypt messages. It is faster than asymmetric encryption but requires secure key exchange. Asymmetric encryption uses separate public and private keys, where the public key is used to encrypt and the private key decrypts, allowing secure communication without pre-shared keys. Common symmetric algorithms are AES and DES, while asymmetric algorithms include RSA, Diffie-Hellman, and ECDSA.
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Introduction To PKI Technology
The document provides an overview of a course on PKI (Public Key Infrastructure) technology. It outlines the topics that will be covered over two days, including secret key cryptography algorithms like AES and RSA, digital certificates, certificate authorities, and practical PKI applications like S/MIME, SSL, and IPSEC. The objectives of the course are to understand cryptographic fundamentals, public key infrastructure elements and how they interact, and why PKI is useful for enabling e-commerce and enhancing security.
Encryption And Decryption
This document discusses encryption and decryption. It was developed by four students and submitted to their professor. The document introduces encryption as converting plaintext to ciphertext and decryption as converting ciphertext back to plaintext. It explains that encryption uses a key to scramble the plaintext and decryption uses the same key to unscramble the ciphertext to retrieve the original plaintext. The document also briefly mentions the feasibility study, methodology, purpose of providing security, and system requirements for the encryption/decryption software.
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This document discusses message authentication techniques including message encryption, message authentication codes (MACs), and hash functions. It describes how each technique can be used to authenticate messages and protect against various security threats. It also covers how symmetric and asymmetric encryption can provide authentication when used with MACs or digital signatures. Specific MAC and hash functions are examined like HMAC, SHA-1, and SHA-2. X.509 is introduced as a standard for digital certificates.
User authentication
USER AUTHENTICATION
MEANS OF USER AUTHENTICATION
PASSWORD AUTHENTICATION
PASSWORD VULNERABILITIES
USE OF HASHED PASSWORDS – IN UNIX
PASSWORD CRACKING TECHNIQUES
USING BETTER PASSWORDS
TOKEN AUTHENTICATION
BIO-METRIC AUTHENTICATION
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This slide includes important term related to the cryptography.It Includes its history, types, requirement and examoles as well.
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Symmetric encryption uses a shared secret key between the sender and receiver to encrypt and decrypt messages. It is faster than asymmetric encryption but requires secure key exchange. Asymmetric encryption uses separate public and private keys, where the public key is used to encrypt and the private key decrypts, allowing secure communication without pre-shared keys. Common symmetric algorithms are AES and DES, while asymmetric algorithms include RSA, Diffie-Hellman, and ECDSA.
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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.
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# Students can catch up on notes they missed because of an absence.
# Underachievers can find peer developed notes that break down lecture and study material in a way that they can understand
# Students can earn better grades, save time and study effectively
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Our Belief – “The great breakthrough in your life comes when you realize it, that you can learn anything you need to learn; to accomplish any goal that you have set for yourself. This means there are no limits on what you can be, have or do.”
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this ppt is on the topic of system security. there are some topic which are introduce very nicely.there are some commont topic introduce in the
1. firewall
2.antivirus
3.malware
and IOT
these are the sub topic..
Network attacks
Basic Network Attacks
The active and passive attacks can be differentiated on the basis of what are they, how they are performed and how much extent of damage they cause to the system resources. But, majorly the active attack modifies the information and causes a lot of damage to the system resources and can affect its operation. Conversely, the passive attack does not make any changes to the system resources and therefore doesn’t causes any damage.
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The document provides tips for keeping a network secure, including always keeping virus software and Windows updates enabled, using firewalls, backing up data regularly, and using strong passwords. It warns about common password risks like using obvious words or writing passwords down. The document also covers securing laptops, email, wireless networks, and avoiding risks from open networks. Proper authentication, surge protection, and password protecting are emphasized as important security best practices.
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2. public key cryptography and RSA
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- The Internet Key Exchange (IKE) negotiates and establishes security associations to secure communications between two endpoints.
- IPSec policy defines which encryption, hashing, and authentication methods apply to different network traffic using protection suites and proposals.
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Encryption & Decryption
- 1. A Powerpoint presentation on By Jayant Bhatt jayantbhatt910@gmail.com
- 2. Content • Introduction. • About C++ . • Types of Encryption. • The process of Data Encryption. • Screenshots. • Why you need it?
- 3. Introduction Encryption is a security method in which information is encoded in such a way that only authorized user can read it. It uses encryption algorithm to generate ciphertext that can only be read if it is decrypted.
- 4. About C++(Programming Language) • It is a High level Language. • It was Developed by “Bjarne Stroustrup” in 1980 at AT&T Bell Laboratory with name C with Classes. • The C++ language definition is based on the ANSI (American National Standards Institute). • It runs on following platforms : Windows UNIX Mac-OS
- 5. Types of Encryption SYMMETRIC KEY ENCRYPTION Symmetric key encryption algorithm uses same cryptographic keys for both encryption and decryption of cipher text. PUBLIC KEY ENCRYPTION Public key encryption algorithm uses pair of keys, one of which is a secret key and one of which is public. These two keys are mathematically linked with each other.
- 6. Logic to encrypt the message Entered message ------> Acsii of each character ------> key ascii increment + 50 ascii ------> Ascii after increament to character ------> Character of acsii ------> H e l l o C + + 72 101 108 108 111 32 67 43 43 2+5 0 2+5 0 2+5 0 2+5 0 2+5 0 2+5 0 2+5 0 2+5 0 2+5 0 (72+50+2 ) 124 (101+50+ 2) 153 (108+50+ 2) 160 (108+50+ 2) 160 )111+50+ 2) 163 (32+50+2 ) 84 (67+50+2 ) 119 (43+50+2 ) 95 (43+50+2 ) 95 | Ö á á ú T w _ _
- 7. Why you need it? • Data cannot be hacked. • Protects our data. • Protects our physical assets. • Everyone cannot read it easily.
- 8. Screenshots
- 9. Screenshots
- 10. Screenshots
- 11. Screenshots
- 12. Screenshots
- 13. Screenshots
- 14. Thank You…