TAILIEUCHUNG - Lecture Network security: Chapter 17 - Dr. Munam Ali Shah

The topic discussed in this chapter are: We will explore the need, features and characteristics of public key cryptography; the working/function of a public key cryptography scheme will be discussed in detail; RSA, as an example, will be explained. | Network Security Lecture 17 Presented by: Dr. Munam Ali Shah Summary of the Previous Lecture We discussed stream ciphers and its working We explored how stream ciphers are efficient when compared to block ciphers in terms of performance Some examples of stream ciphers such as RC4, RC5 and blowfish etc. were explored Summary of the previous Lecture Stream Cipher Properties some design considerations are: long period with no repetitions statistically random depends on large enough key large linear complexity use of highly non-linear boolean functions Ci = Mi XOR StreamKeyi 3 Criteria from Rueppel Stream Cipher Illustration Summary of the Previous Lecture (RC4) a proprietary cipher owned by RSA another Ron Rivest design, simple but effective variable key size (1-256 bytes) byte-oriented stream cipher widely used (web SSL/TLS, wireless WEP) key forms random permutation of all 8-bit values uses that permutation to scramble input info processed a byte at a time Remained trade secret till .

• An ninh - Bảo mật
• Public key cryptography
• Network security
• Lecture Network security
• Computer network
• Computer hacking
• Internet security
• Asymmetric key cryptography
• Bài giảng Mật mã học
• Mật mã học
• Euclidean algorithm
• Security levels
• Asymmetric cryptography
• Data security
• Data security and encryption
• Symmetric ciphers
• Asymmetric ciphers
• Cryptographic data integrity algorithms
• Mutual trust