Computer and Network Security
CS494/594            Class 5   9/26/06

Topics

• DES
• Lucifer, CAST, blowfish
• RC*, IDEA, blocking
• lecture slides

Required reading

• Text: Chapter 3, 6.1, 6.2, 12.4
• Appendix C S DES
• OpenSSL DES api and encryption commands
• Coppersmith's DES and its strength against attacks
• DESX

Additional reading

• animated S-DES applets
• sci.crypt's cryptography FAQ could you pass this exam?
• RSA's cryptography FAQ
• NIST's FIPS46-3 DES/3DES and FIPS 81 blocking and blocking/padding tutorial
• linear cryptanalysis of DES
• Stalling's Encryption Options beyond DES '98
• S box design and Practical S box design bent functions
• Security of DESX in CryptoBytes
• EFF's DES cracker chip
• Eric Young's libdes DES software
• lucipher cipher
• blowfish
• CAST design and CAST references
• RFC 2144 CAST-128
• RFC 2040 RC5
• brute force of RC5-64
• RC6 or twofish
• RFC 2268 RC2 and On the design and security of RC2
• tea tiny encryption algorithm
• IDEA and IDEA weak keys
• padding block ciphers
• self-study course in block cipher cryptanalysis
• MAC's based on encryption functions CBC MAC and FIPS 113 or CMAC or NIST 800-38B
• as always, cruise the security page