AES Guest Lecturer

More documents

Recommendations

Info

Attack Precautions • Avoid use of arrays. Compute values in SBOX and rCon. • Design algorithms and devices to work with constant time intervals. (independent of key and plaintext.) – Hidden CPU timing data is a threat. • Use same memory throughout, Cache is faster than DRAM • Compute Key Expansion on the fly. • Utilize pipelining to stabilize CPU power consumption.
Joan Daemen & Vincent Rijmen’s <strong>AES</strong> Selling Points • Extremely fast compared to other block ciphers. (tradeoff between size and speed) • The round transformation is parallel by design. Important in dedicated hardware. • Amenable to pipelining • The cipher does not use arithmetic operations so has no bias towards big or little endian architectures.
Page 1 and 2: AES Advanced Encryption Standard CS
Page 3 and 4: AES Block • AES has a fixed block
Page 5 and 6: AES Key or 192 bits (6 words) 11223
Page 7 and 8: Security • The key security featu
Page 9 and 10: AES Algorithm KeyExpansion(byte key
Page 11 and 12: - Sample Key: AES Algorithm Key Exp
Page 13 and 14: AES Algorithm Key Expansion w[0] 11
Page 15 and 16: Con - round Constants Powers of x =
Page 21 and 22: AES Algorithm KeyExpansion(byte key
Page 23 and 24: AES Algorithm AddRoundKey State 41
Page 25 and 26: AES Algorithm SubBytes • SubBytes
Page 27 and 28: AES Algorithm SubBytes X Y 0 1 2 3
Page 29 and 30: AES Algorithm SubBytes State 50 10
Page 31 and 32: AES Algorithm ShiftRows • Simple
Page 33 and 34: AES Algorithm - MixColumns • This
Page 35 and 36: AES Algorithm - InvMixColumns a ’
Page 37 and 38: Sample Conversions Input String Key
Page 39 and 40: Larger Plain Texts Encryption • H
Page 41 and 42: Larger Plain Texts Encryption Ciphe
Page 43 and 44: Padding • If plaintext messages a
Page 45 and 46: Attacks on AES • XSL Cryptanalysi
Page 47: Types of Side Channel Attacks • T
Page 51 and 52: Joan Daemen & Vincent Rijmen’s AE
Page 53 and 54: References Security and Attacking A
Page 55: References Applications / Implement

AES Guest Lecturer

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?