22-10-2010, 05:31 PM
05_Chapt5.ppt (Size: 959.5 KB / Downloads: 242)
05_Chapt5.ppt (Size: 959.5 KB / Downloads: 242)
Cryptography
Improvements
Stream cipher:
encryption rule depends on the plaintext symbol’s position in the stream of plaintext symbols
Block cipher:
encrypt several plaintext symbols at once in a block