–Def: A language L is in BPP c,s ( 0 s(n) c(n) 1, n N) if there exists a probabilistic poly-time TM M s.t. : 1. w L, Pr[M accepts w] c(|w|),
CS555Spring 2012/Topic 51 Cryptography CS 555 Topic 5: Pseudorandomness and Stream Ciphers.
Cryptography CS 555
CS526Topic 3: Ciphers and Cipher Security 1 Information Security CS 526 Topic 3 Ciphers and Cipher Security: Stream Ciphers, Block Ciphers, Perfect Secrecy,