January 22, 2002
Practical Aspects of Modern Cryptography
Stream Cipher Integrity
nIt is easy for an adversary (even
one who can’t decrypt the ciphertext) to alter the plaintext in a
known way.
nBob to Bob’s Bank: Please transfer $1,000,002.00 to the account of my good friend Alice.
nThis
can be protected against by the careful addition of appropriate redundancy.