4 ms·
Most stream ciphers just output a pseudorandom stream to be xored with the plaintext. Treating it as a PRG simplifies the security analysis. Letting the plainte
by tveita 13y ago
Most stream ciphers just output a pseudorandom stream to be xored with the plaintext.
Treating it as a PRG simplifies the security analysis. Letting the plaintext affect the state is more likely to hurt than help if you assume that the attacker knows or can influence parts of the plaintext.
- quelsolaar 13y agoThis to me is the challenge. If done the wrong way you would allow an attacker to influence the algorithm, done the right way it could remove any patterns created by the key. It seams all attacks proposed in this thread try to attack this problem, while the rest seams harder to attack.