(cryptography) An attack on a cryptosystem that relies on the attacker's knowledge of not just some ciphertexts encrypted with that system and key, but also their corresponding plaintexts (cribs). More powerful than a ciphertext-only attack, but less powerful than a chosen-plaintext attack.

past participle of know any better

past participle of know someone in the biblical sense

A rhetorical question used to express incredulity or surprise: who would have guessed it?; who would have thought that would happen?

past participle of know when to fold 'em

past participle of know which end is up

People are similar in character to their friends.

past participle of know where the bodies are buried

past participle of know which side one's bread is buttered on

(rare) known