known-plaintext attack

Noun

 * 1)  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.

Translations

 * Finnish: tunnettuun selkotekstiin perustuva hyökkäys