出典:Wiktionary
ciphertext-only attack (複数形 ciphertext-only attacks)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/22 11:00 UTC 版)
In cryptography, a ciphertext-only attack (COA) or known ciphertext attack is an attack model for cryptanalysis where the attacker is assumed to have access only to a set of ciphertexts.