attack model
classification of cryptographic attacks specifying the kind of access a cryptanalyst has to a system under attack
side-channel attack
any attack based on information gained from the implementation of a computer system
passive attack
attempting to break a system solely based upon ciphertext
known-key distinguishing attack
attack model against symmetric ciphers, whereby an attacker who knows the key can find a structural property in cipher, where the transformation from plaintext to ciphertext is not random