e/Distinguishing attack

Information
has gloss	eng: In cryptography, a distinguishing attack is broadly an attack in which the attacker is given a black box containing either an instance of the system under attack with an unknown key, or a random object in the domain that the system aims to emulate. For example, a distinguishing attack on a stream cipher such as RC4 might be one that determines whether a given stream of bytes is random or generated by RC4 with an unknown key.
lexicalization	eng: distinguishing attack
instance of	c/Cryptographic attacks