On a cryptographic system. It is a method that starts with some
information about plaintexts and
their corresponding ciphertexts
(under some unknown key) and then determines more information about the
plaintexts.
See Also:
Attack; Ciphertext; Passive Countermeasures; Plaintext.
Electronic Frontier Foundation. Passive Attack. [Online, 2004.] Electronic
Frontier Foundation Website. http://gnupg.unixsecurity.com.br.