Ver:
· http://en.wikipedia.org/wiki/Passphrase
Frase larga (por ejemplo, de 80 caracteres) pero fácil de recordar por el usuario, que realiza las mismas funciones de autenticación que una contraseña, con la ventaja de ser más difícil de conjeturar. [Ribagorda:1997]
A sequence of
words or other text used to control access to a computer system, program or
data. A passphrase is similar to a password in usage, but is generally longer
for added security. Passphrases are often used to control both access to, and
operation of, cryptographic programs and systems. Passphrases are particularly
applicable to systems that use the passphrase as an encryption key. The origin
of the term is by analogy with "password". The modern concept of
passphrases is believed to have been invented by Sigmund N. Porter (1) in 1982.
http://en.wikipedia.org/wiki/Passphrase
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