positive identification evidence proving that you are who you say you are; evidence establishing that you are among the group of people already known to the system; recognition by the system leads to acceptance; "a system for positive identification can prevent the use of a single identity by several people"
A password is a secret word or string of characters that is used for authentication, to prove identity or gain access to a resource . The password should be kept secret from those not allowed access. The use of passwords is known to be ancient.
OmegaWiki Dictionary
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password A prearranged reply to the challenge of a sentry.
password A string of characters, known only to a user, used, along with a user name, to log in to some computer or network etc.
