Authentication meaning

(1) Verifying the integrity of a transmitted message. See message integrity, email authentication and MAC.
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The process of validating a bond certificate to determine that it is genuine and not a fraud.
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Security measures designed to verify or validate the identity of a user or station prior to granting access to resources. Authentication mechanisms include passwords and intelligent tokens. See also intelligent token NAS, password, RADIUS, and RAS.
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The process of identifying an individual, message, file, and other data. The two major roles for authentication, therefore, are as follows: (1) confirming that the user is who he or she claims to be; and (2) that the message is authentic and not altered or forged. The term authentication should not be confused with a closely related term, authorization, which means determining what a user is allowed to do or see. In recent years, a number of products have been developed to assist in the authentication process, including biometrics (assessing users’ signatures, facial features, and other biological identifiers); smart cards (having microprocessor chips that run cryptographic algorithms and store a private key); digital certificates containing public or private keys; and SecureID, a commercialized product using a key and the current time to generate a random numbers stream that is verifiable by a server—thus ensuring that a potential user puts in the number on the card within a set amount of time (typically 5 or 10 seconds). Graham, R. Hacking Lexicon. Robert Graham Website. http://www .linuxsecurity.com/resource_files/documentation/hacking-dict.html.
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Something which validates or confirms the authenticity of something.
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(computing) Proof of the identity of a user logging on to some network.
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A hallmark or assay-mark on a piece of metalwork.
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