Message Authentication Code - MAC

Message Authentication Code - MAC
A security code that is typed in by the user of a computer to access accounts or portals. This code is attached to the message or request sent by the user. Message authentication codes (MACs) attached to the message must be recognized by the receiving system in order to grant the user access. MACs are commonly used in electronic funds transfers (EFTs) to maintain information integrity.

Message authentication codes are usually required to access any kind of financial account. Banks, brokerage firms, trust companies and any other deposit, investment or insurance company that offers online access can employ these codes.


Investment dictionary. . 2012.

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  • Message authentication code field — (MAC)   An ISO term. See preferred term Message Authentication Code (MAC) …   International financial encyclopaedia

  • Message Authentication Code — Ein Message Authentication Code (MAC) dient dazu, Gewissheit über den Ursprung von Daten oder Nachrichten zu erhalten und ihre Integrität zu überprüfen.[1] MAC Algorithmen erfordern zwei Eingabeparameter, erstens die zu schützenden Daten und… …   Deutsch Wikipedia

  • Message Authentication Code — Code d authentification de message Un code d authentification de message (MAC, Message Authentication Code) est un code accompagnant des données dans le but d assurer l intégrité de ces dernières, en permettant de vérifier qu elles n ont subi… …   Wikipédia en Français

  • Message authentication code — Code d authentification de message Un code d authentification de message (MAC, Message Authentication Code) est un code accompagnant des données dans le but d assurer l intégrité de ces dernières, en permettant de vérifier qu elles n ont subi… …   Wikipédia en Français

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  • Message Authentication Code —   [Abk. MAC; dt. »Mitteilungsbeglaubigungscode«], digitale Signatur …   Universal-Lexikon

  • Message authentication code — In cryptography, a message authentication code (often MAC) is a short piece of information used to authenticate a message. A MAC algorithm, sometimes called a keyed (cryptographic) hash function, accepts as input a secret key and an arbitrary… …   Wikipedia

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