What is message authentication code (MAC)? - Definition from WhatIs.com

Definition

message authentication code (MAC)

Part of the Authentication glossary:

A message authentication code (MAC) is a cryptographic checksum on data that uses a session key to detect both accidental and intentional modifications of the data. 

Learn more about message authentication code:

Find out how an attacker cracks a symmetric key-based system.

What are the differences between symmetric and asymmetric encryption algorithms?

This was last updated in November 2010
Posted by: Margaret Rouse

Related Terms

Definitions

  • rainbow table

    - A rainbow table is a listing of all possible plaintext permutations of encrypted passwords specific to a given hash algorithm. Rainbow tables are often used by password cracking software for networ... (WhatIs.com)

  • single-factor token

    - A single-factor token is a small hardware device that produces one confirming credential for user authentication; the devices may be used in conjunction with other types of credentials for multifac... (WhatIs.com)

  • multifactor token

    - Multifactor tokens are security tokens that use more than one category of credential to confirm user authentication. The standard categories of authentication credentials are knowledge factors thi... (WhatIs.com)

Glossaries

  • Authentication

    - Terms related to authentication, including security definitions about passwords and words and phrases about proving identity.

  • Internet applications

    - This WhatIs.com glossary contains terms related to Internet applications, including definitions about Software as a Service (SaaS) delivery models and words and phrases about web sites, e-commerce ...

Ask a Question. Find an Answer.Powered by ITKnowledgeExchange.com

Ask An IT Question

Get answers from your peers on your most technical challenges

Ask Question

Tech TalkComment

Share
Comments

    Results

    Contribute to the conversation

    All fields are required. Comments will appear at the bottom of the article.