6/20/2023 0 Comments Macbook encryption algorithmSimilar to hash, MAC function also compresses an arbitrary long input into a fixed length output. The sender uses some publicly known MAC algorithm, inputs the message and the secret key K and produces a MAC value. Let us now try to understand the entire process in detail − The process of using MAC for authentication is depicted in the following illustration − For establishing MAC process, the sender and receiver share a symmetric key K.Įssentially, a MAC is an encrypted checksum generated on the underlying message that is sent along with a message to ensure message authentication. MAC algorithm is a symmetric key cryptographic technique to provide message authentication. Message authentication can be provided using the cryptographic techniques that use secret keys as done in case of encryption. In this threat, the user is not sure about the originator of the message. In the last chapter, we discussed the data integrity threats and the use of hashing technique to detect if any modification attacks have taken place on the data.Īnother type of threat that exist for data is the lack of message authentication.
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