https://searchsecurity.techtarget.com/definition/message-authentication-code-MAC

Dear Abderrahim Hajji ,

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. AMAC requires two inputs: a message and a secret key known only to the originator of the message and its intended recipient(s).

Regards,

Shafagat

Thank you,

I search for an article(s) comparing the security performance of MAC(Message Authentication Codes). Not a definition.

I want to implement this best solution in MANET(Mobile Ad-hoc NETwork).

All: The security of the MAC is none. It is just still used for historical reasons.

MACs can be used to authenticate message between users by symmetric techniques. They can also be used by a single user to determine if his files have been altered, perhaps by a virus by compute the MAC of users' files and store that value in a table. MAC takes two inputs, a message and a secret key, and produces a fixed-size output, n bits. The MAC purpose is to facilitate assurances regarding both the source of a message and its integrity, , without the use of any additional mechanisms.

I will use the library to secure OLSR protocol (MANET).

The Crypto++ library presents two kinds of MAC algorithms:

Wich variety (Block ciphers or Hash functions) should i adopte?

MAC is used to authenticate communication parties to each other without using any additional mechanism