Overview#

Message Authentication Code (MAC) is Keyed Cryptographic Hash Function and process.

Message Authentication Code values are used for to verify the Integrity and Authenticity of a Message.

Message Authentication Codes are different than Digital Signatures because of Message Authentication Code are both generated and verified using the same Secret-key and therefore Message Authentication Codes cannot provide non-Repudiation of the message

Message Authentication Code Operations#

Message Authentication Code usages consists of three ]:

• Key Generation algorithm selects a Secret-key from the key space uniformly at random.
• Signature Generation returns a "tag" given the Secret-key and the message.
• Signature Verification provides Assurance the authenticity of the message given the shared Secret-key and the "tag" and either accepts or rejects the message's claim for authenticity.

More Information#

There might be more information for this subject on one of the following:

• Authentication
• BEAST
• Block Cipher Mode
• CBC-MAC
• CBOR Object Signing and Encryption
• Channel Bindings for TLS
• Cipher Suite
• Cryptographic Key
• Cryptographic Primitive
• DNSCurve
• Digital Key
• Encryption
• Galois Message Authentication Code
• Galois-Counter Mode
• HMAC-based One-Time Password Algorithm
• How SSL-TLS Works
• Initialization Vector
• Keyed-Hash Message Authentication Code
• Known Cipher Suites
• Length extension attack
• MAC
• Macaroons
• Master Secret
• Meet-in-the-Middle Attack
• Message Authentication
• Plenum Byzantine Fault Tolerant Protocol
• Poly1305
• Record Protocol
• Symmetric Key Cryptography
• TLS 1.3
• Time synchronization
• Tink
• Token_type