What is the full-form of CMAC?

HMAC (Hash-based Message Authentication Code) and CMAC (Cipher-based Message Authentication Code) are both cryptographic constructions used for message authentication. HMAC is a hash-based construction, while CMAC is a cipher-based construction.  Here are some differences between HMAC and CMAC: Construction: HMAC uses a cryptographic hash function, while CMAC uses a block cipher. Function: HMAC is a variable-length hash, while CMAC is a fixed-length hash. Speed: HMAC is usually faster than CMAC. Use cases: HMAC is used with a variety of hashing methods, including MD5, SHA-1, SHA-256, and... Show more

HMAC (Hash-based Message Authentication Code) and CMAC (Cipher-based Message Authentication Code) are both cryptographic constructions used for message authentication. HMAC is a hash-based construction, while CMAC is a cipher-based construction. 

Here are some differences between HMAC and CMAC:
Construction: HMAC uses a cryptographic hash function, while CMAC uses a block cipher.
Function: HMAC is a variable-length hash, while CMAC is a fixed-length hash.
Speed: HMAC is usually faster than CMAC.
Use cases: HMAC is used with a variety of hashing methods, including MD5, SHA-1, SHA-256, and SHA-3. CMAC is suitable for authenticating data sent using wide-area networks. 
HMAC and CMAC are both algorithms for generating MAC based symmetric block ciphers. HMAC provides client and server with a shared private key that is known only to them. The client makes a unique hash (HMAC) for every request. 
CMAC is a MAC that is based on the use of a block cipher mode of operations for use with AES and triple DES. It is also adopted by NIST. CMAC overcomes the limitations of the Data Authentication Algorithm (DAA) which is based on DES. 

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