M.Thompson, O.Kolesnikov, Berkeley National Laboratory Message Authentication Code MAC l Hash algorithm + key to make hash value dependant on the key l Most common form is HMAC (hash MAC) n hash( key, hash( key, data )) l Key affects both start and end of hashing process l Naming: hash + key = HMAC-hash MD5 1 HMAC-MD5 SHA-1 1 HMAC-SHA (recommended)
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