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Abstract
This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind. Distribution of this memo is unlimited. This document describes HMAC, a mechanism for message authentication using cryptographic hash functions. HMAC can be used with any iterative cryptographic hash function, e.g., MD5, SHA-1, in combination with a secret shared key. The cryptographic strength of HMAC depends on the properties of the underlying hash function. 1.
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Cite it as
@techreport{krawczyk1997hmac,
title = {HMAC: Keyed-Hashing for Message Authentication},
author = {Hugo Krawczyk and Mihir Bellare and Ran Canetti},
year = {1997},
doi = {10.17487/rfc2104},
}