\bib{1996/bellare-hmac} \yr 1996 \by Mihir Bellare \by Ran Canetti \by Hugo Krawczyk \paper Keying hash functions for message authentication \url http://www-cse.ucsd.edu/~mihir/\allowbreak papers/hmac.html \seeolder \cite{1996/bellare-hmac-draft} \endref