Praveen Gauravaram Shoichi Hirose Suganya Annadurai An Update on the Analysis and Design of NMAC and HMAC Functions. 49-60 2008 7 I. J. Network Security 1 http://ijns.femto.com.tw/contents/ijns-v7-n1/ijns-2008-v7-n1-p49-60.pdf db/journals/ijnsec/ijnsec7.html#GauravaramHA08