Yvonne Hitchcock Yiu Shing Terry Tin Juan Manuel González Nieto Colin Boyd Paul Montague A Password-Based Authenticator: Security Proof and Applications. 388-401 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2904&spage=388 2003 conf/indocrypt/2003 INDOCRYPT db/conf/indocrypt/indocrypt2003.html#HitchcockTNBM03