Iliano Cervesato Aaron D. Jaggard Andre Scedrov Joe-Kai Tsay Christopher Walstad Breaking and Fixing Public-Key Kerberos. 9 2006 2006 IACR Cryptology ePrint Archive http://eprint.iacr.org/2006/009 db/journals/iacr/iacr2006.html#CervesatoJSTW06