This book constitutes the thoroughly refereed post-proceedings of the 12th International Workshop on Security Protocols, held in Cambridge, UK, in April 2004.
The 21 revised full papers presented together with edited transcriptions of some of the discussions following the presentations have passed through two rounds of reviewing, revision, and selection. Among the topics addressed are authentication, anonymity, verification of cryptographic protocols, mobile ad-hoc network security, denial of service, SPKI, access control, timing attacks, API security, biometrics for security, and others.