This book constitutes the thoroughly refereed post-proceedings of the 10th International Workshop on Security Protocols, held in Cambridge, UK, in April 2002.The 16 revised full papers presented together with transcriptions of the discussions following the presentations have passed through two rounds of reviewing, revision, and selection. Also included are abstracts and summaries of an introduction and a keynote, as well as a concluding discussion and statement. Among the topics addressed are authentication, mobile ad-hoc network security, secure distributed document processing, access control, confidentiality, protocol attacks, delegation, certified transfer servers, intrusion tolerance, multi-party communication protocols, IPv6 security, and others.