This volume contains the proceedings of the 4th International Conference on - formation and Communications Security (ICICS2002). The three previous c- ferenceswereheldinBeijing(ICICS97), Sydney(ICICS99)andXian(ICICS01), where we had an enthusiastic and well-attended event. ICICS2002 is sponsored and organized by the Laboratories for Information Technology, Singapore, in co-operation with the Engineering Research Center for Information Security Technology of the Chinese Academy of Sciences and the International C- munications and Information Security Association (ICISA). During the past ?ve...

ICICS 2001, the Third International Conference on Information and Commu- cations Security, was held in Xi an, China, 13-16 November 2001. Among the preceding conferences, ICICS 97 was held in Beijing, China, 11-14 November 1997 and ICICS 99 in Sydney, Australia, 9-11 November 1999. The ICICS 97 and ICICS 99 proceedings were released as volumes 1334 and 1726 of Springer- Verlag s Lecture Notes in Computer Science series. ICICS 2001 was sponsored by the Chinese Academy of Sciences (CAS), the - tional Natural Science Foundation of China, and the China Computer Fe- ration. The conference was...