This book constitutes the refereed proceedings of the Second International Conference on Applied Cryptography and Network Security, ACNS 2004, held in Yellow Mountain, China, in June 2004. The 36 revised full papers presented were carefully reviewed and selected from 297 submissions. The papers are organized in topical sections on security and storage, provably secure constructions, Internet security, digital signatures, security modeling, authenticated key exchange, security of deployed systems, cryptosystems design and analysis, cryptographic protocols, side channels and protocol analysis, intrusion detection and DoS, and cryptographic algorithms.

Avatars at Work and Play brings together contributions from leading social scientists and computer scientists who have conducted research on virtual environments used for collaboration and online gaming. They present a well-rounded and state-of-the-art overview of current applications of multi-user virtual environments, ranging from highly immersive virtual reality systems to internet-based virtual environments on personal computers. The volume is a follow-up to a previous essay collection, The Social Life of Avatars, which explored general issues in this field. This collection goes further, examining uses of shared virtual environments in practical settings such as scientific collaboration, distributed meetings, building models together, and others. It also covers online gaming in virtual environments, which has attracted hundreds of thousands of users and presents an opportunity for studying a myriad of social issues. Covering both work and play, the volume brings together issues common to the two areas, including: