This book constitutes the refereed proceedings of the 7th International Information Security Conference, ISC 2004, held in Palo Alto, CA, USA in September 2004.

The 36 revised full papers presented were carefully reviewed and selected from 106 submissions. The papers are organized in topical sections on key management, digital signatures, new algorithms, cryptanalysis, intrusion detection, access control, human authentication, certificate management, mobile and ad-hoc security, Web security, digital rights management, and software security.