The third International Workshop on Information Security was held at the U- versity of Wollongong, Australia. Although e-commerce is already booming, it has not reached its full potential in terms of new, e cient and secure e-commerce protocols with added properties.

Multimedia Copyright Protection.- A Watermarking Scheme Based on the Characteristic of Addition among DCT Coefficients.- Affine Invariant Watermarks for 3D Polygonal and NURBS Based Models.- A Steganographic Framework for Reference Colour Based Encoding and Cover Image Selection.- Spatial-Domain Image Watermarking Robust against Compression, Filtering, Cropping, and Scaling.- Region-Based Watermarking by Distribution Adjustment.- Hiding Information in Color Images Using Small Color Palettes.- An Approach to the Objective and Quantitative Evaluation of Tamper-Resistant Software.- Characteristics of Some Binary Codes for Fingerprinting.- E-Commerce.- An Anonymous Auction Protocol with a Single Non-trusted Center Using Binary Trees.- Unlinkable Divisible Electronic Cash.- Weighted One-Way Hash Chain and Its Applications.- Linkability in Practical Electronic Cash Design.- Towards a Practical Secure Framework for Mobile Code Commerce.- Key Management.- Probabilistic Methods in Multicast Key Management.- Classification of Authentication Protocols: A Practical Approach.- Exploring Fair Exchange Protocols Using Specification Animation.- A Practical Implementation of Hierarchically Structured Key Predistribution System and Its Evaluation.- Network Security and Access Control.- An Efficient Protocol for Certified Electronic Mail.- Performance Analysis of Secure Web Server Based on SSL.- Sherlock: Commercial High Assurance Network Computing Extended Abstract.- The Role of the Development Process in Operating System Security.- Cryptographic Systems.- Threshold Fail-Stop Signature Schemes Based on Discrete Logarithm and Factorization.- A Signcryption Scheme Based on Integer Factorization.