The 2005 Australasian Conference on Information Security and Privacy was the tenth in the annual series that started in 1996.Over the yearsACISP has grown from a relativelysmallconferencewith a largeproportionof paperscoming from Australia into a truly international conference with an established reputation. ACISP 2005 was held at Queensland University of Technology in Brisbane, d- ing July 4-6, 2005. This year there were 185 paper submissions and from these 45 papers were accepted. Accepted papers came from 13 countries, with the largest proportions coming from Australia (12), China (8) and Japan (6). India and Korea both contributed 2 papers and one came from Singapore. There were also 11 papers from European countries and 3 from North America. We would like to extend our sincere thanks to all authors who submitted papers to ACISP 2005. The contributed papers were supplemented by four invited talks from e- nent researchers in information security. The father-and-son team of Prof. and Dr. Bob Blakley (Texas A&M University and IBM) gave a talk entitled All Sail, No Anchor III, following up on a theme started at their ACISP 2000 - vited talk. Adrian McCullagh (Phillips Fox Lawyers and QUT) talked on the bene?t and perils of Internet banking. Ted Dunstone (Biometix) enlightened us on multimodal biometric systems. Yvo Desmedt (University College London) elucidated the growing gap between theory and practice in information security.