The first SKLOIS Conference on Information Security and Cryptography (CISC'05) was organized by the State Key Laboratory of Information Security (SKLOIS) of the Chinese Academy of Sciences. It was held in Beijing, China in December 15~17, 2005, and was sponsored by the Institute of Software, the Chinese Academy of Science, the Graduate School of the Chinese Academy of Science, and the National Science Foundations of China.

The international program committee of the conference received a total of 196 submissions (from 21 countries and regions). Each submission was reviewed by around 3 reviewers. Based on the review comments, 33 submissions were selected for presentation as regular papers which are published by Springer in the series of Lectures Notes in Computer Science, and another 32 were selected as short paperswhich are published in this proceedings. Note that due to the time constraint for paper review, and room limitations for the conference proceedings, many good papers have regrettably been rejected.

Many people and organizations helped in making the conference a reality. We would like to take this opportunity to thank the program committee members and the external experts for their invaluable help in producing the conference program. We thank the various sponsors and, last but not the least, we wish to thank all the authors who submitted papers to the conference, the invited speakers, the session chairs and all the conference attendees.

Finally we would like to note that the SKLOIS Conference on Information Security and Cryptology will be organized annually. We look forward to the continuoussupport by all the authors, reviewers, sponsors and organizers.