Author Description

The Fifth International Conference on Applied Cryptography and Network - curity (ACNS 2007) was held in Zhuhai, China, June 5–8, 2007. This volume contains papers that were accepted to the academic track of the conference. Theconferencereceivedanastoundingnumberofsubmissionsthisyear,which made the review process a challenging and demanding task. We are indebted to the members of the Program Committee and the external reviewers for all their hard work. The committee accepted 31 papers from roughly 260 submissions. These proceedings contain revised versions of the accepted papers. While - visions are expected to take the referees’ comments into account, this was not enforced and the authors bear full responsibility for the content of their papers. In addition to the academic track,the conference hosteda non-archivalind- trialtrackwhosepaperswerealsocarefullyselectedfromamongthesubmissions. Shai Halevi deserves the community’s gratitude for writing his Web subm- sion and review software, which we used for this conference. On a more personal level, we would like to extend our own deepest thanks to Shai for not only wr- ing his software, but for installing and maintaining the submission server for this conference. Thanks go also to the International Association for Cryptologic Research (IACR) for agreeing to host the server. It is our pleasure to thank the General Chair Yongfei Han, the Publicity Chair Jianying Zhou, and the Chair of the Organizing Committee Li Nan for their help and support in putting this conference together. Without their help, this conference wouldnot havebeen possible. Finally, we aregratefulto ONETS and Zhuhai College, Jilin University, for sponsoring the conference.