This book constitutes the refereed proceedings of the 9th International Conference on Applied Cryptography and Network Security, ACNS 2011, held in Nerja, Spain, in June 2011. The 31 revised full papers included in this volume were carefully reviewed and selected from 172 submissions. They are organized in topical sessions on malware and intrusion detection; attacks, applied crypto; signatures and friends; eclectic assortment; theory; encryption; broadcast encryption; and security services.

This book constitutes the refereed proceedings of the 10th International Conference on Cryptology and Network Security, CANS 2011, held in Sanya, China, in December 2011. The 18 revised full papers, presented were carefully reviewed and selected from 65 submissions. The book also includes two invited talks. The papers are organized in topical sections on symmetric cryptanalysis, symmetric ciphers, public key cryptography, protocol attacks, and privacy techniques.

This book constitutes the refereed proceedings of the 12th International Conference on Practice and Theory in Public-Key Cryptography, PKC 2009, held in Irvine, CA, USA, in March 2009.

The 28 revised full papers presented were carefully reviewed and selected from 112 submissions. The papers are organized in topical sections on number theory, applications and protocols, multi-party protocols, identity-based encryption, signatures, encryption, new cryptosystems and optimizations, as well as group signatures and anonymous credentials.

This volume contains the proceedings of the 12th Financial Cryptography and DataSecurityInternationalConference, heldinCozumel, Mexico, January28-31 2008. Financial cryptography (FC) and data security has been for years the main international forum for research, advanced development, education, exploration, and debate regarding information assurance in the context of ?nance and commerce. Despite the strong competition from other top-tier related security conf- ences, the Program Committee received a signi?cant number of submissions, indicating a growingacceptance of FC as the premier ?nancialand data security forum. The ProgramCommittee, led by the PCChair Gene Tsudik, achievedan excellent program balance between research, practice, and panel sessions. This year the program included two new additions, namely, a short-paper track and a poster session, both extremely well received. Intimate and colorful by tradition, the high-quality program was not the only attraction of FC. In the past, FC conferences have been held in highly research-synergistic locations such as Tobago, Anguilla, Dominica, Key West, Guadeloupe, Bermuda, and the Grand Cayman. In 2008 we continued this t- dition and the conference was located in sunny Cozumel, Mexico. The ongoing carnival, sailing, submarine trips, and Mayan ruins were just a few of the - merous exciteme

It was a pleasure to take part in the 2005 European Workshop on Security and Privacy in Ad Hoc and Sensor Networks (ESAS 2005), held on July 13-14 in Visegrad (Hungary) in conjunction with the First International Conference on Wireless Internet (WICON) . As Program Co-chairs, we are very happy with the outcome of this year's ESAS workshop. It clearly demonstrates the continued importance, popularity andtimeliness oftheworkshop'stopic: securityandprivacy inadhocandsensor networks.Atotalof51fullpapersweresubmitted.Eachsubmissionwasreviewed by at least three expert referees. After a short period of intense discussions and deliberations, the Program Committee selected 17 papers for presentation and subsequent publication in the workshop proceedings. This corresponds to an acceptance rate of 33% - a respectable rate by any measure. First and foremost, we thank the authors of ALL submitted papers. Your con?dence in this venue is much appreciated. We hope that you will continue patronizing ESAS as authors and attendees. We are also very grateful to our colleagues in the research community who served on the ESAS Program C- mittee. Your sel?ess dedication is what makes the workshop a success. Finally, we are very grateful to the ESAS Steering Group: Levente Buttyan, Claude Castelluccia, Dirk Westho? and Susanne Wetzel. They had the vision and the drive to create this workshopin the ?rst place; they also provided many insightsandlotsofhelpwiththisyear'sevent.Weespeciallyacknowledgeand- preciate the work of Levente Buttyan whose dedication (as Steering Committee member, PC member and Local Arrangements Chair) played a very important role in the success of the workshop.