The second Privacy Enhancing Technologies workshop (PET2002), held April 14-15, 2002 in San Francisco, California, continued the enthusiasm and quality of the ?rst workshop in July 2000 (then called "Designing Privacy Enhancing Technologies: Design Issues in Anonymity and Unobservability," LNCS 2009). The workshop focused on the design and realization of anonymity and an- censorship services for the Internet and other communication networks. For c- venienceitwasheldattheCathedralHillHoteljustpriortotheTwelfthConf- ence on Computers, Freedom, and Privacy (CFP2002), but it was not formally a?liated with that conference. There were 48 submissions of which we accepted 17. The program committee listed on the next page made the di?cult decisions on which papers to accept, with additional reviewing help from Oliver Berthold, Sebastian Clauss, Lorrie Cranor, Stefan K.. opsell, Heinrich Langos, Nick Mathewson, and Sandra Ste- brecher. Thanks to all who helped and apologies to anyone we have overlooked. Thanks also to everyone who contributed a submission.Besides the contributed papers we were honored to have an invited talk by someone who as much as anyone could be said to have started the entire technology ?eld of anonymity and privacy: David Chaum. The talk covered his recently developed voting technology based on visual secret sharing, and as if thatweren'tenough,alsodescribednewprimitivesforelectroniccash.Therewas also a lively rump session, covering a variety of new and upcoming technologies.

PET 2003 was the 3rd Workshop on Privacy Enhancing Technologies. It all startedin2000withHannesFederrathorganizing"DesigningPrivacyEnhancing Technologies: Workshop on Design Issues in Anonymity and Unobservability," July 25-26, 2000, held at the Computer Science Institute (ICSI), Berkeley, CA (LNCS 2009). Roger Dingledine, Adam Shostack, and Paul Syverson continued in April 2002 in San Francisco (PET 2002, LNCS 2482). This year was Dresden, and as long as the new PET ?eld prospers, we intend to hold this workshop annually. The workshop focused on the design and realization of anonymity and an- censorship services for the Internet and other communication networks. Besides the excellent technical papers, we had four panels, led by Richard Clayton, - drei Serjantov, Marit Hansen, and Allan Friedman. This year we also extended our work-in-progress talk schedule, allowing 24 people from the audience to - troduce a variety of new technologies and perspectives. An event like PET 2003 cannot happen without the work and dedication of many individuals. First we thank the authors, who wrote and submitted 52 full papers.Next the program committee, who wrote 163 reviews and - lected14papersforpresentationandpublication,withadditionalreviewinghelp from Peter Berlich, Oliver Berthold, Steve Bishop, Jan Camenisch, Sebastian Clauss, Allison Clayton, George Danezis, Christian Friberg, Philippe Golle, Mike Gurski, Guenter Karjoth, Dogan Kesdogan, Stefan Kopsell, .. Thomas Kriegelstein, Heinrich Langos, Nick Mathewson, Richard E. Newman, Richard Owens, David Parkes, Peter Pietzuch, Sandra Steinbrecher, Nathalie Weiler, Matthew Wright, and Sheng Zhong.

This volume contains the proceedings of the 13th International Conference on Financial Cryptography and Data Security, held at the Accra Beach Hotel and Resort, Barbados, February 23–26, 2009. Financial Cryptography and Data Security (FC) is a well-established int- national forum for research, advanced development, education, exploration and debate regarding information assurance in the context of ?nance and commerce. The conference covers all aspects of securing transactions and systems. The goal of FC is to bring security and cryptography researchers and pr- titioners together with economists, bankers, and policy makers. This year, we assembled a vibrant program featuring 21 peer-reviewed research paper pres- tations, two panels (on the economics of information security and on authen- cation), and a keynote address by David Dagon. Despite a proliferation of security and cryptography venues, FC continues to receive a large number of high-quality submissions. This year, we received 91 submissions(75full-lengthpapers,15shortpapersand1panel).Eachsubmission was reviewed by at least three reviewers. Following a rigorous selection, ranking and discussion process, the Program Committee accepted 20 full-length papers, 1 short paper and 1 panel. The overall acceptance rate was 24%.

The second Privacy Enhancing Technologies workshop (PET2002), held April 14-15, 2002 in San Francisco, California, continued the enthusiasm and quality of the ?rst workshop in July 2000 (then called "Designing Privacy Enhancing Technologies: Design Issues in Anonymity and Unobservability," LNCS 2009). The workshop focused on the design and realization of anonymity and an- censorship services for the Internet and other communication networks. For c- venienceitwasheldattheCathedralHillHoteljustpriortotheTwelfthConf- ence on Computers, Freedom, and Privacy (CFP2002), but it was not formally a?liated with that conference. There were 48 submissions of which we accepted 17. The program committee listed on the next page made the di?cult decisions on which papers to accept, with additional reviewing help from Oliver Berthold, Sebastian Clauss, Lorrie Cranor, Stefan K.. opsell, Heinrich Langos, Nick Mathewson, and Sandra Ste- brecher. Thanks to all who helped and apologies to anyone we have overlooked. Thanks also to everyone who contributed a submission.Besides the contributed papers we were honored to have an invited talk by someone who as much as anyone could be said to have started the entire technology ?eld of anonymity and privacy: David Chaum. The talk covered his recently developed voting technology based on visual secret sharing, and as if thatweren'tenough,alsodescribednewprimitivesforelectroniccash.Therewas also a lively rump session, covering a variety of new and upcoming technologies.

PET 2003 was the 3rd Workshop on Privacy Enhancing Technologies. It all startedin2000withHannesFederrathorganizing"DesigningPrivacyEnhancing Technologies: Workshop on Design Issues in Anonymity and Unobservability," July 25-26, 2000, held at the Computer Science Institute (ICSI), Berkeley, CA (LNCS 2009). Roger Dingledine, Adam Shostack, and Paul Syverson continued in April 2002 in San Francisco (PET 2002, LNCS 2482). This year was Dresden, and as long as the new PET ?eld prospers, we intend to hold this workshop annually. The workshop focused on the design and realization of anonymity and an- censorship services for the Internet and other communication networks. Besides the excellent technical papers, we had four panels, led by Richard Clayton, - drei Serjantov, Marit Hansen, and Allan Friedman. This year we also extended our work-in-progress talk schedule, allowing 24 people from the audience to - troduce a variety of new technologies and perspectives. An event like PET 2003 cannot happen without the work and dedication of many individuals. First we thank the authors, who wrote and submitted 52 full papers.Next the program committee, who wrote 163 reviews and - lected14papersforpresentationandpublication,withadditionalreviewinghelp from Peter Berlich, Oliver Berthold, Steve Bishop, Jan Camenisch, Sebastian Clauss, Allison Clayton, George Danezis, Christian Friberg, Philippe Golle, Mike Gurski, Guenter Karjoth, Dogan Kesdogan, Stefan Kopsell, .. Thomas Kriegelstein, Heinrich Langos, Nick Mathewson, Richard E. Newman, Richard Owens, David Parkes, Peter Pietzuch, Sandra Steinbrecher, Nathalie Weiler, Matthew Wright, and Sheng Zhong.

This volume contains the proceedings of the 13th International Conference on Financial Cryptography and Data Security, held at the Accra Beach Hotel and Resort, Barbados, February 23–26, 2009. Financial Cryptography and Data Security (FC) is a well-established int- national forum for research, advanced development, education, exploration and debate regarding information assurance in the context of ?nance and commerce. The conference covers all aspects of securing transactions and systems. The goal of FC is to bring security and cryptography researchers and pr- titioners together with economists, bankers, and policy makers. This year, we assembled a vibrant program featuring 21 peer-reviewed research paper pres- tations, two panels (on the economics of information security and on authen- cation), and a keynote address by David Dagon. Despite a proliferation of security and cryptography venues, FC continues to receive a large number of high-quality submissions. This year, we received 91 submissions(75full-lengthpapers,15shortpapersand1panel).Eachsubmission was reviewed by at least three reviewers. Following a rigorous selection, ranking and discussion process, the Program Committee accepted 20 full-length papers, 1 short paper and 1 panel. The overall acceptance rate was 24%.