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%.

This book constitutes the thoroughly refereed post-proceedings of the 7th International Symposium on Privacy Enhancing Technologies, PET 2007, held in Ottawa, Canada, in June 2007 in conjunction with WOTE 2007, the IAVoSS Workshop on Trustworthy Elections.

The 16 revised full papers presented were carefully selected from 84 submissions during two rounds of reviewing and improvement. The papers - both from academia and industry - cover design and realization of privacy services for the internet and other communication networks and present novel research on all theoretical and practical aspects of privacy technologies, as well as experimental studies of fielded systems.

This book constitutes the thoroughly refereed post-proceedings of the 6th International Workshop on Privacy Enhancing Technologies, PET 2006, held in Cambridge, UK, in June 2006 co-located with WEIS 2006, the Workshop on the Economics of Information Security, and WOTE 2006, the IAVoSS Workshop On Trustworthy Elections. The 24 revised full papers present novel research on all theoretical and practical aspects of privacy technologies.