This book constitutes the thoroughly refereed post-conference proceedings of the 13th International Conference on Financial Cryptography and Data Security, FC 2009, held in Accra Beach, Barbados, in February 2009.

The 20 revised full papers and 1 revised short papers presented together with 1 panel report and 1 keynote address were carefully reviewed and selected from 91 submissions. The papers are organized in topical sections on economics of information security, anonymity and privacy, private computation, authentication and identification, fraud detection and auctions.