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This book constitutes the thoroughly refereed post-conference proceedings of the 20th International Conference on Financial Cryptography and Data Security, FC 2016, held in Christ church, Barbados, in February 2016.
The 27 revised full papers and 9 short papers were carefully selected and reviewed from 137 full papers submissions. The papers are grouped in the following topical sections: fraud and deception; payments, auctions, and e-voting; multiparty computation; mobile malware; social interaction and policy; cryptanalysis; surveillance and anonymity; Web security and data privacy; Bitcoin mining; cryptographic protocols; payment use and abuse.

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Fraud and deception.- Payments, auctions, and e-voting.- Multiparty computation.- Mobile malware.- Social interaction and policy.- Cryptanalysis.- Surveillance and anonymity.- Web security and data privacy.- Bitcoin mining.- Cryptographic protocols.- Payment use and abuse.

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