This book constitutes the thoroughly refereed post-conference proceedings of the 21st
International Conference on Financial Cryptography and Data Security FC 2017 held in Sliema
Malta in April 2017. The 30 revised full papers and 5 short papers were carefully selected and
reviewed from 132 submissions. The papers are grouped in the following topical sections:
Privacy and Identity Management Privacy and Data Processing Cryptographic Primitives and
API's Vulnerabilities and Exploits Blockchain Technology Security of Internet Protocols
Blind signatures Searching and Processing Private Data Secure Channel Protocols and Privacy
in Data Storage and Retrieval.
