This book constitutes the refereed proceedings of four workshops held at the 25th International Conference on Financial Cryptography and Data Security, FC 2021, held virtually, in March 2021. The workshops are as follows: CoDecFin: The Second Workshop on Coordination of Decentralized Finance DeFi 2021 : First Workshop on Decentralized Finance VOTING 2021: Sixth Workshop on Advances in Secure Electronic Voting WTSC 2021: Fifth Workshop on Trusted Smart Contracts

This double volume constitutes the thoroughly refereed post-conference proceedings of the 25th International Conference on Financial Cryptography and Data Security, FC 2021, held online due to COVID-19, in March 2021. The 47 revised full papers and 4 short papers together with 3 as Systematization of Knowledge (SoK) papers were carefully selected and reviewed from 223 submissions. The accepted papers were organized according to their topics in 12 sessions: Smart Contracts, Anonymity and Privacy in Cryptocurrencies, Secure Multi-Party Computation, System and Application Security, Zero-Knowledge Proofs, Blockchain Protocols, Payment Channels, Mining, Scaling Blockchains, Authentication and Usability, Measurement, and Cryptography.

This double volume constitutes the thoroughly refereed post-conference proceedings of the 25th International Conference on Financial Cryptography and Data Security, FC 2021, held online due to COVID-19, in March 2021. The 47 revised full papers and 4 short papers together with 3 as Systematization of Knowledge (SoK) papers were carefully selected and reviewed from 223 submissions. The accepted papers were organized according to their topics in 12 sessions: Smart Contracts, Anonymity and Privacy in Cryptocurrencies, Secure Multi-Party Computation, System and Application Security, Zero-Knowledge Proofs, Blockchain Protocols, Payment Channels, Mining, Scaling Blockchains, Authentication and Usability, Measurement, and Cryptography.

This double volume constitutes the thoroughly refereed post-conference proceedings of the 25th International Conference on Financial Cryptography and Data Security, FC 2021, held online due to COVID-19, in March 2021. The 47 revised full papers and 4 short papers together with 3 as Systematization of Knowledge (SoK) papers were carefully selected and reviewed from 223 submissions. The accepted papers were organized according to their topics in 12 sessions: Smart Contracts, Anonymity and Privacy in Cryptocurrencies, Secure Multi-Party Computation, System and Application Security, Zero-Knowledge Proofs, Blockchain Protocols, Payment Channels, Mining, Scaling Blockchains, Authentication and Usability, Measurement, and Cryptography.

This book constitutes revised selected papers from the workshops that were affiliated with the 26th International Conference on Financial Cryptography and Data Security, FC 2022, which was held in Grenada during May 2022. FC 2022 presents the following four workshops: CoDecFin 2022: 3rd Workshop on Coordination of Decentralized Finance DeFi 2022: 2nd Workshop on Decentralized FinanceVoting 2022: 7th Workshop on Advances in Secure Electronic VotingWTSC 2022: 6th Workshop on Trusted Smart Contracts

​This book constitutes the revised selected papers from the workshops affiliated with the 27th International Conference on Financial Cryptography and Data Security, FC 2023, which took place in Bol, Brač, Croatia, in May 2023. The 7 full papers presented in this book were carefully reviewed and selected from 18 submissions. They stem from the following workshops:CoDecFin 2022: 3rd Workshop on Coordination of Decentralized Finance DeFi 2022: 2nd Workshop on Decentralized FinanceVoting 2022: 7th Workshop on Advances in Secure Electronic VotingWTSC 2022: 6th Workshop on Trusted Smart Contracts/div

The two-volume set LNCS 13950 and 13951 constitutes revised selected papers from the 27th International Conference on Financial Cryptography and Data Security, FC 2023, which was held from May 1-5, 2023, in Bol, Croatia. The 39 full and 2 short papers presented in these proceedings were carefully reviewed and selected from 182 submissions. They were organized in topical sections as follows:Part I: Consensus; cryptographic protocols; decentralized finance; Part II: Proof of X; Layer 2; attack techniques, defenses, and attack case studies; empirical studies and more decentralized finance; game theory and protocols.