Financial Cryptography and Data Security FC 2019 International Workshops, VOTING and WTSC, St. Kitts, St. Kitts and Nevis, February 18–22, 2019, Revised Selected Papers

Two-Party State Channels with State Assertions.- Secure Offline Payments in Bitcoin.- Proof-of-Work Sidechains.- You Sank my Battleship! A Case Study to Evaluate State Channels as a Scaling Solution for Cryptocurrencies.- Game-theoretic Analysis of an Incentivized Verifiable Computation System.- Sluggish Mining: Profiting from the Verier's Dilemma.- Deploying PayWord on Ethereum.- SoK: Development of Secure Smart Contracts - Lessons from a Graduate Course.- Verification-Led Smart Contracts.- A Java Framework for Smart Contracts.- Is Solidity solid enough.- Building Executable Secure Design Models for Smart Contracts with Formal Methods.- SoK: Transparent Dishonesty: Front-running Attacks on Blockchain.- Trustee: Full Privacy Preserving Vickrey Auction on top of Ethereum.- Election Manipulation 100.- A Manifest Improvement for Risk-Limiting Audits.- k-Cut: A Simple Approximately-Uniform Method for Sampling Ballots in Post-Election Audits.- How to Assess the Usability Metrics inE-Voting Schemes.- Improving the Performance of Cryptographic Voting Protocols (SoK).- Short Paper: Coercion-Resistant Voting in Linear Time via Fully Homomorphic Encryption.- Priv-Apollo - Secret Ballot E2E-V Internet Voting.- End-to-End Verifiable Quadratic Voting with Everlasting Privacy.- Lattice-Based Proof of a Shuffle.