Iddo Bentov, Ariel Gabizon, Alex Mizrahi. Cryptocurrencies Without Proof of Work. In Jeremy Clark, Sarah Meiklejohn, Peter Y. A. Ryan, Dan S. Wallach, Michael Brenner, Kurt Rohloff, editors, Financial Cryptography and Data Security - FC 2016 International Workshops, BITCOIN, VOTING, and WAHC, Christ Church, Barbados, February 26, 2016, Revised Selected Papers. Volume 9604 of Lecture Notes in Computer Science, pages 142-157, Springer, 2016. [doi]