On 26 February 2016 the 3rd workshop on Bitcoin and Blockchain Research in association with Financial Cryptography 2016 took place in Barbados. This workshop aims to bring together researchers interested in cryptocurrencies to present their latest work and discuss together the future of Bitcoin. The program chairs were Sarah Meiklejohn from University College London and Jeremy Clark from Concordia University. The themes addressed during the workshop included blockchain architecture, anonymity, and proof of work alternatives. This event was also a great way for researchers with similar interests to network and share their ideas.
The workshop consisted of 2 keynotes and 4 plenary sessions: Bitcoin network analysis, Enhancing Bitcoin, Ethereum, and Blockchain Architecture.
Nathaniel Popper kicked off the day with a keynote presentation. Nathaniel is a journalist from the New York Times and author of the book ‘Digital Gold: The Untold story of Bitcoin’. He went on to speak about the history of Bitcoin covering Silk Road, Mt Gox, as well as the role of governments.
Then the first session, about Bitcoin network analysis, included two talks. The first one, Stressing Out: Bitcoin Stress Testing, by Khaled Baqer et al., was about DoS attack on Bitcoin, and was presented by Ross Anderson due to visa issues. The second one was Why buy when you can rent? Bribery attacks on Bitcoin-style consensus, by Joseph Bonneau on bribery attacks and cloud mining.
The next session, Enhancing Bitcoin, started with a talk by Ethan Heilman, Blindly Signed Contracts: Anonymous On-Blockchain and Off-Blockchain Bitcoin Transactions, on how to enhance Bitcoin anonymity. Then Mathieu Turuani gave a talk on Automated Verification of Electrum wallet, followed by Aggelos Kiayias on Proof of Proof of Work. Today many light-weight clients use SPV verification instead of full verification. Is it possible to have an even lighter verification? They introduce a modification of the Bitcoin blockchain protocol with sublinear complexity in the length of the chain.