Imperial College London

Alexei Zamyatin

Faculty of EngineeringDepartment of Computing

Research Assistant



alexei.zamyatin17 Website




358ACE ExtensionSouth Kensington Campus





I'm a research assistant and PhD student at the Imperial College London Centre for Cryptocurrency Research and Engineering. My research focuses on trustless and scalable cross-chain communication protocols under the supervision of Professor William Knottenbelt and Dr Arthur Gervais, funded by Blockchain (GB) Ltd.

My research interests include security, sustainability and scalability of proof-of-work blockchains, as well as cross-blockchain information and asset exchange. Recent work also includes empirical analysis of blockchain data, evaluation of fairness in mining pools and modeling of miner behavior. I'm also interested in blockchain sharding proposals and non-intrusive protocol update mechanisms for permissionless blockchains.


Interoperability with Cryptocurrency-backed Tokens, Scaling Bitcoin "Kaizen", Tokyo, October 2018. Slides, Video.

Multisignatures for Cryptocurrency-Backed Tokens (Poster), 2nd International Workshop on Cryptocurrencies and Blockchain Technology - CBT'18, Barcelona, Spain, September 2018. Slides

Velvet Forks, Building on Bitcoin Conference, Lisbon, June 2018. Slides

Revisiting Near Blocks for PoW Blockchains (Lightning Talk), Summer Research Institute - École polytechnique fédérale de Lausanne, Lausanne, June 2018. Slides

Blockchain Interoperability (Lightning Talk), Dagstuhl Seminar 18152, Blockchains, Smart Contracts and Future Applications, Dagstuhl, Germany, April 2018. Slides

Towards a Generalised Blockchain Fabric, Code Block 2018 hosted by, March 2018. Slides

Selected Publications

Journal Articles

Stewart I, Illie D, Zamyatin A, et al., Committing to Quantum Resistance: A Slow Defence for Bitcoin against a Fast Quantum Computing Attack, Royal Society Open Science, ISSN:2054-5703


Zamyatin A, Stifter N, Judmayer A, et al., (Short Paper) A Wild Velvet Fork Appears! Inclusive Blockchain Protocol Changes in Practice, 5th Workshop on Bitcoin and Blockchain Research at Financial Cryptography and Data Security 2018

Judmayer A, Zamyatin A, Stifter N, et al., Merged Mining: Curse or Cure?, 1st International Workshop on Cryptocurrencies and Blockchain Technology (CBT'17), Pages:316-316

Zamyatin A, Wolter K, Werner S, et al., 2017, Swimming with Fishes and Sharks: Beneath the Surface of Queue-based Ethereum Mining Pools, 25th IEEE International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS), IEEE COMPUTER SOC, Pages:99-109, ISSN:1526-7539


Zamyatin A, Harz D, Lind J, et al., 2018, XCLAIM: A Framework for Blockchain Interoperability

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