Protocol Labs Research

Sarah Azouvi

Research Scientist / CryptoNetLab


PhD in Computer Science, 2020 (expected)

University College London

Sarah is a research scientist with interests that lie at the intersection of Applied Cryptography, Distributed Systems, and Game Theory. During her PhD, she mostly worked on decentralized consensus protocols but also looked at other aspects of decentralized systems such as their governance.

Areas of Expertise

Blockchain, Consensus


2020.10.21 / Conference paper
Winkle: foiling long-range attacks in proof-of-stake systems
Winkle protects any validator-based byzantine fault tolerant consensus mechanisms, such as those used in modern Proof-of-Stake blockchains, against long-range attacks where old validators’ signature keys get compromised. Winkle is a decentralized secondary layer of client-based validation, where a client includes a single additional field into a transaction that they sign: a hash of the previously sequenced block.
AFT '20: 2nd ACM Conference on Advances in Financial Technologies / 2020.10.21 / New York, NY, USA
Sarah Azouvi , George Danezis, Valeria Nikolaenko
2020.3.3 / Conference paper
SoK: Tools for game theoretic models of security for cryptocurrencies
Cryptocurrencies have garnered much attention in recent years, both from the academic community and industry. One interesting aspect of cryptocurrencies is their explicit consideration of incentives at the protocol level, which has motivated a large body of work, yet many open problems still exist and current systems rarely deal with incentive related problems well.
Cryptoeconomic Systems / 2020.03.07 / Cambridge, MA, USA
Sarah Azouvi , Alexander Hicks