Lefteris Kokoris Kogias

Research Scientist

I joined Novi in June 2020. I am interested in increasing the digital trust of online information and processes, especially those that impact the physical world. I am working on building a scalable and robust infrastructure for the future decentralized internet focusing on scalable blockchain systems, bias-resistant decentralized randomness generation, secure software update dispersion and novel applications of threshold cryptography and distributed consensus. Prior to Novi, I received my PhD from EPFL working with Prof. Bryan Ford on scalable and confidential blockchains.


  • 2017 IBM PhD Fellow
  • 2018 IBM PhD Fellow


Theory and practice of decentralized and distributed systems

Latest Publications

Trusted Smart Contracts Workshop at Financial Cryptography (FC) - May 12, 2021

Reactive Key-Loss Protection in Blockchains

Sam Blackshear, Konstantinos (Kostas) Chalkias, Panagiotis Chatzigiannis, Riyaz Faizullabhoy, Irakliy Khaburzaniya, Lefteris Kokoris Kogias, Joshua Lind, David Wong, Tim Zakian

CCS - November 3, 2020

Asynchronous Distributed Key Generation for Computationally Secure Randomness, Consensus, and Threshold Signatures

Lefteris Kokoris Kogias, Dahlia Malkhi, Alexander Spiegelman