Aviv Yaish


Bio. I research the intricate relationship between the economics and security of cryptocurrencies. I am currently a PhD candidate at HUJI, a research consultant at Matter Labs, and a visiting researcher at the University of Innsbruck, funded by an AIANI visiting researcher fellowship. Previously, I was the sole lecturer at HUJI for two courses, and received an award for my teaching. Among other honors, I was named one of the top PhD graduates of 23-24 by the CBER Forum, received the CCS Distinguished Paper Award, and was generously supported by an Ethereum Foundation grant, the 4 year merit-based Ze’ev Jabotinsky PhD Fellowship, and HUJI’s rector award for first-in-class MSc students.

If you want to collaborate or discuss my research interests, feel free to get in touch. This includes bright undergrads looking for a tutorial work mentor.


Dec 1, 2023 I received the ACM CCS Distinguished Paper award for my paper Uncle Maker.
Nov 5, 2023 Yuzhe Tang kindly invited me to present Speculative DoS at Syracuse University on Dec. 22.
Sep 29, 2023 I was invited to speak at YoungEC ‘24.
Sep 25, 2023 I will present Speculative DoS at Tokenomics ‘23.
Aug 30, 2023 The Vulnerable Nature of Decentralized Governance in DeFi was accepted to DeFi23.

Selected Papers

  1. Speculative Denial-of-Service Attacks in Ethereum
    Aviv YaishKaihua QinLiyi Zhou, and 2 more authors
    In 33rd USENIX Security Symposium (USENIX Security 24), 2024
  2. Blockchain Censorship
    Anton WahrstätterJens ErnstbergerAviv Yaish, and 8 more authors
    In Proceedings of the 2024 ACM Web Conference, 2024
  3. Uncle Maker: (Time)Stamping Out The Competition in Ethereum
    Aviv YaishGilad Stern, and Aviv Zohar
    In Proceedings of the 2023 ACM SIGSAC Conference on Computer and Communications Security, 2023
  4. The Vulnerable Nature of Decentralized Governance in DeFi
    Maya DotanAviv Yaish, Hsin-Chu Yin, and 2 more authors
    In Proceedings of the 2023 Workshop on Decentralized Finance and Security, 2023
  5. Correct Cryptocurrency ASIC Pricing: Are Miners Overpaying?
    Aviv Yaish, and Aviv Zohar
    In 5th Conference on Advances in Financial Technologies, 2023
  6. Blockchain Stretching & Squeezing: Manipulating Time for Your Best Interest
    Aviv YaishSaar Tochner, and Aviv Zohar
    In Proceedings of the 23rd ACM Conference on Economics and Computation, 2022


  1. Barriers to Collusion-resistant Transaction Fee Mechanisms
    Yotam Gafni, and Aviv Yaish
  2. VoteTiming.png
    Strategic Vote Timing in Online Elections With Public Tallies
    Aviv YaishSvetlana Abramova, and Rainer Böhme
  3. DiscountedTXs.png
    Competitive Revenue Extraction from Time-Discounted Transactions in the Semi-Myopic Regime
    Yotam Gafni, and Aviv Yaish
  4. AirdropsGivingMoney.png
    Airdrops: Giving Money Away Is Harder Than It Seems
    Johnnatan Messias^*, Aviv Yaish^*, and Ben Livshits
    Equal contribution denoted by ^*.
  5. GreedyTFMs.png
    Greedy Transaction Fee Mechanisms for (Non-)myopic Miners
    Yotam Gafni, and Aviv Yaish
    In Annual Conference of the Israeli Chapter of the Game Theory Society, 2023
  6. SuboptimalityDeFi.png
    Suboptimality in DeFi
    Aviv YaishMaya DotanKaihua Qin, and 2 more authors