40 citations · 170 across the 19 of their papers we have counts for
13 papers · 1 filter
AetherWeave: Sybil-Resistant Robust Peer Discovery with Stake
Kaya Alpturer, Constantine Doumanidis, Aviv Zohar
Peer-discovery protocols within P2P networks are often vulnerable: because creating network identities is essentially free, adversaries can eclipse honest nodes or partition the ov…
The Vulnerable Nature of Decentralized Governance in DeFi
Maya Dotan, Aviv Yaish, Hsin-Chu Yin +2
Decentralized Finance (DeFi) platforms are often governed by Decentralized Autonomous Organizations (DAOs) which are implemented via governance protocols. Governance tokens are dis…
Nakamoto Consensus under Bounded Processing Capacity
Lucianna Kiffer, Joachim Neu, Srivatsan Sridhar +2
For Nakamoto's longest-chain consensus protocol, whose proof-of-work (PoW) and proof-of-stake (PoS) variants power major blockchains such as Bitcoin and Cardano, we revisit the cla…
Sliding Window Challenge Process for Congestion Detection
Ayelet Lotem, Sarah Azouvi, Patrick McCorry +1
Many prominent smart-contract applications such as payment channels, auctions, and voting systems often involve a mechanism in which some party must respond to a challenge or appea…
Flood & Loot: A Systemic Attack On The Lightning Network
Jona Harris, Aviv Zohar
The Lightning Network promises to alleviate Bitcoin's known scalability problems. The operation of such second layer approaches relies on the ability of participants to turn to the…
Pricing ASICs for Cryptocurrency Mining
Aviv Yaish, Aviv Zohar
Cryptocurrencies that are based on Proof-of-Work (PoW) often rely on special purpose hardware to perform so-called mining operations that secure the system, with miners receiving f…
Congestion Attacks in Payment Channel Networks
Ayelet Mizrahi, Aviv Zohar
Payment channel networks provide a fast and scalable solution to relay funds, acting as a second layer to slower and less scalable blockchain protocols. In this paper, we present a…
Hijacking Routes in Payment Channel Networks: A Predictability Tradeoff
Saar Tochner, Stefan Schmid, Aviv Zohar
Off-chain transaction networks can mitigate the scalability issues of today's trustless electronic cash systems such as Bitcoin. However, these peer-to-peer networks also introduce…
How to Pick Your Friends - A Game Theoretic Approach to P2P Overlay Construction
Saar Tochner, Aviv Zohar
A major limitation of open P2P networks is the lack of strong identities. This allows any agent to attack the system by creating multiple false personas, thereby disrupting the ove…
How to Charge Lightning: The Economics of Bitcoin Transaction Channels
Simina Brânzei, Erel Segal-Halevi, Aviv Zohar
Off-chain transaction channels represent one of the leading techniques to scale the transaction throughput in cryptocurrencies. However, the economic effect of transaction channels…
Redesigning Bitcoin's fee market
Ron Lavi, Or Sattath, Aviv Zohar
The Bitcoin payment system involves two agent types: Users that transact with the currency and pay fees and miners in charge of authorizing transactions and securing the system in…
Bitcoin's Security Model Revisited
Yonatan Sompolinsky, Aviv Zohar
We revisit the fundamental question of Bitcoin's security against double spending attacks. While previous work has bounded the probability that a transaction is reversed, we show t…
Optimal Selfish Mining Strategies in Bitcoin
Ayelet Sapirshtein, Yonatan Sompolinsky, Aviv Zohar
Bitcoin is a decentralized crypto-currency, and an accompanying protocol, created in 2008. Bitcoin nodes continuously generate and propagate blocks---collections of newly approved…