12 citations · 39 across the 21 of their papers we have counts for
8 papers · 1 filter
Authenticated Data Structures for Dynamic Workloads
Ziheng Shangguan, Aviv Yaish, Dahlia Malkhi
We introduce the Huffman-Merkle Tree (HMT), an authenticated data structure (ADS) for dynamic workloads where items may differ in access frequencies, and access frequencies can cha…
Perils of Parallelism: Transaction Fee Mechanisms under Execution Uncertainty
Sarisht Wadhwa, Aviv Yaish, Fan Zhang +1
Modern blockchains increasingly rely on parallel execution to improve throughput. We show several industry and academic transaction fee mechanisms (TFMs) struggle to simultaneously…
Persistent BitTorrent Trackers
François-Xavier Wicht, Zhengwei Tong, Shunfan Zhou +2
Private BitTorrent trackers enforce upload-to-download ratios to prevent free-riding, but suffer from three critical weaknesses: reputation cannot move between trackers, centralize…
Insecurity Through Obscurity: Veiled Vulnerabilities in Closed-Source Contracts
Sen Yang, Kaihua Qin, Aviv Yaish +1
Most blockchains cannot hide the binary code of programs (i.e., smart contracts) running on them. To conceal proprietary business logic and to potentially deter attacks, many smart…
Airdrops: Giving Money Away Is Harder Than It Seems
Johnnatan Messias, Aviv Yaish, Benjamin Livshits
Airdrops are a popular mechanism used by blockchain protocols to bootstrap communities, reward early adopters, and decentralize token distribution. Despite their widespread adoptio…
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…
Blockchain Censorship
Anton Wahrstätter, Jens Ernstberger, Aviv Yaish +8
Permissionless blockchains promise to be resilient against censorship by a single entity. This suggests that deterministic rules, and not third-party actors, are responsible for de…
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…