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Aviv Yaish Profile picture
Aviv Yaish
@yaish_aviv
I research cryptocurrencies @ The Hebrew University.
Jun 17, 2023 • 15 tweets • 4 min read
Block proposers speculatively execute transactions when creating blocks to maximize their profits.
How can this go wrong?
In "Speculative Denial-of-Service Attacks in Ethereum", we show that speculative execution allows attackers to cheaply DoS the network.
Read the thread! 1/15 Image 2/15 Joint work with @KaihuaQIN, @lzhou1110, @Avivz78, @HatforceSec.
Full paper: researchgate.net/publication/37…
Aug 5, 2022 • 12 tweets • 3 min read
Do miners execute consensus-level attack against Ethereum (or other major tokens)❓🤔
The answer is *yes*❗🤯
Read on for full deets 👇
Joint work with Gilad Stern and @Avivz78.
Full paper: dx.doi.org/10.13140/RG.2.…
Medium post: medium.com/@aviv.yaish/un…
... (1/12) (2/12) In Ethereum, the difficulty of mining the current block changes on-the-fly and decreases the longer the time that has passed without anyone mining a new valid block; this is done to ensure that inter-block time will not be too high, in expectation. What could go wrong? ...