Yunqi Li (@lilioneviola) profile picture

Yunqi Li

@lilioneviola
Joined September 2014
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Yunqi Li retweeted
IC3 (@initc3org) profile picture
IC3
@initc3org12 Jun 2023
New Research！TEEs are a growing part of block-building supply chains in today's #blockchains, but past vulnerabilities raise concerns. IC3's new work The Sting Framework offers powerful protective layer for TEE-based systems and other that needs secrecy. link.medium.com/AMttHrUvzAb

The Sting Framework (SF)

v1.0

link.medium.com
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The most interesting part: How does knowing the Stinger prove the existence of a subversion channel? After all, *everyone* sees the tx once the block is published. In other words, this app only provides temporary privacy. The Informer must prove they have *early* knowledge...🤔🤔
Ari Juels (@AriJuels) profile pictureAri Juels@AriJuels12 Jun 2023
Replying to @AriJuels
We've prototyped SF for Flashbots' SGX Builder*, a TEE-based block-builder. A stinger is in this case a secret tx. If someone can learn the tx before the block is built and inject a fingerprint of the tx into the block, that's a proof of tx data leakage (with provisos).
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The clever idea here is to have the Informer create a *second* bundle encoding a commitment to the Stinger and make both bundles appear in the *same block*. This is the evidence that the Subversion Service violated pre-trade privacy.
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Yunqi Li retweeted
IC3 (@initc3org) profile picture
IC3
@initc3org21 Apr 2021
New IC3 blog post by @lilioneviola, @sbellem, @badcryptobitch, @socrates1024 The authors show how to provide privacy for smart contracts in a general purpose way using MPC as a sidechain. They demo by using MPC for a confidential AMM. bit.ly/3sz9seV
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