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Adversarial Machine Learning Research with Florian Tramèr

Zero Knowledge

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The Side Channel Attacks and Privacy Tokens

Zcash was built on the original Bitcoin design which was not meant to be an anonymous cryptocurrency. And so there were a lot of things that Bitcoin nodes do that are perfectly fine within the threat model of Bitcoin but suddenly not fine at all once you're moving to Zcash. So in Zcash when I want to send you a transaction I'm essentially going to encrypt this transaction in such a way that only you can decrypt it and sort of find the coin that is spent. That's kind of point number one. Point number two is that the Bitcoin client processes transactions one after the other in a single thread of execution. This is essentially all you need for the attack. We then extended these attacks

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