Financial Cryptography 2020 Recap

Summary: Trail of Bits attended the 24th Financial Cryptography conference and the Workshop on Trusted Smart Contracts, where it presented work on smart contract bug categorization and a poster on Echidna. The recap highlights papers including two safety attacks on NEO's dBFT consensus protocol, a Moscow on-chain election system whose 256-bit ElGamal keys were too small and which leaked one bit of information enough to identify a voter's candidate choice, and a balance lockdown attack on the Bitcoin Lightning Network.
Why it matters: The Moscow election paper found that a one-bit leak was enough to identify a voter's choice of candidate, and the developers had to rewrite most of the codebase and remove on-chain encryption just before the election.

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