Crypto Wallets Vulnerable to Multi-Party Computation Bugs 🔓

Cryptocurrency wallets in exchange platforms or banks require strong security because they protect vast amounts of money. Some solutions rely on advanced cryptographic methods that distribute trust across multiple parties, in the spirit of Shamir's secret-sharing. These include multi-party computation (MPC) and threshold signature schemes (TSS), which are a special case of MPC to sign data in a distributed, yet trustless manner. TSS has notably been tested and deployed in major organizations where secret key generation and digital signing are needed. But these techniques, although powerful and "magic" on paper, can prove fragile in practice, as this talk will show.

By Omer Shlomovits and Jean-Philippe Aumasson
Full Abstract & Presentation Materials: https://www.blackhat.com/us-20/briefings/schedule/#multiple-bugs-in-multi-party-computation-breaking-cryptocurrencys-strongest-wallets-19763