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YouTube

Multiple Bugs in Multi-Party Computation - Breaking Cryptocurrency's Strongest Wallets

Black Hat via YouTube

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Overview

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This talk examines how multi-party computation and threshold-signature schemes secure enterprise cryptocurrency wallets, then presents practical attacks against their protocols, including key rotation and signing.

Syllabus

Intro
The speakers
What's a wallet?
Enterprise wallets
Distributing trust
Multi-party computation (MPC)
Threshold signatures (TSS)
Distributed key generation
Commitments
Threshold secret-sharing
Zero-knowledge proofs
Setup
Attacker Model
Our attacks
Attacks taxonomy
Lather, Rinse, Repeat
Golden Shoe
Minimize complexity
Careful with academic papers
Should I use MPC and TSS?

Taught by

Black Hat

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