Practical Key-Extraction Attacks in Leading MPC Wallets

ePrint Report: Practical Key-Extraction Attacks in Leading MPC Wallets

Nikolaos Makriyannis, Oren Yomtov

Multi-Party Computation (MPC) has become a major tool for protecting hundreds of billions of dollars in cryptocurrency wallets. MPC protocols are currently powering the wallets of Coinbase, Binance, Zengo, BitGo, Fireblocks and many other fintech companies servicing thousands of financial institutions and hundreds of millions of end-user consumers.


We present four novel key-extraction attacks on popular MPC signing protocols showing how a single corrupted party may extract …

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