Multi-Party Computation Wallet

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Pronunciation

[muhl-tee par-tee kom-pyoo-TAY-shun woll-it]

Analogy

Like team members each holding part of a safe combination—only together can they open it.

Definition

See : a where signing keys are shared across multiple parties who jointly compute signatures without exposing .

Key Points Intro

MPC wallets provide:

Key Points

Threshold signing: m-of-n collaboration required.

Key share security: No full key ever reconstructed.

Resilience: Tolerates some offline or malicious parties.

Flexibility: Dynamic membership changes.

Example

A DAO uses MPC to require 4-of-7 council members jointly sign treasury transactions.

Technical Deep Dive

Protocols use secure two-party/ multiparty ECDSA or via /Paillier-based zero-knowledge proof rounds. Each party holds a share and exchanges encrypted commitments to compute signature.

Security Warning

Complex setup; malicious participants can stall signing if threshold not met.

Caveat

Requires reliable network connectivity among parties.

Related Terms

MPC Wallet

Key Sharding

TSS Wallet

Shamir Secret Sharing

Blockchain & Cryptocurrency Glossary

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