Clear DefinitionsMulti‑Signature Security Review
1 min read
Pronunciation
[mul-tee sig-nuh-chur si-kyoor-i-tee ri-vyoo]
Analogy
Like auditing a safe with multiple combination dials and keyholders to ensure no single person can open it alone and that emergency access works as intended.
Definition
An assessment focusing on the security of multi‑signature wallet contracts and key management processes, verifying that signature aggregation, threshold parameters, and recovery mechanisms are correctly implemented.
Key Points Intro
Multi‑sig security reviews validate robust co‑signer protocols and contract correctness.
Key Points
Threshold logic: Ensures correct t-of-n enforcement.
Replay protection: Guards against signature reuse across contexts.
Upgrade safety: Verifies admin and recovery paths.
Key compromise: Assesses fallout and rotation procedures.
Example
A firm’s 3-of-5 multisig treasury contract is audited to confirm that only 3 signatures can authorize transfers and that adding or removing signers requires the same threshold.
Technical Deep Dive
Reviewers examine Solidity `isValidSignature()` implementation, check EIP‑1271 compliance, test edge cases via fuzzing, and validate off‑chain key share rotation protocols.
Security Warning
Logical errors in threshold checks can allow unauthorized spending; exhaustive testing is essential.
Caveat
Audit does not cover off‑chain key custody practices; combine with procedural reviews.
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