semaphore-protocol/semaphore

Health v2 · maintenance only

Adoption not part of the score

1082 stars · 297 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Semaphore is a zero-knowledge protocol and toolkit for proving group membership anonymously, letting users cast signals like votes or endorsements without revealing their identity. It ships as off-chain JavaScript/TypeScript libraries, on-chain Solidity verifier contracts, Circom circuits, and a CLI for scaffolding projects.

Use cases

• build anonymous voting on Ethereum
• prove group membership without revealing identity
• prevent double-signaling with nullifiers
• create anonymous feedback or endorsement systems
• manage privacy-preserving Merkle tree groups
• generate and verify zk-SNARK proofs in a dApp

When to choose

• you need anonymous group signals like private voting or whistleblowing on Ethereum
• you want a well-documented, modular zk protocol with libraries, contracts, and a trusted setup already done
• you are building a dApp that needs a generic privacy layer with double-signaling protection

When to avoid

• you need general-purpose zk-SNARK tooling rather than group-membership signaling
• your application is not Ethereum/EVM-based
• you need fully non-anonymous authentication or standard identity management

Facets

library · maturity active

cryptography sdk cli web-framework blockchain privacy security developer-tools zero-knowledge zk-snarks anonymous-voting merkle-tree proof-of-membership monorepo ethereum privacy-preserving typescript javascript nodejs solidity circom

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markdown · JSON · MCP: product_card(name="semaphore-protocol/semaphore")