Semaphore

A privacy gadget for creating anonymous proof of membership on Ethereum.

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Semaphore is a zero-knowledge gadget which allows Ethereum users to prove their membership of a set without revealing their original identity. At the same time, it allows users to signal their endorsement of an arbitrary string. It is designed to be a simple and generic privacy layer for Ethereum DApps. Use cases include private voting, whistleblowing, mixers, and anonymous authentication.

The core of the Semaphore protocol is in the circuit logic. However Semaphore also provides Solidity contracts and JavaScript libraries (i.e. @zk-kit/identity and @zk-kit/protocols) to make the steps for offchain proof creation and onchain verification easier. To learn more about Semaphore visit https://semaphore.appliedzkp.org.

⚠️ Semaphore V2 has not yet been audited. Please do not use it in production.