# @semaphore-protocol/identity

> A library to create Semaphore identities.

Latest version **4.14.3** (published 2026-07-08) · MIT license · 0 weekly downloads

## Install

```sh
npm install @semaphore-protocol/identity
pnpm add @semaphore-protocol/identity
yarn add @semaphore-protocol/identity
bun add @semaphore-protocol/identity
```

## Health

**Score 65/100 (B)** — status: active.

Positive: has types; esm support; no vulnerabilities; recently updated; high maintenance score.

Warnings: low downloads.

## Facts

| | |
|---|---|
| Version | 4.14.3 |
| Published | 2026-07-08 |
| First published | 2022-06-02 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | bundled |
| Module format | ESM + CommonJS |
| Dependencies | 4 |
| Unpacked size | 30 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 1085 |
| Maintainers | vplasencia, johnguilding, errmac, nicoserranop |

## Links

- npm: https://www.npmjs.com/package/@semaphore-protocol/identity
- Repository: https://github.com/semaphore-protocol/semaphore
- Homepage: https://github.com/semaphore-protocol/semaphore/tree/main/packages/identity
- Issues: https://github.com/semaphore-protocol/semaphore.git/issues
- npm.io page: https://npm.io/package/@semaphore-protocol/identity

## Dependencies (4)

- [@zk-kit/utils](https://npm.io/package/@zk-kit/utils.md) 1.3.0
- [poseidon-lite](https://npm.io/package/poseidon-lite.md) 0.3.0
- [@zk-kit/baby-jubjub](https://npm.io/package/@zk-kit/baby-jubjub.md) 1.0.3
- [@zk-kit/eddsa-poseidon](https://npm.io/package/@zk-kit/eddsa-poseidon.md) 1.0.4

## Recent versions

- 4.14.3 (latest) — 2026-07-08
- 4.14.2 — 2026-01-23
- 4.14.1 — 2026-01-19
- 4.14.0 — 2025-10-27
- 4.13.2 — 2025-10-13
- 4.13.1 — 2025-09-08
- 4.13.0 — 2025-08-27
- 4.13.0-beta.1 — 2025-07-23
- 4.13.0-beta.0 — 2025-07-22
- 4.12.1 — 2025-07-21
- 4.12.0 — 2025-07-17
- 4.11.1 — 2025-05-21
- 4.11.0 — 2025-05-20
- 4.10.0 — 2025-05-06
- 4.9.2 — 2025-03-31
- … 96 more at https://npm.io/package/@semaphore-protocol/identity/versions

## README

<p align="center">
    <h1 align="center">
        Semaphore identity
    </h1>
    <p align="center">A library to create Semaphore identities.</p>
</p>

<p align="center">
    <a href="https://github.com/semaphore-protocol">
        <img src="https://img.shields.io/badge/project-Semaphore-blue.svg?style=flat-square">
    </a>
    <a href="https://github.com/semaphore-protocol/semaphore/blob/main/LICENSE">
        <img alt="NPM license" src="https://img.shields.io/npm/l/%40semaphore-protocol%2Fidentity?style=flat-square">
    </a>
    <a href="https://www.npmjs.com/package/@semaphore-protocol/identity">
        <img alt="NPM version" src="https://img.shields.io/npm/v/@semaphore-protocol/identity?style=flat-square" />
    </a>
    <a href="https://npmjs.org/package/@semaphore-protocol/identity">
        <img alt="Downloads" src="https://img.shields.io/npm/dm/@semaphore-protocol/identity.svg?style=flat-square" />
    </a>
    <a href="https://js.semaphore.pse.dev/modules/_semaphore_protocol_identity">
        <img alt="Documentation typedoc" src="https://img.shields.io/badge/docs-typedoc-744C7C?style=flat-square">
    </a>
    <a href="https://eslint.org/">
        <img alt="Linter eslint" src="https://img.shields.io/badge/linter-eslint-8080f2?style=flat-square&logo=eslint" />
    </a>
    <a href="https://prettier.io/">
        <img alt="Code style prettier" src="https://img.shields.io/badge/code%20style-prettier-f8bc45?style=flat-square&logo=prettier" />
    </a>
</p>

<div align="center">
    <h4>
        <a href="https://github.com/semaphore-protocol/semaphore/blob/main/CONTRIBUTING.md">
            👥 Contributing
        </a>
        <span>&nbsp;&nbsp;|&nbsp;&nbsp;</span>
        <a href="https://github.com/semaphore-protocol/semaphore/blob/main/CODE_OF_CONDUCT.md">
            🤝 Code of conduct
        </a>
        <span>&nbsp;&nbsp;|&nbsp;&nbsp;</span>
        <a href="https://github.com/semaphore-protocol/semaphore/contribute">
            🔎 Issues
        </a>
        <span>&nbsp;&nbsp;|&nbsp;&nbsp;</span>
        <a href="https://semaphore.pse.dev/telegram">
            🗣️ Chat &amp; Support
        </a>
    </h4>
</div>

| This library provides a class that can be used to create identities compatible with the Semaphore [circuits](https://github.com/semaphore-protocol/semaphore/tree/main/circuits). Each identity contains an [EdDSA](https://www.rfc-editor.org/rfc/rfc8032) private key, its public key, and the identity commitment, which is the [Poseidon](https://eprint.iacr.org/2019/458.pdf) hash of the public key. |
| ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

## 🛠 Install

### npm or yarn

Install the `@semaphore-protocol/identity` package with npm:

```bash
npm i @semaphore-protocol/identity
```

or yarn:

```bash
yarn add @semaphore-protocol/identity
```

## 📜 Usage

For more information on the functions provided by `@semaphore-protocol/identity`, please refer to the [TypeDoc documentation](https://js.semaphore.pse.dev/modules/_semaphore_protocol_identity).

\# **new Identity**(privateKey?: _BigNumberish_): _Identity_

```typescript
import { Identity } from "@semaphore-protocol/identity"

// The identity will be generated randomly.
const { privateKey, publicKey, commitment } = new Identity()

// Alternatively, you can pass your private key.
const identity = new Identity("your-private-key")
```

\# **identity.export**(): _string_

```typescript
import { Identity } from "@semaphore-protocol/identity"

const identity = new Identity()

const privateKey = identity.export()
```

\# **identity.import**(privateKey: _string_): _Identity_

```typescript
import { Identity } from "@semaphore-protocol/identity"

const identity = new Identity()

const privateKey = identity.export()

const identity2 = Identity.import(privateKey)
```

\# **identity.signMessage**(message: _BigNumberish_): _Signature\<string>_

```typescript
import { Identity } from "@semaphore-protocol/identity"

const message = "message"
const identity = new Identity()

const signature = identity.signMessage(message)
```

\# **Identity.verifySignature**(message: _BigNumberish_, signature: _Signature_, publicKey: _Point_): _boolean_

```typescript
import { Identity } from "@semaphore-protocol/identity"

const message = "message"
const identity = new Identity()

const signature = identity.signMessage(message)

Identity.verifySignature(message, signature, identity.publicKey)
```

\# **Identity.generateCommitment**(publicKey: _Point_): _bigint_

```typescript
import { Identity } from "@semaphore-protocol/identity"

Identity.generateCommitment(identity.publicKey)
```

---
_Source: https://npm.io/package/@semaphore-protocol/identity · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._