Crypt-Keeper (Beta Version)

CryptKeeper is an open-source MIT-licensed browser extension which enables Zero-Knowledge identity management and proof generation. Currently it supports operations for Semaphore gadgets.

Please note that this extension is currently in beta testing. It may not have full functionality or stability. Your participation and feedback will greatly assist us in refining and enhancing the extension.

YouTube: CryptKeeper Demo

Table of Contents

• Description
• Features
• Development

Description

CryptKeeper is a browser extension that offers secure and private identity management and authentication solutions based on zero-knowledge proofs. The @cryptkeeperzk/providers package simplifies the integration of CryptKeeper functionality into applications by providing injected providers.

These injected providers allow applications to establish a connection with the CryptKeeper extension, enabling them to leverage its features and services. The package includes functions for initializing the CryptKeeper provider within the browser extension's InjectedScript and for connecting to CryptKeeper from an application.

Features

1. Identity Secret and Identity Commitment Generation: Generate Semaphore identity secrets and commitments securely.
2. Seamless Connection with Semaphore Identity: Connect seamlessly with your Semaphore identity when interacting with websites and online services.
3. Semaphore Zero-Knowledge Proof (ZK-Proof) Generation: Generate Zero-Knowledge Proofs using the Semaphore library. ZK-Proofs enable you to validate the authenticity of data and assertions without revealing any sensitive information. This feature enhances privacy and security in various cryptographic applications.
4. Rate-Limiting Nullifier (RLN) Zero-Knowledge Proof (ZK-Proof) Generation: Generate Zero-Knowledge Proofs using the RLN JS library. RLN is a zk-gadget/protocol that enables spam prevention in anonymous environments.

Enabling Proof Generation:

Proof generation in the Semaphore library can be enabled in two ways:

1. Providing Merkle Witness Directly: You can generate a proof by directly providing the necessary Merkle witness. This allows you to use pre-computed witness data.
2. Using a Secure Service Address: by providing a secure service address from which the Merkle witness should be obtained

Development

To set up the development environment, follow these steps:

1. pnpm install
2. pnpm run dev
3. Load the dist directory as an unpacked extension in your browser.

Demo

To run the demo, follow these steps:

1. pnpm run dev or pnpm run build
2. pnpm run merkle:start
3. pnpm run demo:start

End-to-End Testing

To run end-to-end tests, follow these steps:

1. Run pnpx playwright install --with-deps chromium to install playwright dependencies
2. Run pnpm install for extension and for demo
3. Make sure you have .env.test file with METAMASK_EXTENSION_ID.
4. METAMASK_EXTENSION_ID can be found in log output for pnpm run e2e. For different environments METAMASK_EXTENSION_ID is also different so we need to specify it explicitly.
5. Run pnpm run build:e2e to build the extension
6. Run pnpm run e2e to run playwright e2e tests