jwt-tx-builder is an application that allows for anonymous verification of JWT signatures while masking specific claims. It enables verification of JWTs from specific issuers or subsets of domains, as well as verification based on specific claims in the payload. Our core SDK comes with libraries to assist with circuit generation and utility templates for building zero-knowledge JWT applications.
jwt-tx-builder consists of two core packages:
Zero-knowledge circuits for JWT verification, including RSA signature validation and anonymous domain verification. Read more.
TypeScript utilities for generating circuit inputs, handling JWTs, and managing public keys. Read more.
Solidity contracts for on-chain verification of ZK proofs. Read more.
We've built a demo application that uses ZK-JWT to verify Google Sign-In JWTs.
Try it here: jwt.zk.email
This project has not yet been audited. Not intended for production use.
Everything we write is MIT-licensed. Note that circom and circomlib is GPL. Broadly we are pro permissive open source usage with attribution! We hope that those who derive profit from this, contribute that money altruistically back to this technology and open source public goods.