ZKryptium
Description
ZKryptium offers implementations of the BBS+ and CL2003 signature schemes, enabling the creation of zero-knowledge proofs for both signed attributes and signatures. This library has been designed to expose cryptographic primitives, facilitating the development of a Verifiable Credentials (VCs) system capable of supporting:
- Anonymous Credentials
- Selective Disclosure Credentials
Getting Started
Requirements
- Rust (>= 1.65)
- Cargo (>= 1.65)
- ZKryptium also depends on the Rug crate which depends on GMP, MPFR and MPC libraries through the low-level FFI bindings in the gmp-mpfr-sys crate, which needs some setup to build; the gmp-mpfr-sys documentation has some details on usage under GNU/Linux, macOS and Windows.
Usage
Add this to your Cargo.toml:
[dependencies]
zkryptium = "0.1.6"
Only BBS+:
[dependencies]
zkryptium = { version = "0.1.6", default-features = false, features = ["bbsplus"] }
Only CL2003:
[dependencies]
zkryptium = { version = "0.1.6", default-features = false, features = ["cl03"] }
Examples
Take a look at the examples.
You can run the example based on the BBS+ Signature Scheme with:
cargo run --example bbsplus <ciphersuite>
Available Ciphersuites:
- BLS12-381-SHA-256
- BLS12-381-SHAKE-256
You can run the example based on the CL2003 Signature Scheme with:
cargo run --example cl03 <ciphersuite>
Available Ciphersuites:
- CL1024-SHA-256
Test
To test the library you can launch the test vectors with:
cargo test