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

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