The library implements the mental poker protocol described in Mental Poker Revisited.

The protocol depends on an elliptic curve, without further requirements such as high 2-adicity of its scalar field or being pairing-friendly. This allows it to run in diverse environments, such as L2s and SNARKs.

A series of posts explaining the protocol and our approach to implementing it are available in the Geometry Notebook. Part 1 covers the protocol and primitives from a high level, Part 2 goes into some of the math.

This library is developed as part of the collaboration between Geometry and Matchbox, and is designated as Geometry - MatchBox Proof 1.

An example showing how to encode, hide, shuffle and distribute cards is provided under mental-poker/barnett-smart-card-protocol/examples/round.rs. Run the example by running:

cargo run --example round

© 2022 Geometry.

This project is licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE)
• MIT license (LICENSE-MIT)

at your option.

The SPDX license identifier for this project is MIT OR Apache-2.0.