bn

This is a pairing cryptography library written in pure Rust. It makes use of the Barreto-Naehrig (BN) curve construction from [BCTV2015] to provide two cyclic groups G₁ and G₂, with an efficient bilinear pairing:

e: G₁ × G₂ → G_T

Security warnings

This library, like other pairing cryptography libraries implementing this construction, is not resistant to side-channel attacks.

Usage

Add the bn crate to your dependencies in Cargo.toml...

[dependencies]
rabe-bn = "0.4.22"

If you prefer borsh instead of serde, you may use the borsh feature. Afterwards add an extern crate declaration to your crate root:

extern crate rabe_bn;

API

• Fr is an element of F_r
• G1 is a point on the BN curve E/Fq : y^2 = x^3 + b
• G2 is a point on the twisted BN curve E'/Fq2 : y^2 = x^3 + b/xi
• Gt is a group element (written multiplicatively) obtained with the pairing function over G1 and G2.

License

Licensed under either of

• MIT license, (LICENSE-MIT or http://opensource.org/licenses/MIT)
• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)

at your option.

Copyright 2016 Zcash Electric Coin Company. The Zcash Company promises to maintain the "bn" crate on crates.io under this MIT/Apache-2.0 dual license.

Authors

• Sean Bowe
• Georg Bramm

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.