Curv contains an extremly simple interface to onboard new elliptic curves. Use this library for general purpose elliptic curve cryptography.
The library has a built in support for some useful operations/primitives such as verifiable secret sharing, commitment schemes, zero knowledge proofs, and simple two party protocols such as ECDH and coin flip. The library comes with serialize/deserialize support to be used in higher level code to implement networking.
Currently Supported Elliptic Curves
|Curve||low level library||curve description||blockchain usage examples|
|Secp256k1||rust-secp256k1||bitcoin wiki||Bitcoin, Ethereum|
|Ed25519||cryptoxide||BDLSY11||Ripple, Tezos, Cardano|
|Jubjub||librustzcash||what is jubjub||Zcash|
|Ristretto||curve25519-dalek||ristretto group||not yet ;)|
The code was reviewed independently by few other cryptographers. Special thanks goes to Claudio Orlandi from Aarhus University.
In general security of the library is strongly dependent on the security of the low level libraries used. We chose only libraries that are used as part of other big projects and went through heavy audit/review.
The library is not immune to side channel attacks but considerable effort was given to try and catch as many such attacks as possible (see audit report).
cargo build will build the library only for
BigInt (used for example in rust-paillier). To add opertions for one of the elliptic curves
a feature must be specified:
cargo build --features=ec_secp256k1for secp256k1
cargo build --features=ec_ed25519for ed25519
cargo build --features=ec_jubjubfor jubjub
cargo build --features=ec_ristrettofor ristretto
The library includes some basic examples to get you going. To run them:
cargo run --example EXAMPLE_NAME --features CURVE_NAME
cargo run --example proof_of_knowledge_of_dlog --features ec_jubjub
Docs are built per elliptic curve, use
cargo doc --no-deps --features CURVE_NAME.
cargo doc --no-deps --features ec_ed25519
Adding New Elliptic Curve
To add support for new elliptic curve simply fill in the
Curv is released under the terms of the MIT license. See LICENSE for more information.
The contribution workflow is described in CONTRIBUTING.md.
For any questions, feel free to email us.