# coincurve

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This library provides well-tested Python bindings for [libsecp256k1][], the heavily optimized
C library used by [Bitcoin Core][] for operations on the elliptic curve [secp256k1][].

## Features

- Fastest available implementation (more than 10x faster than OpenSSL)
- Clean, easy to use API
- Frequent updates from the development version of [libsecp256k1][]
- Linux, macOS, and Windows all have binary packages for multiple architectures
- Linux & macOS use GMP for faster computation
- Deterministic signatures as specified by [RFC 6979][]
- Non-malleable signatures (lower-S form) by default
- Secure, non-malleable [ECDH][] implementation

## Users

- [Ethereum](https://ethereum.org)
- [LBRY](https://lbry.com)
- [ZeroNet](https://zeronet.io)
- [libp2p](https://libp2p.io)

and [many more](users.md)!

## License

`coincurve` is distributed under the terms of any of the following licenses:

- [MIT](https://spdx.org/licenses/MIT.html)
- [Apache-2.0](https://spdx.org/licenses/Apache-2.0.html)

## Navigation

Desktop readers can use keyboard shortcuts to navigate.

| Keys | Action |
| --- | --- |
| <ul><li><kbd>,</kbd> (comma)</li><li><kbd>p</kbd></li></ul> | Navigate to the "previous" page |
| <ul><li><kbd>.</kbd> (period)</li><li><kbd>n</kbd></li></ul> | Navigate to the "next" page |
| <ul><li><kbd>/</kbd></li><li><kbd>s</kbd></li></ul> | Display the search modal |