This is an easy-to-use implementation of ECDSA cryptography (Elliptic Curve
Digital Signature Algorithm), implemented purely in Python, released under the
MIT license. With this library, you can quickly create keypairs (signing key
and verifying key), sign messages, and verify the signatures. The keys and
signatures are very short, making them easy to handle and incorporate into
other protocols.

This library provides key generation, signing, and verifying, for five popular
NIST "Suite B" GF(p) curves, with key lengths of 192, 224, 256, 384, and 521
bits. The "short names" for these curves, as known by the OpenSSL tool, are:
prime192v1, secp224r1, prime256v1, secp384r1, and secp521r1. No other curves
are included, but it would not be too hard to add more.

Homepage:
https://github.com/warner/python-ecdsa
