What software implementations are available?
Wei Dai’s Crypto++ library has elliptic curve routines, but has a restricted choice of curves (AFAIK). If you are not U.S. resident you may have some trouble obtaining Crypto++ (but persevere and you will probably find it somewhere!) Pegwit is a complete program in ‘C’ with PGP-like functionality using elliptic curves, and is available from http://ds.dial.pipex.com/george.barwood/v8/pegwit.htm Equivalent C++ elliptic curve code, and the code used to calculate the curve parameters is at http://ds.dial.pipex.com/george.barwood/crypto.htm The latest version of this FAQ can be found at http://ds.dial.pipex.com/george.barwood/ec_faq.txt or in html form at http://ds.dial.pipex.com/george.barwood/ec_faq.htm A German translation by Ulf Möller is at http://www.fitug.de/ulf/faq/ec_faq.html Acknowledgments: Special thanks to Ulf Möller for many improvements, and also to Paulo Barreto, Glynne Casteel, Wei Dai, Michael Greene, Kris Van Hees, Bodo Möller, Paul Onions, Mike Rosing, Roger Schlafly and
