static EcKey()
{
// All clients must agree on the curve to use by agreement. BitCoin uses secp256k1.
var @params = SecNamedCurves.GetByName("secp256k1");
_ecParams = new ECDomainParameters(@params.Curve, @params.G, @params.N, @params.H);
_secureRandom = new SecureRandom();
}