NAME

Crypt::ECDSA::Curve::Prime -- Elliptic curves ove F(q), with q prime, for EC cryptography

DESCRIPTION

These are for use with Crypt::ECDSA, a Math::BigInt based cryptography module. These routines work most efficiently if the GMP math library is installed.

new

  Delegated to base class Crypt::ECDSA::Curve

is_on_curve

  return 1 if (x, y) is on the curve, otherwise undef.

add_on_curve

 Add a point on the curve to itself or another

subtract_on_curve

 Subtract a point on the curve.  Addition of an additive inverse.
 

double_on_curve

  Double a point on the curve.   
  Returns a new point.  Note this does NOT change the original point.

inverse_on_curve

  get a point's additive inverse on the curve: (x, y) becomes (x, -y)

multiply_on_curve

  my $Q = $G * n;

  Multiply a curve point by a scalar.  
  Note this should always be Point * scalar, not scalar * Point.

is_weak_curve

  tests for known weak curve parameters

FUNCTIONS

equation

  Return ascii string representation of the field equation

AUTHOR

   William Herrera B<wherrera@skylightview.com>. 

SUPPORT

Questions, feature requests and bug reports should go to <wherrera@skylightview.com>.

COPYRIGHT

Copyright (c) 2007 William Herrera. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.