The normal download consists of the following:
  • Java Applet
  • Server side jar
  • sample codes
  • javadoc
  • A set of public-private keys
Get it here.

With a little help, you can get the public-private key generator.

Just a little contribution will go a long way to further develop this program. When you do so, you will receive an email that contains the key pair generator. You can use this generator as many times and as long as you need it.