In this section, we show how some concepts in e-commerce and international trade work. They mostly use scripts, so, if your browser does not support scripts, then - sorry, but you can't play with these demos.
This demonstration explains how digital signatures work.
It starts by explaining (briefly) some terminology, and then offers an interactive presentation of how cryptography can be used to prove the authenticity and integrity of a message. After that some more explanation about public key cryptography, and then a chance to see the creation and verification of a digital signature, with the opportunity to play hacker as well as sender and receiver.
Please note that the crypto algorithms used were created for demonstration purposes only and are by no means secure.