What is a Voucher?
A voucher is an encrypted digital representation which stands for or represents something else. A voucher is said to be "backed" by whatever underlies it, such as gold or silver. Vouchers are digital bearer certificates circulated and validated by a Publisher.
So what is the P2P Voucher Payment System?
It is a mechanism for the secure, anonymous exchange of digital vouchers peer-to-peer between users, implemented as an extension to
XMPP

(aka
Jabber

), an instant messaging service. Basically, you can pay anyone you can chat with.
Does this system actually exist?
Yes! It is presently in beta test, and
you can participate. Much more information is available inside this site. Simply register a login at
www.voucher-safe.org to find out more.
Is it open source?
Yes. Every component is open source and standards-based.