SOX is now in its 2nd version, having been rewritten from scratch, and used as the protocol within a new generation of Ricardo.

• Development of an Open and Flexible Payment System by Gary Howland

  Abstract: The Internet is in need of a simple, open, flexible and secure payment system. Many payment systems that currently exist are either proprietary, insecure, inflexible or all three. This paper examines the types of payment system in use today, the payment system requirements of Systemics Ltd., an overview of the Systemics Open Transaction (SOX^(tm)) payments system that was developed, and a summary of how this system met the requirements.

  The SOX payment system is currently in live use for a bond trading system, and a reference implementation will shortly be made available on the Internet.

• Executive Summary - fast-track description of SOX.