Hi all, Found these in PC Week and thought I would pass them along... CARI - http://www. netresource.com/itp/cari.html Collect All Relevant Information, a transaction system that doesn't require live transmission of sensitive data. Cybercash Inc. - http://www.cybercash.com/ Secure transaction over the internet, using credit and cash payment systems. Digicash - http://www.digicash.com/ Electronic transaction products include ecash; find the links to ecash-centric 'cybershops'. First Virtual - http://www.fv.com/ Secure internet-based system that uses the WWW and email for digital payment transactions. Internet Banking - http://sfnb.com/wpaper.html White paper on electronic commerce NetChex - http://www.netchex.com/index.html Secure transactions over the internet, using a bank account debit system. Network Payment Mechanisms and Digital Cash - http://ganges.cs.tcd.ie/ mepeirce/project.html Overview of trands and techniques, with several useful links for additional information.