ThreatMetrix has been working on a way to identify people's browser without the use of cookies. They have some proprietary solution which probably does a combination of magical browser hashing and incorporating with their existent fraud database. Thus they built a service that allows companies to better track fraudsters without the user of cookies. Me being a bit paranoid, it creeps me out.
I wish I knew more, but as the technology is proprietary and highly secretive you get stuff with marketing speak. However if they are doing browser stuff, they have to do something with JavaScript which could be investigated, but will probably be well hidden and obfuscated.
Can someone translate from marketing-speak into technical-speak?