The Trusted Computing Platform Alliance, or TCPA, is an initiative led by Intel
that provides for a monitoring component--a "smart chip"-- to be mounted
in the motherboards of PCs. Palladium, the Microsoft equivalent, builds on TCPA
hardware and will be installed on future versions of Windows.
To get the facts on TCPA and Palladium, go to the FAQs site at http://www.cl.cam.ac.uk/users/rja14/tcpa-faq.html