Virtualization. This was posted before. <A HREF="http://summit.xensource.com/pdfs/XenSecurity_Intel_CRozas.pdf" target="_blank">http://summit.xensource.com/pdfs/XenSecurity_Intel_CRozas.pdf</A> <A HREF="http://www.research.ibm.com/secure_systems_department/projects/vtpm/" target="_blank">http://www.research.ibm.com/secure_systems_department/projects/vtpm/</A>