Hi Larry, Thanks for your interest in GuardianEdge. I asked around and was able to find out that GuardianEdge indeed does use TPM. Have a good day, Regards, Max Valerio Max Valerio Business Development GuardianEdge Technologies 475 Brannan Street, Suite 400 San Francisco , Ca 94107-5421 Phone: (415) 683-2221 GuardianEdge Technologies "The Encryption Anywhere Company"