Abstract: A system and method for executing secure transactions on a computer system is disclosed. The computer system includes a memory. In one aspect, the method and system include providing a basic input output system (BIOS) on the computer system, providing a secure peripheral coupled with the computer system, and providing a master security co-processor coupled with the computer system. The BIOS includes first unit for indicating a first trust relationship with the BIOS. The secure peripheral includes second unit for indicating a second trust relationship with the secure peripheral. The master security co-processor is for processing sensitive data on the computer system and includes third unit for indicating a third trust relationship with the master security co-processor.