With more and more security problems’ arising in terminal systems

users could not trust the computers and information systems.This paper proposes a new method of protection for process.It（adopts） techniques of trusted computing platform

and asserts the process’s trust by measuring integrity of its codes and data.This method uses software and hardware synthetically

measuring the integrity value by unidirectional hashing algorithm

establishes a trust path from user to process

and guarantees the trustworthy of computer.The test results have shown that this method is good for enhancing the computer’s security

protect critical applications in insecure environment and prevent file from modifying unauthorized.