System and method for protecting use of dynamically linked execution modules

摘要

The computer system has a program module checking device and at least first and second program modules. Each program module includes digital signatures and execution procedures. In addition, the first program module may include a procedure call to the second procedure module, a procedure call to the program module testing device logically disposed in the first program module to be executed prior to the execution of the procedure call to the second program module, And preventing the procedure call to the second program module from being executed when a procedure call to the program module testing device causes a test deny returned by the program module testing device. The second program module comprises an executable procedure to be executed by the first program module in response to the procedure call to the second program module, a second program to be executed before completing the execution of the second program module executable procedure, A procedure call to a program module testing device logically disposed in the module, and an instruction to prevent the program module testing device from completing the execution of the executable procedure when returning a test deny regarding the first program module. The program module checking device responds to the procedure call by checking the reliability of the arbitrarily designated program module and returning a check approval or rejection. When the program module checker fails to check the reliability of the program module, the calling program module is suspended except for its execution.