| 摘要 |
PURPOSE: To prevent the execution of incorrect or not proper program version by enciphering a load module containing a correct program version and a syn chronizing key, storing that module in the table of a safe memory and deciphering the module by using the synchronizing key when it is desired to execute a program. CONSTITUTION: The correct program version is constituted into load module 11 containing a synchronizing key 29, enciphered inside an enciphering device 12 and made into enciphered load module 13 containing an enciphered key 29E. Next, the enciphered load module 13 is written in a load library 14 by a interlocked editor 25 and stored in a table 15 of the safe memory together with the synchronizing key to which the title of correct program is related. Thus, the execution of incorrect program version is prevented and at the same time, the program of plane sentence at the time of storing the program in the main memory of computer system can be executed. |
