| 摘要 |
PURPOSE:To prevent precisely without-permission use by collating a pass word inherent to a program with a pass word inherent to a device and previously set up in the device side to give the permission of use. CONSTITUTION:A cipher tape TP includes a ciphered program and a ciphered pass word inherent to the cipher tape and a deciphering/storing means DECM deciphers the contents of the cipher tape TP and stores in a memory MEM. A checking program execution means CHC executes a checking program and inquires a pass word to a pass word generating means PWG setting up a pass word inherent to the device. A matching means DET collates the pass word from the pass word generating means PWS with the pass word included in the cipher tape TP. When the collating means DET decides the dissidence in collation, a program use inhibition control means DET is disabled from elimination or use of the program stored in the memory MEM. |
