| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable an illegal action to software to be prevented by managing secret data of a computer and also to smoothly process its maintenance. SOLUTION: In a signal processing means such as a micro processor having a secret memory 5 so as to hold secret data, reading of the secret data written in this secret memory to outside is completely prohibited and it is decided whether these secret data match reference data to be compared with these secret data. And further, when the secret data is updated or erased, the data which is the same to the object data has to be provided. Also, by storing a password in accordance with the secrete data, this password becomes a substitute for an address of the secret data.</p> |
