| 摘要 |
PROBLEM TO BE SOLVED: To prevent a computer from being illegally accessed by other computers in any place of all over the world even when an identification(ID) number is leaked to the external, by making it possible to access a computer network system not depending upon only a user's ID number. SOLUTION: A format area different from a conventional format area in a data storage device is secured to store individual ID data or the like in the secured area. The secured area can store consistent data without being formatted even by a format instruction executed by a user. The individual ID data can be stored also by the use of a hardware chip. Since each computer has its own individual ID information, an ID number can not be accessed from other computers except from the specific computer even when it is leaked to the external, so that illegal accesses by third parties is drastically restricted. |
