JPH01314361A - Information processor - Google Patents

Abstract

PURPOSE:To inhibit a medium from being read by a device except a device which is used for writing by writing characteristic information on the medium, device by device, automatically and performing collating operation automatically at the time of reading. CONSTITUTION:For example, when a floppy disk medium 1 is formatted on a device, whether or not device switch information is written on the medium can be selected and when the writing is specified here, the contents of a device switch 2 are written at a certain specific part 3, e.g. a characteristic sector on the 0 cylinder after the formatting operation. In this case, information on each device user is written additionally to information in the device switch 2 and the added information is recorded and held in the device switch 2 as well. When the floppy disk medium 1 is loaded on the device, its medium information is read in and when the information is not the initial value data after the formatting, it is compared with the information in the device switch to disable following processing unless the information is coincident. Consequently, the medium can not be read except by the device which is used at the time of the writing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an information processing apparatus, and particularly to an information processing apparatus with an improved data security protection method.

[Conventional technology]

Examples of this type of method in conventional information processing devices include a password method and a management method using a device number.

[Problem to be solved by the invention]

The conventional password method described above has the disadvantage that floppy disk files can be easily accessed by anyone anywhere who knows the password, and management using device number information requires the manufacturer to set the device number individually before shipping. There was a sense of annoyance.

[Means to solve the problem]

The information processing device of the present invention includes a device switch for specifying a device number unique to the device, means for reading device number information from the device switch, means for writing the corresponding device number information on a medium, and a device number recorded on the medium. and means for reading the information and comparing it with the device number information read from the device switch.

〔Example〕

Next, one embodiment of the present invention will be described using the drawings.

In FIG. 1, 1 is a floppy disk magnetic body, and 2 is a device switch within the device. The device switch 2 is a non-volatile read/write memory that holds a device-specific bitbump sequence, which is information that can be defined only once for the device by an operator.

For example, when formatting a floppy disk medium on a device, it is possible to select whether or not to write device switch information on the medium, and if you select to write it here, a certain part 3 after formatting is completed, e.g. Write the contents of the device switch to the characteristic sector on cylinder 0. At this time, information is added and written for each device user to the information in the device switch, and the additional information is similarly recorded and held in the device switch.

When a floppy disk medium is installed in the device, the medium information is read, and if the information is other than the initial value data after formatting, it is compared with the information in the device switch, and if it does not match, processing cannot be continued. If they match, the information is further compared with the additional information for each device user, and if the information is unregistered, processing cannot be continued.

[Effects of the Invention] As explained above, the present invention makes it possible to automatically write information specific to each device onto a medium, and also automatically performs verification when reading, thereby giving the operator special information. This has the effect of prohibiting reading of the medium by a device other than the device used for writing, without forcing the user to repeat the process.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention. 1... Floppy disk magnetic part, 2... Device switch, 3... Specific part after formatting into which information read from the device switch is written.

Claims (1)

[Claims] a nonvolatile memory for storing device number information unique to the device and user number information unique to the device user; means for reading and writing to the nonvolatile memory; and a medium for storing the device number information and user number information. an information processing device comprising means for writing the information, and means for reading the same information from the medium and comparing it with device number information and user number information in the nonvolatile memory.