JPS58109953A - Security system for floppy disc volume - Google Patents

Abstract

PURPOSE:To secure a secret easily and surely, while keeping the interchangeability, by making an index area ineffective, restoring the index area only when permitted, and accessing the volume. CONSTITUTION:A processing request to a file in a floppy disc volume takes place in a CPU 1, the access control for a floppy disc 7 is executed. A floppy disc processor 2 checks a security display flag 3 and when the flag is set to 1, it is discriminated that the security processing is executed for the volume of the disc 7 and the restoration is executed. The restoration is executed by loading an index data stored in an index save area of #74 of the disc 7 to a system working area 6 and restoring it to the index area of the #1 track of the disc 7. A file control processor 4 knows the storage location of the objective file data, the file data is loaded to the working area 6 for access processing.

Description

DETAILED DESCRIPTION OF THE INVENTION (11) Technical Field of the Invention The present invention relates to a security processing method for a floppy disk volume, and in particular, a method for generally prohibiting access to a floppy disk volume by invalidating an index area; The present invention relates to a security processing method that allows access to a volume by restoring an index area only when authorized.

(2) Background of the Technology 7 With the spread of computers and office computers, they are being used in many fields as an affordable file storage means for storing a wide variety of information such as programs and data. ?・Aisle information includes
Ih41,0. which prohibited reading of information by others. There is a need for a system that can easily protect data on a 70 disk volume basis to protect data from being accidentally written to or erased.

(3) Prior Art and Problems As a conventional floppy disk security method, there is a method of changing the items of label regulations.

However, since changing the items in the label convention violates the label convention, there is a problem in that compatibility with other systems is lost when using file data.

(4) Purpose of the Invention The purpose of the present invention is to provide a system that can easily secure the security of a dormitory while preserving the compatibility of floppy disk volumes.

(5) Structure of the Invention Ninthly, the present invention achieves the above object by using means for invalidating the index part of a floppy disk volume, and as a structure thereof, the floppy disk volume is divided into an index area and a data area. For floppy disk volumes that consist of an index save area and must be protected, the index section is moved from the index area to the index save area.

When performing index save processing to invalidate the index area and using the S-secure floppy disk 1 polynym, if permission to use the floppy disk volume is granted <@D,
After performing index restoration processing to restore the original index part from the index save area to the index area, access processing to the floppy disk volume is performed, and on the other hand, if permission to use the floppy disk volume has not been granted, In this case, access processing is performed on the floppy disk and disk 0 volume without performing the above index restoration processing, and at that time, the reference to the ninth data area of the disabled index area is disabled. This is a characteristic feature.

(6) Examples of the invention Examples of the present invention will be described in detail below.

FIG. 1 is an embodiment diagram for explaining the area allocation of a 7a disk volume to which the method of the present invention is applied, (a) shows area allocation without security protection, Indicates area allocation for protected items.

In the figure, one side of the floppy disk consists of a total of 75 tracks with track numbers #0 to #74. Of these, the area available to the user is
The track numbers range from #O to #73. #7 after e
The 4th track is called the C11l) rack, and is an area that is visually visible from the needs of the user. Here, track #0 is used as an index area containing error maps, volume labels, file labels, etc.

Generally, when accessing a file in a floppy disk system, you must first access this index area and go through the procedure of referencing the system label and file label in order to access the desired data section. The system configuration is as follows.

7! 2 Tsubii disc's confidential insurance store M is truck #7
4 as the index save area, the index area data of tracker #0 is saved to track #74 as shown in FIG. 1(k)K, and invalid data is written to track SO. In addition, the purpose of invalidating the index area can be practically achieved by simply changing the volume label to invalid data. Therefore, if the floppy disk is rewritten using the conventional conventional method. of the index area if accessed.

For example, by reading the volume ID (for example, an invalid volume), it is determined that the volume ID does not match, and the data section cannot be referenced, making it impossible to read out one data section. # To read the data section, special preprocessing is required to restore the index data from the index save area of track #74. Authorization to use a secure floppy disk volume is made possible by identifying a floppy disk security indicator flag that is issued by an operator and is set, for example, based on command instructions from the operator.

When the operator authorizes the use of a floppy disk polyneme that has been secured as described above, the operator sets the security display flag to "1'"; otherwise, the operator sets the security indication flag to "1'"; Nevertheless, a false indication of “no security” is given. The display is "oll".

As a result, the unauthorized security processing volume is accessed through the normal processing route without the above-mentioned special preprocessing or index restoration processing, and the data in the index area read and referenced is an invalid index, so the target data section is extracted. becomes unable to do so.

FIG. 2 is a block diagram of an embodiment system that handles floppy disk volumes that have undergone the above-mentioned 9-Secret Impulse Preservation Process, and FIG. 3 is a flowchart showing its control procedure.

In Fig. 2, 1 is the central processing unit, 2 is the floppy disk processor FPDP, 3 is the FPD security display button, 4 is the file control processor FCP5#'i main storage, 6Fi system work area 8WA, 7 is the floppy disk 7 in Figure 3 below shows each FPD.
The operation of the embodiment system shown in FIG. 2 will be explained according to the following.

First, when a processing request for a file in a floppy disk volume occurs in the central processing unit 1, %FPDP 2 K control is passed, and access control is performed through the FPD 7. The FPDP 3 checks the FPD security display flag 3 in its condition determination unit,
For example, if the hook is set to "1" by a command from the operator.

It is determined that the volume of FPD 7 has been subjected to security protection processing, and in order to restore the index area, an 8WA 6K buffer area is secured in the main storage device 5, and control is given to the restoration processing unit to execute restoration processing ■. move,
On the other hand, if the flag is displaying “0”, k″PD
7 is interpreted as not having undergone security processing, and moves to the conventional processing route.

The restoration process (■) restores the index data stored in the index save area of track #74 of the FPD7.
The index data is loaded into the 5WA6 and then restored from the 8WA6 to the index area of track #0 of the FPD 7.

After the restoration process is completed, FPDP 2 to FCP 4K
Control is passed. The FCP4 outputs the file in order to execute a file processing request for the volume of the FPD7.
f'gNl,, refer to the index area, identify the volumetric label, and further determine the storage location of the target file data from the file label, and load the file data from there to 8WA 6. 6 Next, FCP4 loads After performing access processing for searching or updating the file data, the file data is stored again in a predetermined location on the FPD 7, and the file is transferred to the C
LO8E.

When the FOP processing is completed in this way, control is transferred to the FPDP2.
will be returned to. FPDP 2 is the FPD again in the condition determination section.
Examine security display flag 3. At this time, since the security display flag 3 is set to "]1, the process (2) of saving the data in the index area to +74 to 99 and invalidating the index area is performed. This saving process (2) is performed on the FPD. 7 to the original secure state KJI
It is necessary to save the index data in order to
Similar to the restoration process ①, this is executed by input/output processing via 8WA 6.

In the manner described above, file processing for the floppy disk volume that has undergone security processing is completed.

The evacuation process, which consists of index evacuation and index area invalidation, is activated by setting the security processing flag 3 to "Security protection" and by using the relevant floppy disk volume. It is also necessary to note that the security-protected volume also returns to its normal volume state once it is restored.

Therefore, even if it is necessary to newly secure a floppy disk volume that has not yet been secured, the WKs operator who uses the unsecured floppy disk volume must Security processing can be performed simply by giving an instruction to set protection display flag 3 to "Security protection".
After the floppy disk volume is used, it is automatically saved and becomes a secure floppy disk volume.

In addition, in this embodiment, the use of security-protected floppy disk volumes was made possible by manipulating the display of the security processing flag in response to instructions from the operator, but other information such as user passwords, etc. It is also possible to set arbitrary permission conditions and start the program.

(7) Effects of the Invention As described above, the present invention can easily and reliably protect the security of 70 disk volumes using very simple means. The floppy disk polynym has a volume,
Compliance with standard formatting conventions such as labels, data, etc. does not compromise compatibility, and the present invention securely handles f < 7 O disk volumes. In this case, the security protection process is also transferred at the same time, that is, the invalid index area is transferred, but the save area is not transferred and rounding cannot be restored, making this an effective protection measure against illegal copying.

[Brief explanation of the drawing]

FIG. i1 is an explanatory diagram of floppy disk volume area allocation in the embodiment of the present invention, FIG. 2 is a block diagram of the system of the embodiment of the present invention, and FIG. 3 is a flow diagram showing the control procedure. In the figure, it; is the central processing unit, 2 is the floppy disk processor, 3 is the security display flag, 4 is the file control processor, 5 is the main storage, 6 is the system work area, and 7 is the floppy disk. show. Patent Applicant: Fujitsu Limited Representative Patent Attorney, Written by Yo Hase (1 other person)

Claims (1)

[Claims] For floppy disk volumes that consist of an index area, a data area, and an index save area, and which must be kept confidential, move the index section from the index area to the index save area and invalidate the index area. Perform index save processing. 1. When using the secured floppy disk volume, only if permission to use the floppy disk volume has been granted, the index save area will be moved from the index save area to the index area. After performing index restoration processing to restore the original index part, access processing to the floppy disk volume is performed.On the other hand, if permission to use the floppy disk volume has not been granted, the above index restoration processing is performed. The KL is configured to perform access processing on the floppy disk volume without any processing, and at that time, reference to the data area is made invalid due to the invalidated index area. Protection processing method.