JP2013258512A - Image forming apparatus, and back-up/restore method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect alteration of backed-up setting information when restoring the setting information to a device.SOLUTION: An image forming apparatus according to the present invention has processing means for backing up and restoring setting information of an application. The processing means, when backing up the setting information, calculates a hash value from the setting information, and backs up the setting information including the hash value; and when restoring the setting information, compares the hash value included in the setting information with the hash value calculated from the setting information excluding the hash value included in the setting information, and restores the setting information when both of the hash values coincide with each other.

Description

  The present invention relates to the field of image forming apparatuses, backup restore methods, and programs.

  2. Description of the Related Art In recent years, an image forming apparatus in which functions of devices such as a printer, a copy, a facsimile, and a scanner are housed in a single casing is generally known. Such a composite-type image forming apparatus is provided with a display unit, a printing unit, an imaging unit, and the like in one casing, and three types of applications corresponding to a printer, a copy unit, and a facsimile device, respectively. The apparatus is operated as a printer, a copy, a scanner, or a facsimile apparatus.

  As described above, as the image forming apparatus has various functions, items to be set in the image forming apparatus are increasing. Various setting items are usually set by a service person or an administrator from a web screen such as an operation panel provided in the image forming apparatus or a PC (personal computer) connected to the image forming apparatus via a network. It is set manually. Specific examples of setting items include “program registration” and “FAX destination list” in which setting modes frequently used on the device by the user are stored, and the selected values (default settings) for each setting mode when the device is started. It hits.

  Under such circumstances, when a plurality of image forming apparatuses are introduced in a customer environment, when a service person manually sets setting information (parameters) specific to the customer for each introduced apparatus, In addition to an increase in work time, there is a possibility that an operation error will occur in the work itself.

  Therefore, for example, a technique is known in which setting information set in one image forming apparatus is read (backed up) from the apparatus, and the setting information is written (restored) in other image forming apparatuses (for example, Patent Document 1). The service person manually sets the customer-specific setting information only for one image forming apparatus, and applies the setting information set for the first one to other image forming apparatuses. As a result, the same setting can be made for all the image forming apparatuses, and the work efficiency is greatly improved.

  Depending on the image forming apparatus, some setting information (parameters) may be different, but at least common setting information is applied uniformly, and the service person can change only some setting information. Even in this case, the work efficiency is improved.

  It is also useful to retain the setting information for recovery when trouble occurs in the image forming apparatus. This is because when the image forming apparatus is down due to a failure or the like, the original setting state can be quickly restored by applying the setting information read from the apparatus.

  However, conventionally, when setting information stored in the image forming apparatus is backed up to an external medium, the setting information is stored as electronic data in the external medium. However, the setting information may be falsified. For this reason, if the service person restores the falsified setting information without knowing the fact of falsification of the setting information, a problem occurs in the image forming apparatus.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an image forming apparatus, a backup restore method, and a program that detect falsification of the setting information when restoring setting information backed up to a device. To do.

  In order to solve the above problems, an image forming apparatus according to the present invention is an image forming apparatus having an application, and includes processing means for backing up and restoring setting information of the application, and the processing means includes the setting information. , The hash value is calculated from the setting information, the setting information including the hash value is backed up, and when the setting information is restored, the hash value included in the setting information and the hash value excluding the hash value are excluded. When the hash values calculated from the setting information are compared and matched, the setting information is restored.

  In order to solve the above problem, a backup restore method according to the present invention includes a processing procedure for backing up and restoring application setting information. When the setting information is backed up, the processing procedure starts from the setting information. When calculating the hash value, backing up the setting information including the hash value, and restoring the setting information, the hash value included in the setting information and the hash value calculated from the setting information excluding the hash value When they are compared and matched, the setting information is restored.

  In order to solve the above problems, a program according to the present invention causes a computer to function as processing means for backing up and restoring application setting information. When the processing means backs up the setting information, the setting information A hash value is calculated from the configuration information, the setting information including the hash value is backed up, and the setting information is restored, the hash value included in the setting information, the hash value calculated from the setting information excluding the hash value, and Are compared and the setting information is restored.

  In addition, what applied the arbitrary combination of the component of this invention, expression, or a component to a method, an apparatus, a system, a computer program, a recording medium, etc. is also effective as an aspect of this invention.

  According to the present invention, it is possible to provide an image forming apparatus, a backup restoration method, and a program that detect falsification of the setting information when the setting information backed up to the device is restored.

FIG. 2 is a block diagram illustrating a functional configuration of the image forming apparatus according to the present exemplary embodiment. 1 is a block diagram illustrating a hardware configuration of an image forming apparatus according to an embodiment. It is a figure which shows the function structure for implement | achieving the backup process which concerns on this embodiment. An example of the setting information of the nonvolatile memory according to the present embodiment is shown. An example of the operation screen which concerns on this embodiment is shown. An example of the backed up setting information according to the present embodiment is shown. It is a figure which shows the function structure for implement | achieving the restore process which concerns on this embodiment. It is a flowchart explaining the detail of the backup process which concerns on this embodiment. An example of the setting information which concerns on this embodiment is shown. It is a flowchart explaining the detail of the restore process which concerns on this embodiment. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Embodiment]
(Functional configuration related to image formation)
An image forming apparatus that fuses various image forming functions according to an embodiment of the present invention has, for example, a functional configuration as shown in FIG. FIG. 1 is a block diagram illustrating a functional configuration of the image forming apparatus according to the present embodiment. In FIG. 1, the image forming apparatus 1 includes an application layer 2, a platform layer 4, and an engine unit 8. The interface 3 is an interface (API) provided by the platform layer 4 to the application layer 2, and the interface 7 is an interface (engine I / F) between the platform layer 4 and the engine unit 8.

  The application layer 2 is a software group that performs individual processing in the image forming apparatus 1, and includes a copy application 2a that is a copy application, a fax application 2b that is a fax application, and a printer application that is a printer application. 2c, and a device setting information management application 20 that manages backup of setting information of the image forming apparatus 1 to a portable external storage medium and management of restoration of the setting information to the image forming apparatus 1.

  The platform layer 4 is a software group that provides a common service function to the application of the application layer 2 via the interface 3, and is divided into a service layer 5 and an OS layer 6.

  The service layer 5 includes a system control service (SCS) 5a having a plurality of functions such as application management, operation unit control, system screen display, LED display, resource management, and interrupt control, and a fax function API. Control service (FCS) 5b that provides the engine, an engine control service (ECS) 5c that controls the engine unit, and a memory control service (MCS) 5d that performs memory control And an operation panel control service (OCS: Operation panel Control Service) 5e that controls an operation panel (operation unit) that is an interface with the user, and a service that can be commonly used for applications that require network input / output Provided network control service ( CS: a Network Control Service) 5f, the user information control service for managing user rights information (UCS: User information Control Service) are included and 5g.

  On the other hand, the engine unit 8 includes engines such as a plotter 81, a scanner 82, and other hardware resources 83, and an engine control board 84 that controls these engines.

(Hardware configuration)
FIG. 2 is a block diagram illustrating a hardware configuration of the image forming apparatus according to the present embodiment. In FIG. 2, the image forming apparatus 1 is configured by connecting an operation panel 113, a fax control unit 116, a plotter 81, a scanner 82, and other hardware resources 83 to a controller 101 that performs a main control operation in the image forming apparatus 1. ing.

  In the controller 101, a CPU 106, which is an IC for general control, is connected to an ASIC 102, which is an IC for image processing, via an NB 105 serving as a bridge.

  An SB 108 that is a bridge that connects peripheral devices and the like to the PCI bus 9a of the NB 105, a NIC 109 that controls network communication, and a USB (Universal Serial Bus) target 110 that can capture data by handling it as a USB disk, A USB host 114 capable of transmitting and receiving large-capacity image data by connecting to an IEEE802.11b 111a that provides an IEEE802.11b interface, an IEEE1394 111b that provides an IEEE1394 interface, and another USB target (for example, a USB memory). And a memory card interface (I / F) 115 for inputting / outputting programs and data to / from a memory card 115d such as an SD (Secure Digital Memory Card) card.

  A local memory (MEM-C) 103 and an HDD (Hard Disk Drive) 104 as a storage device are connected to the ASIC 102, and a system memory (MEM-P) 107 as a storage device is connected to the NB 105.

  A process for controlling backup of setting information to a portable external storage medium and restoring the setting information to the image forming apparatus 1 according to the present invention will be described below. In the drawings to be referred to below, only the components related to the processing according to the present invention and the processing flow are shown, and other components and the other processing flow provided in the image forming apparatus 1 are omitted.

(Backup process)
FIG. 3 is a diagram showing a functional configuration for realizing the backup processing according to the present embodiment. In FIG. 3, an image forming apparatus 1 and a client PC 3 are connected via a network. The setting information of the image forming apparatus 1 can be backed up to the USB memory 114d connected to the image forming apparatus 1 or backed up to the client PC 3 via the network.

  The USB memory 114d is a USB-connectable storage device corresponding to the USB mass storage class. The usbhd 51 monitors a device connected to the USB host 114 by the USB connection detection unit 53 and activates the device setting information management application 20 by the application activation unit 55.

  The non-volatile memory 107b is a non-volatile memory in which setting information (also referred to as device setting information) of various applications set by the user via the operation panel 113 is stored. The nonvolatile memory 107b may be a part of the storage area in the system memory 107 or a part of the storage area in the HDD 104, for example.

  FIG. 4 shows an example of setting information of the nonvolatile memory according to the present embodiment. The setting information includes, for example, one or more pairs of setting items and their setting item values (parameters). In addition, each setting item can be identified by, for example, a setting item name as to which application the setting item is used. As an example, when the setting item and its setting item value are expressed as “Fax_001 = 001” in the setting information, it means the setting item 001 used in the FAX application and the setting item value 001 of 001.

  At the time of backup, the device setting information management application 20 acquires the setting information stored in the nonvolatile memory 107b and writes it in the USB memory 114d as described above.

  Here, the device setting information management application 20 includes a processing unit 20a. The processing unit 20a executes a backup / restore process of setting information. Among these, in the case of backup processing, setting information is read from the nonvolatile memory 107b, and the setting information is written to the USB memory 114d. In the case of backup via the network, setting information is transmitted to the client PC 3 via the network control service 5f. On the other hand, in the case of restore processing, the setting information is read from the USB memory 114d, or in the case of restoration via the network, it is received from the client PC 3 via the network control service 5f, and the setting information is written to the nonvolatile memory 107b.

-Backup processing to USB memory 114d First, the functional configuration of the image forming apparatus 1 will be described by taking backup processing to the USB memory 114d as an example. In FIG. 3, when the USB memory 114d is connected to the USB host 114 as a portable external storage medium in the image forming apparatus 1, the USB connection detection unit 53 of the usbhd (USB host daemon) 51 detects the connection (step S1) Notifying the application activation unit 55 in the usbhd 51 that the USB memory 114d is connected (step S2). In response to the notification of connection detection, the application activation unit 55 instructs the device setting information management application 20 to activate (step S3).

  FIG. 5 shows an example of an operation screen according to the present embodiment. When the device setting information management application 20 is activated, an operation screen as shown in FIG. 4 is displayed on the operation panel of the image forming apparatus 1. The user can instruct “backup” 401 or “restore” 402 by operating this operation screen.

  In this embodiment, when “backup” 401 is used, as options, “enable falsification detection” 404, “designation of hash value calculation range” 405, and “enable encryption of setting information” 406 are optionally provided. Can be selected.

  “Enable falsification detection” 404 is a setting item for enabling a function for detecting whether or not falsification has been made when the backed up setting information is restored.

  “Specify calculation range of hash value” 405 is a setting item for specifying the calculation range of the hash value in the case of “validating falsification detection”. For example, one of “A. entire setting information” or “B. attribute information portion” is selected.

  “Enable encryption of setting information” 406 is a setting item for encrypting the backed up setting information.

  In the present embodiment, when “restore” 402 is performed, as options, “enable tampering detection” 407, “designation of calculation range of hash value” 408, “enable decryption of setting information” 409 are optionally provided. Can be selected.

  “Enable falsification detection” 407 is a setting item for enabling a function for detecting whether or not falsification has been made when the backed up setting information is restored. When restoring the setting information backed up by checking “Tamper detection detection” 404 described above, check “Tamper detection detection” 407.

  “Specify the calculation range of the hash value” 408 is a setting item for specifying the calculation range of the hash value in the case of “enable falsification detection”. For example, either “A. Setting information as a whole” or “B. Attribute information part” is selected, but the same option as that selected in “Specifying the calculation range of hash value” 405 is selected.

  “Enable decryption of setting information” 409 is a setting item for decrypting the backed up setting information. When restoring setting information backed up by checking “Enable encryption of setting information” 406 described above, check “Enable decryption of setting information” 409.

  Next, when backup is instructed, the device setting information management application 20 accesses the nonvolatile memory 107b (step S4) and reads the setting information from the nonvolatile memory 107b (step S5). Then, the setting information is written to the USB memory 114d (step S6).

Backup Process to Client PC 3 A backup operation performed from the client PC 3 via the network will be described again using FIG. In response to a user instruction, the client PC 3 connects to the image forming apparatus 1 via a network and transmits a backup request (step S11), thereby via the network control service 5f of the image forming apparatus 1, the device setting information management application 20 is activated. For example, a screen similar to the screen shown in FIG. 5 is displayed on the client PC 3, and the user can instruct “backup” 401 or “restore” 402 from this screen.

  When backup is instructed (a backup request is received), the device setting information management application 20 (processing unit 20a) accesses the nonvolatile memory 107b (step S4) and reads the setting information from the nonvolatile memory 107b (step S4). S5). Then, the device setting information management application 20 transmits the setting information of the image forming apparatus 1 to the client PC 3 via the network (step S12). That is, the client PC 3 acquires setting information from the device setting information management application 20 of the image forming apparatus 1 via the network, and backs up the setting information on the disk of the client PC 3.

  FIG. 6 shows an example of backed up setting information according to the present embodiment. The backup source setting information is acquired from the setting information stored in the nonvolatile memory 107b. Therefore, as compared with FIG. 4, each setting item is the same as the setting information of the backup source. However, the backed-up setting information includes attribute information (header information) and hash value (footer information) related to backup in addition to each setting item. The attribute information and the hash value are written out by, for example, the processing unit 20a in the course of the backup process.

  In FIG. 6, “setting information“ 0325.txt ”” indicates the file name of the setting information. “Date / time: 2010-03-25T05: 00: 19 + 0900” indicates the date and time of backup. “Backup source: ABC001” indicates the identifier (for example, device ID, device name, etc.) of the device that is the backup source. The “hash value” is a hash value calculated for the range specified by the “hash value calculation range” in the setting information. Details will be described later.

(Restore processing)
FIG. 7 is a diagram illustrating a functional configuration for realizing the restore processing according to the present embodiment. In FIG. 7, an image forming apparatus 1 and a client PC 3 are connected via a network. The setting information of the image forming apparatus 1 can be restored from the USB memory 114d connected to the image forming apparatus 1 or from the client PC 3 via a network.

Processing for Restoring from USB Memory 114d Next, a case where the image forming apparatus 1 is restored using the setting information stored in the USB memory 114d will be described. The user inserts the USB memory 114 d into the image forming apparatus 1 and restores the setting information stored in the USB memory 114 d to the image forming apparatus 1.

  In FIG. 7, when the USB memory 114d is connected to the USB host 114 as a portable external storage medium in the image forming apparatus 1, the USB connection detection unit 53 of the usbhd 51 detects the connection as described above (step S1). Then, it notifies the application activation unit 55 in the usbhd 51 that the USB memory 114d has been connected (step S2). In response to the notification of connection detection, the application activation unit 55 instructs the device setting information management application 20 to activate (step S3).

  At this time, the operation screen of FIG. 5 described above is displayed on the operation panel or the like of the image forming apparatus 1, and the user selects setting information to be applied in the USB memory 114d from “reference” 403 when instructing restoration. Then, restore is instructed. When the device setting information management application 20 can check the USB memory 114d and specify setting information to be applied (for example, only one setting information exists or the latest setting information), this setting information is automatically stored. It can also be determined to restore.

  When restoration is instructed, the device setting information management application 20 (processing unit 20a) accesses the USB memory 114d (step S21) and reads setting information to be applied from the USB memory 114d (step S22). Then, the nonvolatile memory 107b is accessed, and setting information is written to the nonvolatile memory 107b (step S23).

Restore Process from Client PC 3 The restore operation performed from the client PC 3 via the network will be described again using FIG. In response to a user instruction, the client PC 3 connects to the image forming apparatus 1 via a network and transmits a restore request (including setting information) (step S31). Then, the device setting information management application 20 is activated by the network control service 5f of the image forming apparatus 1. In the client PC 3, for example, a screen similar to the screen shown in FIG. 4 is displayed. When the user instructs restoration, the setting information to be applied is selected from “reference” 403, and restoration is performed from this screen. Can be directed.

  When the device setting information management application 20 (processing unit 20a) is instructed to restore (receives a restore request including setting information), the device setting information management application 20 accesses the nonvolatile memory 107b (step S23), The setting information included in the restore request is written (step S24).

(Details of backup processing)
FIG. 8 is a flowchart for explaining the details of the backup processing according to this embodiment. Hereinafter, description will be given with reference to the drawings.

  S801: The processing unit 20a of the device setting information management application 20 first determines whether there is a backup execution request. Specifically, a backup execution request is input to the image forming apparatus 1 when a “backup” 401 is operated by the user on an operation screen (for example, FIG. 5). The backup execution request can be input from the operation panel of the image forming apparatus 1 or the client PC 3 via the network.

  S802: The processing unit 20a executes backup. Specifically, the nonvolatile memory 107b is accessed, and setting information (for example, FIG. 4) is read from the nonvolatile memory 107b. Alternatively, setting information is acquired from the client PC 3 via the network. Then, setting information is created by adding attribute information (see, for example, FIG. 9A).

  S803: Next, the processing unit 20a determines whether falsification detection is valid. Specifically, in the operation screen (for example, FIG. 5), when “Enable falsification detection” 404 is checked by the user, it is determined that falsification detection is valid.

  S804: The processing unit 20a calculates a hash value from the setting information according to the calculation range of the hash value (for example, see FIG. 9A). Specifically, on the operation screen (for example, FIG. 5), the setting of “Specify the calculation range of the hash value” 405 is referred to, and when “A. Entire setting information” is checked, hashing is performed from the entire setting information. Calculate the value. On the other hand, when “B. attribute information part” is checked, a hash value is calculated only from the attribute information part of the setting information.

  In more detail, the processing unit 20a obtains a hash value as a result of calculating the data of the entire setting information or the data of the attribute information portion with a predetermined hash function.

  S805: The processing unit 20a adds the calculated hash value to the setting information as, for example, footer information (see, for example, FIG. 9B).

  S806: The processing unit 20a determines whether or not the setting information is encrypted. Specifically, when “Enable encryption of setting information” 406 is checked on the operation screen (for example, FIG. 5), it is determined that the setting information is encrypted.

  S807: The processing unit 20a encrypts the setting information (see, for example, FIG. 9C). The processing unit 20a has a key for encryption in advance.

  S807: The processing unit 20a outputs setting information. Specifically, the setting information can be written to the USB memory 114d or transmitted to the client PC 3 via the network.

  If it is determined in step S803 that falsification detection is not valid, no hash value is added to the setting information. If the setting information is not encrypted in S806, the setting information is not encrypted.

(Details of restore processing)
FIG. 10 is a flowchart for explaining the details of the restore processing according to this embodiment.

  S1001: The processing unit 20a of the device setting information management application 20 first determines whether there is a restore execution request. Specifically, a restore execution request is input to the image forming apparatus 1 when the “restore” 402 is operated by the user on the operation screen (for example, FIG. 5). The restore execution request can be input from the operation panel of the image forming apparatus 1 or the client PC 3 via the network. Of course, setting information is also input.

  S1002: Next, the processing unit 20a determines whether or not to decrypt the setting information. Specifically, in the operation screen (for example, FIG. 5), when “Enable decoding of setting information” 409 is checked, it is determined that the setting information is to be decoded. Alternatively, referring to the input setting information, if the setting information is encrypted, it may be determined that the setting information is automatically decrypted.

  S1003: The processing unit 20a decrypts the setting information. The processing unit 20a has a key capable of decrypting the encrypted setting information.

  S1004: Next, the processing unit 20a determines whether falsification detection is valid. Specifically, if “Enable tampering detection” 407 is checked by the user on the operation screen (for example, FIG. 5), it is determined that tampering detection is valid. If it is determined in step S1004 that falsification detection is not valid, the process proceeds to step S1007 and restore is executed regardless of whether the setting information has a hash value.

  S1005: The processing unit 20a calculates the hash value from the setting information according to the calculation range of the hash value. Specifically, in the operation screen (for example, FIG. 5), the setting of “Specify calculation range of hash value” 408 is referred to, and when “A. Entire setting information” is checked, hashing is performed from the entire setting information. Calculate the value. On the other hand, when “B. attribute information part” is checked, a hash value is calculated only from the attribute information part of the setting information. Note that if a calculation range different from “Specify calculation range of hash value” 405 at the time of backup is checked, the calculated hash value is also different. Therefore, here, the same calculation range as “designation of hash value calculation range” 405 at the time of backup is specified.

  Note that the processing unit 20a obtains a hash value by calculating the data of the entire setting information or the data of the attribute information portion with the same hash function as in S804.

  S1006: The processing unit 20a compares the hash value calculated in S1005 with the hash value of the setting information input for restore, and determines whether or not they match.

S1007: When both hash values match, the processing unit 20a executes restoration.
Specifically, the nonvolatile memory 107b is accessed, and the input setting information is written to the nonvolatile memory 107b.

  S1008: On the other hand, if the two hash values do not match, the processing unit 20a rejects the restore execution. In this case, for example, a message indicating that restoration cannot be performed is displayed on the operation panel of the image forming apparatus 1, the client PC 3, or the like.

  Here, the case where the two hash values do not match means that the setting information within the calculation range of the hash value is different, that is, rewritten, between the backup time and the restore time.

  For example, when the calculation range of the hash value is “A. Entire setting information”, the hash value is calculated from the entire setting information. If the hash values calculated at the time of backup and at the time of restore do not match, some of the entire setting information is rewritten.

  On the other hand, for example, when the calculation range of the hash value is “B. attribute information part”, the hash value is calculated from the attribute information part. If the hash values calculated at the time of backup and at the time of restore do not match, some of the attribute information portion of the setting information has been rewritten.

  If the calculation range of the hash value is “B. attribute information part”, the hash value is calculated from the attribute information part. Therefore, even if a serviceman rewrites a certain setting item value in the setting information of the USB memory 114d, the setting information after the rewriting can be restored. This is because each setting item group part is outside the calculation range of the hash value. As a result, after backup of the setting information, the service person or the like can once open the setting information file in the USB memory 114d, change the desired setting item value, and restore the setting information.

  On the other hand, in this case, if the calculation range of the hash value is “A. entire setting information”, the rest is rejected (S1008). This is because each setting item group is also outside the calculation range of the hash value.

  As described above, according to the embodiment of the present invention, it is possible to provide an image forming apparatus that detects falsification of the setting information when restoring the setting information backed up to the device. Note that the present invention is not limited to such specific embodiments, and various modifications and changes can be made within the scope of the gist of the present invention described in the claims. For example, the present invention can be applied to an information processing apparatus (system, server, dedicated apparatus, PC, etc.) that can back up or restore setting information in addition to the image forming apparatus according to the present embodiment.

DESCRIPTION OF SYMBOLS 1 Image forming apparatus 2 Application layer 2a Copy application 2b Fax application 2c Printer application 20 Device setting information management application 20a Processing part 20b Scheduled application list 3 Client PC
4 platform layer 5 service layer 5a system control service 5b fax control service 5c engine control service 5d memory control service 5e operation unit control service 5f network control service 5g user information control service 51 usbhd
53 USB connection detection unit 55 Application startup unit 6 OS layer 7 Interface 8 Engine unit 81 Plotter 82 Scanner 83 Other hardware resources 84 Engine control board 101 Controller 102 ASIC
103 Local memory (MEM-C)
104 HDD
105 NB
106 CPU
107 System memory (MEM-P)
107b Non-volatile memory 108 SB
109 NIC
110 USB target 111a IEEE802.11b
111b IEEE 1394
114 USB host 114d USB memory 115 Memory card I / F
115d memory card

JP 2007-128493 A

Claims (6)

An image forming apparatus having an application,
Processing means for backing up and restoring the setting information of the application;
When the setting information is backed up, the processing means calculates a hash value from the setting information, backs up the setting information including the hash value, and restores the setting information, the hash value included in the setting information And the hash value calculated from the setting information excluding the hash value are compared and matched, the setting information is restored,
An image forming apparatus. The setting information includes attribute information and setting items,
The processing means calculates a hash value from the attribute information;
The image forming apparatus according to claim 1. The processing means has a setting means for setting either the attribute information or the setting item as a target for calculating a hash value;
The image forming apparatus according to claim 2. The processing means encrypts the setting information with the hash value added when the setting information is backed up, and decrypts the encrypted setting information when restoring the setting information;
The image forming apparatus according to claim 1, wherein the image forming apparatus is an image forming apparatus. A backup restore method,
Has a procedure to back up and restore application setting information,
When the setting information is backed up, the processing procedure calculates a hash value from the setting information, backs up the setting information including the hash value, and restores the setting information, the hash value included in the setting information And the hash value calculated from the setting information excluding the hash value are compared and matched, the setting information is restored,
A backup restore method characterized by the above. On the computer,
It functions as a processing means to backup and restore application setting information,
When the setting information is backed up, the processing means calculates a hash value from the setting information, backs up the setting information including the hash value, and restores the setting information, the hash value included in the setting information And the hash value calculated from the setting information excluding the hash value are compared and matched, the setting information is restored,
A program characterized by

Images