JP2006139516A - Device for distributing data erasure program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for distributing data erasure programs capable of distributing a data erasure program to an information terminal. <P>SOLUTION: When a distribution request for requesting the distribution of the data erasure program is received from a terminal 2 to be erased that can be operated by an access user connected via a computer network 4, and the payment information of charge is authenticated by a payment server 5, the device 1 for distributing data erasure programs distributes the data erasure program stored in a storage section 102 to the terminal 2 to be erased. The terminal 2 in which erasure is to be performed erases the data in a storage 202 included in the terminal 2 so that the data cannot be easily restored, based on the data erasure program. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention distributes a data erasure program to information terminals such as personal computers and PDAs in a user's home or workplace via a computer network such as the Internet or LAN, and erases data stored in a storage device of the information terminal. The present invention relates to a data erasure program distribution device that can be executed.

  In recent years, the product life of personal computers and peripheral devices has been shortened, and the cost of disposing of these outdated personal computers and peripheral devices has become a problem. In 2002, personal computers were subject to regulation under the Recycling Law. It was.

  On the other hand, these personal computers generally have a storage device such as a hard disk, which stores various data such as personal information, company information, installed software that is not licensed for use by anyone other than the original owner. However, when various data is deleted or the storage device is formatted by the function of the operating system running on the personal computer, only the management information of the various data is deleted, the entity information is not deleted, etc. Various data can be restored based on information remaining in the storage device.

  In this way, when disposing or reusing a personal computer, personal information, company information, installed software that is not licensed for use by anyone other than the original owner, etc. There was a problem that various data were restored and leaked.

  In response to such a problem, the use of a recording medium on which a data erasing program having a complete erasing function that deletes various data with difficulty is restored so that no information that enables restoration of various data remains. There is a data erasing system that enables a person to completely erase various data from a storage device (see, for example, Patent Document 1).

JP 2001-344071 A (page 4, FIG. 1)

  However, in the system described in Patent Document 1, a recording medium recording a data erasure program created in advance by a business operator who distributes or sells a data erasure program is stored at the business operator's location for the user to obtain or purchase. It is necessary to go to the site, and users can easily erase the data stored in the storage devices of information terminals such as personal computers and PDAs that are used by users at home or work by using these data erasure programs. There was a problem that I could not.

  Further, when these data erasing programs are distributed via a recording medium, there is a problem that these data erasing programs are easily used illegally by users.

  Furthermore, when these information terminals are reused, the result information including the erasing date and time and the erasing method of the data stored in the storage device possessed by the information terminal, the device information including the name of the device possessed by the information terminal and the operating status of each device. Therefore, there is a problem in that it is not possible to promote the reuse of the storage device and the erasure target terminal.

  The present invention has been made paying attention to such problems, and provides a data erasure program distribution apparatus capable of distributing a data erasure program to information terminals via a computer network such as the Internet or a LAN. It is an object.

In order to solve the above object, a data erasure program distribution device according to claim 1 of the present invention provides:
A distribution request receiving means for receiving a distribution request for requesting distribution of a data erasure program from an erasure target terminal operable by an access user connected via a computer network;
Program storage means for storing the data erasure program;
Program distribution means for distributing a data erasure program stored in the program storage means to the erasure target terminal that is a transmission source of the received distribution request based on reception of the distribution request;
With
Based on the data erasure program distributed from the program distribution unit, the erasure target terminal is caused to execute an erasure step of erasing data stored in the storage device included in the erasure target terminal included in the data erasure program with difficulty in restoration. It is characterized by that.
According to this feature, the data erasure program is distributed to these erasure target terminals by receiving a distribution request from a erasure target terminal such as a personal computer or PDA that is used at home, work place, or destination. Therefore, the data in the storage device can be easily deleted without visiting the location of the business operator who distributes or sells the data deletion program. Therefore, convenience for access users can be improved. Further, the data erasure program is stored only in the data erasure program distribution device, and is distributed to the erasure target terminal that has transmitted the distribution request, and the data erasure program includes a part or all of the distributed data erasure program. Since the erasure is performed, unauthorized use of the distributed data erasure program can be prevented as much as possible.

A data erasure program distribution device according to claim 2 of the present invention is the data erasure program distribution device according to claim 1,
In the erasure target terminal based on the data erasure program delivered from the program delivery means,
A result information recording step of storing result information including at least one of the execution date and time of the erasing step or an erasing method in the storage device after data erasure; and
A result information output step for outputting the result information stored in the storage device after data erasure in the result information recording step;
A result of storing a result information output activation program included in the data erasure program for executing the result information output step in an activation area for storing a program to be executed when the erasure target terminal is activated in the storage device An information output preparation step;
It is characterized by executing.
According to this feature, when the erasure target terminal is activated after erasing the data in the storage device of the erasure target terminal, the result information including the erasure date and the erasure method is output. Therefore, the reuse of the storage device and the terminal to be erased can be promoted.

A data erasure program distribution device according to claim 3 of the present invention is the data erasure program distribution device according to claim 1 or 2,
In the erasure target terminal based on the data erasure program delivered from the program delivery means,
A device information recording step for storing device information including the name of the device of the terminal to be erased and / or the operation status of each of these devices in the storage device after data erasure;
A device information output step for outputting the device information stored in the storage device by the device information recording step;
A device that stores a device information output activation program included in the data erasure program for causing the device information output step to be executed in a activation area for storing a program that is executed when the erasure target terminal is activated in the storage device An information output preparation step;
It is characterized by executing.
According to this feature, when the erasure target terminal is activated after erasing the data in the storage device of the erasure target terminal, the device information including the name of the device possessed by the erasure target terminal and the operation status of each of these devices is output. It is possible to reduce time and effort for confirming the device information, and thus it is possible to promote reuse of the erasure target terminal.

A data erasure program distribution device according to claim 4 of the present invention is the data erasure program distribution device according to any one of claims 1 to 3,
Payment information receiving means for receiving payment information for payment of the data erasure program usage fee from the terminal to be deleted;
The program distribution means distributes the data erasure program on condition that the payment information received by the payment information reception means can be authenticated.
According to this feature, the access user can easily pay the usage fee for the data erasure program, and the data erasure program distribution device reliably collects the data erasure program usage fee for each data erasure program distribution. can do.

A data erasure program distribution device according to claim 5 of the present invention is the data erasure program distribution device according to any one of claims 1 to 4,
Erasure target terminal storage means for storing terminal specifying information capable of specifying the erasure target terminal;
In the distribution request receiving means, a distribution request including terminal specifying information of an erasure target terminal that transmits the distribution request is received, and terminal specifying information included in the received distribution request is registered in the erasure target terminal storage means. Registration determination means for determining whether or not
With
The program distribution unit distributes the data erasure program to the erasure target terminal that is the transmission source of the received distribution request on the condition that the terminal determination information is determined to be registered by the registration determination unit. It is characterized by that.
According to this feature, since the data erasure program is distributed only to the erasure target terminal registered in the data erasure program distribution device and the data erasure is performed, the data of the terminal that does not require the data erasure is erased. The occurrence of inconvenience can be prevented as much as possible.

A data erasure program distribution device according to claim 6 of the present invention is the data erasure program distribution device according to any one of claims 1 to 5,
In the erasure target terminal based on the data erasure program delivered from the program delivery means,
A normal activation program saving step for storing a normal activation program for normal activation stored in the activation area of the storage device in an unused area of the storage device;
An erasing instruction receiving step for receiving either an erasing instruction for executing the erasing step or an instruction for returning to a normal startable state without executing the erasing step;
An erasure activation program included in the data erasure program for executing the erasure instruction acceptance step is stored in an activation area for storing a program executed when the erasure target terminal is activated in the storage device, and the storage An erasure preparation step for storing the data erasure program in an unused area of the apparatus and restarting the erasure target terminal;
When the erasure instruction is accepted in the erasure instruction acceptance step, the normal activation program stored in the unused area of the storage device by the normal activation program saving step is stored in the activation area of the storage device, and the erasure target terminal A return instruction execution step for restarting,
An erasure instruction execution step for executing the erasure step when the erasure instruction is accepted in the erasure instruction acceptance step;
It is characterized by executing.
According to this feature, even after the execution of the data erasure program, it is possible to return to the state before the execution of the data erasure program according to the request of the access user.

A data erasure program distribution device according to claim 7 of the present invention is the data erasure program distribution device according to claims 1 to 5,
In the erasure target terminal based on the data erasure program distributed from the program distribution means,
An erasure activation program included in the data erasure program for executing the erasure step is stored in an activation area for storing a program executed when the erasure target terminal is activated in the storage device; Storing the data erasure program in the used area, and erasing preparation step for restarting the terminal to be erased;
It is characterized by executing.
According to this feature, since the data erasure program is stored in the used area of the storage device of the erasure target terminal so that the pre-stored data and the data erasure program are mixed, the erasure target terminal is usually By starting up, it is possible to make it difficult for the access user to illegally extract the data erasure program from the storage device.

A data erasure program distribution device according to claim 8 of the present invention is the data erasure program distribution device according to claims 1 to 5,
In the erasure target terminal based on the data erasure program delivered from the program delivery means,
An erasing instruction receiving step for receiving either an erasing instruction for executing the erasing step or an instruction for returning to a normal startable state without executing the erasing step;
An erasure preparation step for storing the data erasure program in a main storage device of the erasure target terminal and causing the erasure instruction receiving step to be executed;
A return instruction execution step for ending execution of the data erasure program when the return instruction is received in the erase instruction receiving step;
An erasure instruction execution step for executing the erasure step when the erasure instruction is accepted in the erasure instruction acceptance step;
It is characterized by executing.
According to this feature, even after the execution of the data erasure program, it is possible to return to the state before the execution of the data erasure program according to the request of the access user.

  Examples of the present invention will be described below.

  FIG. 1 is a diagram showing a configuration of a data erasure program distribution system including a data erasure program distribution device (hereinafter abbreviated as a distribution device) 1 according to a first embodiment to which the present invention is applied.

  The data erasure program distribution system of the present embodiment includes an erasure target terminal 2 that can be operated by an access user connected to an Internet network 4 as a computer network via a router 3, and those erasures received via the Internet network 4. Based on the distribution request from the target terminal 2, a data erasure program capable of erasing the data in the storage device 202 of the erasure target terminal 2 with difficulty in restoration (hereinafter also referred to as complete erasure) is distributed. The distribution device 1 that executes the step of completely erasing the data in the storage device 202 included in the erasure target terminal 2 included in the data erasure program is connected to the distribution device 1 via the Internet network 4, and the distribution device 1 is connected to the erasure target terminal. Based on the payment information received from step 2, perform payment processing for the data erasure program usage fee The settlement server 5 of the eye, mainly composed of.

  As shown in FIG. 1, the distribution apparatus 1 of this embodiment includes a ROM that stores a control program for a CPU, a distribution request reception process for receiving a distribution request for a data erasure program from the erasure target terminal 2, and a data erasure program. Connected via the Internet network 4 to a control unit 101 having a CPU that executes processing programs for performing various processes such as a program distribution process distributed to the terminal 2 to be erased, and a RAM that writes and reads necessary data Data erasure program for erasing data stored in the storage device 202 of the erasure target terminal 2 with difficulty in restoration, and processing for transmitting / receiving various data to / from the erasure target terminal 2 and the settlement server 5 via the Internet 4 A storage unit 102 that stores a program, and an erasure target terminal 2 and a settlement server 5 via the Internet 4 And a communication unit 103 serving as a communication interface for transmitting and receiving data, there is a relatively high speed of arithmetic processing can be conventional server computer. That is, the storage unit 102 forms program storage means of the present invention.

  Further, in the storage unit 102 of the distribution apparatus 1, information that can identify the erasure target terminal 2, for example, terminal identification information such as a MAC (Media Access Control) address that is uniquely given to the communication interface of the erasure target terminal 2 Is stored, and based on whether or not the terminal identification information of the erasure target terminal 2 that has transmitted the distribution request is registered in the terminal identification information stored in the storage unit 102, the erasure target terminal 2 It is possible to determine whether or not the data erasure program can be distributed. That is, the memory | storage part 102 forms the deletion object terminal memory | storage means of this invention.

  As shown in FIG. 1, the erasure target terminal 2 of the present embodiment includes a ROM that stores a control program for the CPU, a process for transmitting a distribution request for a data erasure program to the distribution device 1, and a data erasure program for the distribution device 1. A CPU for executing a processing program for performing various processes such as a process for receiving data from and a process for executing a data erasing program, a control unit 201 having a RAM for writing and reading necessary data, and a data erasing program It comprises a storage device 202 from which data is erased with difficulty in recovery upon execution, a communication unit 203 as a communication interface for transmitting / receiving data to / from the distribution device 1 via the Internet network 4, and a display, keyboard, or mouse. The input / output unit 204 is a normal computer.

  In the present embodiment, the storage device 202 included in the erasure target terminal 2 is a so-called rewritable storage device such as a hard disk, and the inside of the storage device 202 is divided into at least a startup area and a data area. Yes. The boot area is a relatively small area provided at the head portion of the hard disk, and is generally called MBR (Master Boot Record). In these boot areas, a relatively small-capacity program that is executed immediately after the computer is started based on power-on or restart, specifically, an operating system composed of a large-capacity and multiple programs stored in the data area. A program for starting the system is stored.

  The data area provided in the storage device 202 is divided into a used area where data is stored and an unused area where data is not stored. In the used area in which data is stored, the above-described programs constituting the operating system, various data files created on the operating system by the access user, and the like are stored. When data is stored in all the data areas provided in the storage device 202, there is no unused area in the storage device 202.

  Here, a description will be given of a method of erasing data stored in the storage device 202 with difficulty in restoration. Specific data (for example, 0, 1 or a random value) is stored in the data area of the storage device 202 several times (once. By writing the data, the data stored in the data area is erased with difficulty in restoration. These methods include various methods such as the US Army method, the US Navy method, the US Computer Security Center method, the US National Security Agency method, the US Department of Defense method, the US Air Force method, and the North Atlantic Treaty Organization method. Needless to say, even if this method is applied, the gist of the present invention is not affected.

  Next, the flow of distributing the data erasure program in the data erasure program distribution system of the present embodiment will be described below based on the diagram shown in FIG.

  First, when the access user transmits a distribution acceptance page request indicating that a distribution acceptance page is requested to the distribution apparatus 1 by the browser software of the terminal 2 to be erased, the distribution apparatus 1 displays the distribution acceptance page request as shown in FIG. Then, the distribution acceptance page formed so that the distribution request can be input is transmitted to the terminal 2 to be erased.

  When the delivery acceptance page (see FIG. 3A) is displayed, the erasure target terminal 2 can specify the erasure target terminal 2 by operating the “completely erase” button by the access user. The distribution request including the terminal identification information is transmitted to the distribution apparatus 1, and the distribution apparatus 1 performs distribution request reception processing for receiving the transmitted distribution request. That is, the control unit 101 of the distribution apparatus 1 that performs the distribution request reception process corresponds to the distribution request reception unit of the present invention.

  The distribution apparatus 1 that has received the distribution request performs a registration determination process for determining whether or not the terminal identification information included in the received distribution request is registered in the terminal identification information stored in the storage unit 102. That is, the control unit 101 of the distribution apparatus 1 that performs the registration determination process corresponds to the registration determination unit of the present invention.

  When it is determined that the distribution apparatus 1 that has performed the registration determination process is not registered, the process ends. Further, when it is determined that it is registered, the processing is continued.

  Next, as shown in FIG. 3 (b), the distribution apparatus 1 transmits a payment acceptance page formed so that payment information can be input to the erasure target terminal 2.

  When the payment acceptance page (see FIG. 3B) is displayed, the access user enters payment information consisting of name, card number, and expiration date, and operates the “Settlement” button to delete it. The target terminal 2 transmits the payment information to the distribution device 1, and the distribution device 1 performs a payment information reception process for receiving the transmitted payment information. That is, the control unit 101 of the distribution apparatus 1 that performs the payment information reception process corresponds to the payment information reception unit of the present invention.

  The distribution apparatus 1 that has received the payment information transmits a payment request including the payment information and the usage fee for the data erasure program to the payment server 5, and the payment server 5 is based on the payment information included in the received payment request. An inquiry is made as to whether or not the usage fee can be settled, and a settlement result capable of specifying the inquired result is transmitted to the distribution apparatus 1.

  The distribution apparatus 1 that has received the settlement result ends the processing when the settlement result indicates that the settlement result cannot be settled. Further, when the settlement result indicates that settlement can be performed, a program distribution process for distributing the data erasure program stored in the storage unit 102 to the erasure target terminal 2 is performed. That is, the control unit 101 of the distribution apparatus 1 that performs the program distribution process corresponds to the program distribution unit of the present invention.

  As described above, the control unit 101 of the distribution apparatus 1 according to the present embodiment indicates that the settlement result based on the settlement information received by the settlement information receiving process can be settled, that is, the settlement information received by the settlement information receiving process is A program distribution process for distributing the data erasure program is executed on the condition that the authentication is successful.

  Further, the control unit 101 of the distribution apparatus 1 according to the present embodiment determines whether or not the terminal identification information of the erasure target terminal 2 included in the distribution request received by the registration determination process is registered in the terminal identification information of the storage unit 102. A program that determines and distributes the data erasure program to the erasure target terminal 2 that is the transmission source of the distribution request, on condition that it is determined that the terminal identification information of the erasure target terminal 2 is registered. Perform distribution processing.

  Then, the erasure target terminal 2 that has received the data processing program stores the data processing program in an unused area of the storage device 202 of the erasure target terminal 2 as shown in FIG.

  Here, the data erasing program according to the first embodiment will be described. As shown in FIG. 6A, the data erasing program includes a license indicating that data erasing based on the data erasing program is permitted. In the erasure target terminal 2, a pre-processing unit as a program executed when the data erasure program is first executed, and a storage device 202 of the erasure target terminal 2 after the execution of the pre-processing unit are arranged to be executable. An erasing unit as a program and a post-processing unit as a program that is arranged to be executable in the storage device 202 of the erasure target terminal 2 after the erasing unit is executed.

  The erasure unit is stored in the data area of the storage device 202 and is erased on the basis of execution and stored in the activation area of the storage device 202. An activation unit A that is activated to execute the execution unit A stored in the data area. Further, the post-processing unit is stored in the data area of the storage device 202, and is stored in the execution unit B that outputs device information and result information described later based on the execution, and in the startup area of the storage device 202, The activating unit B is activated immediately after the erasing target terminal 2 is activated, and executes the executing unit B stored in the data area.

  Hereinafter, detailed processing contents of the preprocessing unit, the erasing unit, and the postprocessing unit included in the data processing program will be described.

  First, the operation of the preprocessing unit will be described with reference to FIG. The control unit 201 reads the preprocessing unit stored in the unused area into the RAM, executes the preprocessing unit, and names of various devices incorporated in or connected to the erasure target terminal 2 based on the execution of the preprocessing unit. And the operation status of the device, for example, the result of the data read / write test to the RAM or hard disk, etc. are collected (Sa1).

  Then, it is determined whether or not the data erasing program includes a license (Sa2). If the data erasing program includes a license, that is, if data erasing based on the data erasing program is permitted, The process proceeds to the execution preparation process (Sa7 to Sa10).

  In the execution preparation process of the erasure unit, first, the OS activation unit stored in the activation area of the storage device 202 at the present time (normal state) is stored in the unused area of the storage device 202 (Sa7). That is, the OS boot unit corresponds to the normal boot program of the present invention. The step Sa7 corresponds to the normal activation program saving step of the present invention.

  Then, the activation unit A of the erasure unit stored in the unused area of the storage device 202 is stored in the activation area of the storage device 202 (Sa8), and the erasure unit stored in the unused area of the storage device 202 is stored. The execution unit A is stored in the unused area so that the execution unit A is activated based on the execution of the activation unit A stored in the activation area (Sa9). Further, the device information collected in Sa1 is stored in an unused area (Sa10), the erasure target terminal 2 is restarted, and the processing of the preprocessing unit is terminated (Sa11). That is, the erasure unit activation part A included in the data erasure program corresponds to the erasure activation program of the present invention. Further, steps Sa8, Sa9, and Sa11 correspond to the erase preparation step of the present invention.

  In this embodiment, as shown in FIG. 2A, when it is determined that the usage fee of the data erasure program can be settled by the settlement server 5, the data erasure based on the data erasure program is permitted. However, the present invention is not limited to this. For example, as shown in FIG. 2B, the data deletion program is distributed from the terminal 2 to be deleted. When a request is received, a data erasing program that does not include a license is immediately distributed, and the data erasing program usage fee is settled in the preprocessing unit that is executed by executing the data erasing program in the terminal 2 to be erased. By determining whether or not it is possible, the distribution apparatus 1 determines whether or not the license can be transmitted, that is, a data erasure program. It may be able to control the propriety of the ram of execution.

  Here, the processing based on the execution of the data erasing program that does not include the license will be described based on FIG. 2B and steps Sa2 to Sa6 in FIG.

  If it is determined in step Sa2 that the data erasure program does not include a license, it is determined whether a license is stored in the data area of the storage device 202 (Sa3). If it is determined that the license is stored, the license is incorporated into the data erasure program, and then the process proceeds to step Sa7 and the above-described erasure unit execution preparation process is performed (Sa7 to Sa11).

  If it is determined in step Sa3 that the license is not stored in the data area of the storage device 202, a license request is transmitted to the distribution device 1 as shown in FIG. 2B (Sa5). . The distribution apparatus 1 that has received the license request transmits a payment acceptance page to the erasure target terminal 2 as shown in FIG.

  When the payment acceptance page (see FIG. 3B) is displayed, the access user enters payment information consisting of name, card number, and expiration date, and operates the “Settlement” button to delete it. The target terminal 2 transmits the payment information to the distribution device 1, and the distribution device 1 executes a payment information reception process for receiving the transmitted payment information. That is, the control unit 101 of the distribution apparatus 1 that executes the payment information reception process corresponds to the payment information reception unit of the present invention.

  The distribution apparatus 1 that has received the payment information transmits a payment request including the payment information and the amount of the usage fee for the data erasure program to the payment server 5. The settlement server 5 authenticates whether or not the amount of the usage fee can be settled based on the settlement information included in the received settlement request, and transmits a settlement result that can specify the authenticated result to the distribution apparatus 1.

  The distribution apparatus 1 that has received the settlement result ends the processing when the settlement result indicates that the settlement result cannot be settled. When the settlement result indicates that settlement can be performed, a license distribution process for distributing the license to the erasure target terminal 2 is executed.

  Then, the erasure target terminal 2 receives the distributed license, stores the license in the unused area of the storage device 202 of the erasure target terminal 2 (Sa6), moves to the step of Sa3, and executes the data erasure program. The license is incorporated, and after passing through step Sa7, the process proceeds to the execution preparation process of the erasure unit as described above (Sa7 to Sa11).

  According to the configuration of the erasure unit included in the data erasure program of the present embodiment, the data recorded on the recording medium is obtained by allowing the access user to obtain the data erasure program not including the license by using a recording medium such as a CDROM. Even when the erasure program is executed, it is determined whether or not the usage fee of the data erasure program implemented in the preprocessing unit implemented by executing the data erasure program in the erasure target terminal 2 can be settled. Thus, the distribution apparatus 1 can control whether or not the license can be transmitted, that is, whether or not the data erasure program can be executed.

  In this way, when the preprocessing unit included in the data erasure program is executed in the erasure target terminal 2, as shown in FIG. 6B, the erasure unit executes erasure in the boot area of the storage device 202 as shown in FIG. The startup unit A is stored, the execution unit A of the erasing unit is stored in the unused area, and the restart is executed. Hereinafter, detailed processing contents of the erasure unit executed after the restart will be described with reference to FIG.

  First, the control unit 201 executes the activation unit A of the erasure unit stored in the activation area based on the restart of the erasure target terminal 2 (Sb1), and based on the execution of the activation unit A of the erasure unit, The execution unit A of the erasure unit stored in the use area is read into the RAM, and the execution unit A of the erasure unit is executed (Sb2).

  Then, based on the execution of the execution unit A of the erasure unit, the control unit 201, as shown in FIG. 6C, from the post-processing unit stored in the unused area, the device information, the OS startup unit, etc. All data necessary for continuing the process is read into the RAM (Sb3). As a result, the execution unit A of the erasing unit can continue the process with reference to only the data read into the RAM without requiring the data stored in the storage device 202.

  The control unit 201 displays a confirmation acceptance screen shown in FIG. 3C (Sb4), accepts from the access user whether or not to delete data, and confirms the acceptance result (Sb5). That is, the step Sb5 corresponds to the erasure instruction receiving step of the present invention.

  When it is accepted in the step of Sb5 that data is to be erased, the entire area of the storage device 202 is completely erased (Sb6). That is, the step Sb6 corresponds to the erasing step of the present invention. The step Sb6 corresponds to the erasure instruction execution step of the present invention.

  When complete erasure is completed, as shown in FIG. 6 (d), after the activation unit B of the post-processing unit stored in the RAM is stored in the activation area of the storage device 202 (Sb7), after being read into the RAM The execution unit B of the processing unit is stored in the data area (unused area) after erasure (Sb8). In other words, the activation unit B of the post-processing unit included in the data erasure program corresponds to the result information output activation program of the present invention. The steps Sb7 and Sb8 correspond to the result information output preparation step of the present invention. The activation unit B of the post-processing unit included in the data erasure program corresponds to the device information output activation program of the present invention. The steps Sb7 and Sb8 correspond to the device information output preparation step of the present invention.

  Further, in step Sb8, the device information read into the RAM is stored in the data area after deletion (unused area). That is, the step Sb8 corresponds to the device information recording step of the present invention.

  Further, in step Sb8, the result information including the erase date and time and the erase method, which is the current date and time read into the RAM, is stored in the data area after deletion (unused area). That is, the step Sb8 corresponds to the result information recording step of the present invention.

  Then, it restarts (Sb9) and the control part 201 performs the process of a post-processing part based on restart of the deletion object terminal 2. FIG.

  In the processing of the post-processing unit, as shown in FIG. 5B, the startup unit B of the post-processing unit stored in the startup area is executed (Sc1), and based on the execution of the startup unit B of the post-processing unit. Then, the execution unit B of the post-processing unit stored in the unused area is read into the RAM, and the execution unit B of the post-processing unit is executed (Sc2). Then, the control unit 201 reads the device information and the result information stored in the unused area based on the execution of the execution unit B of the post-processing unit, and displays the deletion result screen shown in FIG. Is output (Sc3). That is, the step of Sc3 corresponds to the result information output step of the present invention. The step of Sc3 corresponds to the device information output step of the present invention.

  Further, when it is accepted in the step of Sb5 that data erasure is not executed, the OS activation unit stored in the RAM is stored in the activation area of the storage device 202 (Sb10), and is stored in the unused area. Data (data stored by a data erasing program including a preprocessing unit, an erasing unit, a post-processing unit, device information, an OS activation unit, etc.) is completely erased (Sb11) and restarted (Sb9). That is, the steps Sb9 to Sb11 correspond to the return instruction execution step of the present invention.

  Thereafter, the control unit 201 executes the OS startup unit stored in the startup area based on the restart of the terminal 2 to be erased, and executes the OS stored in the used area based on the execution of the OS startup unit. Are loaded into the RAM and the OS execution unit is executed. That is, since the erasure target terminal 2 returns to the state before the execution of the data erasure program, the erasure target terminal 2 is normally activated at the next and subsequent activations.

  As described above, according to this embodiment, the data erasure program is distributed to these erasure target terminals 2 by receiving a distribution request from the erasure target terminal 2 such as a personal computer or a PDA used at home, work place or destination. Since the data is erased, the access user can easily erase the data in the storage device 202 without going to the location of the business that distributes or sells the data erase program. Therefore, convenience for access users can be improved. Further, the data erasure program is stored only in the distribution device 1 and is distributed to the erasure target terminal 2 that has transmitted the distribution request, and erasure of data including a part or all of the distributed data erasure program is performed. Therefore, the illegal use of the distributed data erasing program can be prevented as much as possible.

  Further, according to the present embodiment, when the erasure target terminal 2 is activated after erasing the data in the storage device 202 of the erasure target terminal 2, as shown in FIG. 3D, the result information including the erasure date and time and the erasure method Is output, so that it is possible to reduce time and effort for confirming the result information and to confirm the reliability of data erasure by the erasure method. Therefore, reuse of the storage device 202 and the erasure target terminal 2 can be promoted.

  Further, according to the present embodiment, when the erasure target terminal 2 is activated after erasing the data stored in the storage device possessed by the erasure target terminal 2, as shown in FIG. Since the device information including the operation status of each device is output, it is possible to reduce time and effort for confirming the device information, and thus it is possible to promote the reuse of the erasure target terminal 2.

  Further, according to the present embodiment, the access user can easily pay the usage fee for the data erasure program, and the data erasure program distribution apparatus 1 uses the data erasure program usage fee every time the data erasure program is distributed. Can be reliably collected.

  Further, according to the present embodiment, since the data erasure program is distributed only to the erasure target terminal 2 registered in the data erasure program distribution device 1 and the data erasure is performed, the erasure target terminal 2 that does not require data erasure. It is possible to prevent as much as possible the occurrence of inconvenience due to the deletion of the data.

  Further, according to the present embodiment, when a return instruction is received from an access user after execution of the data erasure program (when “NO” is accepted on the confirmation acceptance screen shown in FIG. 3C), the object to be erased. The storage device 202 of the terminal 2 is activated in a state before the execution of the data erasure program, that is, normally activated (normally activated by the OS activation unit and the OS execution unit as shown in FIG. 6A), When an erasure instruction is accepted (when “Yes” is accepted on the confirmation acceptance screen shown in FIG. 3C), the data in the storage device 202 can be erased. It can respond flexibly. That is, even after the execution of the data erasure program, it is possible to return to the state before the execution of the data erasure program according to the request of the access user.

  Next, a data erasure program distribution system according to the second embodiment will be described with reference to FIGS. The second embodiment corresponds to claim 7. As a feature of the second embodiment, in the first embodiment, the control unit 201 of the terminal 2 to be erased is a preprocessing unit of the data erasure program. While data erasure is started after data such as a program and result information is written in the unused area based on the execution, in the second embodiment, in the used area based on the execution of the preprocessing unit of the data erasure program. Data erasure is started after data such as a program and result information is written, that is, already stored data is overwritten. Other system configurations are the same as the data erasure program distribution system of the first embodiment. Since it is the same, description of the same part is omitted, and the characteristic part of the second embodiment which is a change from the first embodiment will be described below.

  Hereinafter, the processing contents of the data processing program in the second embodiment, which is distributed by the distribution device 1 and stored in the storage device 202 of the terminal 2 to be deleted as shown in FIG. Detailed processing contents of the pre-processing unit, the erasing unit, and the post-processing unit included in the erasing program will be described.

  First, the operation of the preprocessing unit will be described with reference to FIG. The control unit 201 reads the preprocessing unit stored in the unused area into the RAM, executes the preprocessing unit, and names of various devices incorporated in or connected to the erasure target terminal 2 based on the execution of the preprocessing unit. And the operation status of the device, for example, the results of a data read / write test to the RAM or hard disk, etc. are collected (Sd1).

  Then, it is determined whether or not the data erasure program includes a license (Sd2). If the data erasure program includes a license, that is, if data erasure based on the data erasure program is permitted, The process proceeds to the execution preparation process (Sd7 to Sd10).

  In the execution preparation process of the erasure unit, the activation unit A of the erasure unit stored in the unused area of the storage device 202 is stored in the activation area of the storage device 202 (Sd7), and is stored in the unused area of the storage device 202. The execution unit A of the stored erasure unit is stored in the used area, and the execution unit A is activated based on the execution of the activation unit A stored in the activation area (Sd8). Further, the device information collected in Sd1 is stored in the used area (Sd9), the erasure target terminal 2 is restarted, and the processing of the preprocessing unit is terminated (Sd10). Note that the data stored in the used area is overwritten and stored by the execution unit A of the erasing unit and the device information. That is, the erasure unit activation part A included in the data erasure program corresponds to the erasure activation program of the present invention. The steps Sd7, Sd8, and Sd10 correspond to the erase preparation step of the present invention.

  Note that the processing when the data erasing program not including the license is received, specifically, the processing based on the steps Sd2 to Sd6 is the same as the processing based on the steps Sa2 to Sa6 in the first embodiment. Description is omitted.

  Thus, when the preprocessing unit included in the data erasure program is executed in the erasure target terminal 2, as shown in FIG. 9B, the erasure unit executes erasure in the boot area of the storage device 202 as shown in FIG. The startup unit A is stored, the execution unit A of the erasing unit is stored in the used area, and the restart is performed. Hereinafter, detailed processing contents of the erasure unit executed after the restart will be described with reference to FIG.

  First, the control unit 201 executes the activation unit A of the erasure unit stored in the activation area based on the restart of the erasure target terminal 2 (Se1), and uses the execution unit A based on the execution of the activation unit A of the erasure unit The execution unit A of the erasure unit stored in the completed area is read into the RAM, and the execution unit A of the erasure unit is executed (Se2).

  Based on the execution of the execution unit A of the erasure unit, the control unit 201 continues the processing including the post-processing unit stored in the used area and the device information as shown in FIG. 9C. All necessary data is read into the RAM (Se3). As a result, the execution unit A of the erasing unit can continue the process with reference to only the data read into the RAM without requiring the data stored in the storage device 202.

  Next, the control unit 201 performs complete erasure of the entire area of the storage device 202 (Se4). That is, the Se4 step corresponds to the erasing step of the present invention.

  When complete erasure is completed, as shown in FIG. 9 (d), the startup unit B of the post-processing unit stored in the RAM is stored in the startup area of the storage device 202 (Se5), and is stored in the RAM. The execution unit B of the processing unit is stored in the erased data area (unused area) (Se6). In other words, the activation unit B of the post-processing unit included in the data erasure program corresponds to the result information output activation program of the present invention. The steps Se5 and Se6 correspond to the result information output preparation step of the present invention. The activation unit B of the post-processing unit included in the data erasure program corresponds to the device information output activation program of the present invention. The steps Se5 and Se6 correspond to the device information output preparation step of the present invention.

  Further, in step Se6, the device information read into the RAM is stored in the data area after deletion (unused area). That is, the step of Se6 corresponds to the device information recording step of the present invention.

  Further, in step Se6, the result information including the erase date and time and the erase method, which is the current date and time read into the RAM, is stored in the data area after deletion (unused area). That is, the step of Se6 corresponds to the result information recording step of the present invention.

  Then, it restarts (Se7) and the control part 201 performs the process of a post-processing part based on restart of the deletion object terminal 2. FIG. Note that the processing of the post-processing unit is the same as that of the first embodiment (see FIG. 5B), and thus the description thereof is omitted.

  As described above, according to this embodiment, the data erasure program is distributed to these erasure target terminals 2 by receiving a distribution request from the erasure target terminal 2 such as a personal computer or a PDA used at home, work place or destination. Since the data is erased, the access user can easily erase the data in the storage device 202 without going to the location of the business that distributes or sells the data erase program. Therefore, convenience for access users can be improved. Further, the data erasure program is stored only in the distribution device 1 and is distributed to the erasure target terminal 2 that has transmitted the distribution request, and erasure of data including a part or all of the distributed data erasure program is performed. Therefore, the illegal use of the distributed data erasing program can be prevented as much as possible.

  Further, according to the present embodiment, when the erasure target terminal 2 is activated after erasing the data in the storage device 202 of the erasure target terminal 2, as shown in FIG. 3D, the result information including the erasure date and time and the erasure method Is output, so that it is possible to reduce time and effort for confirming the result information and to confirm the reliability of data erasure by the erasure method. Therefore, reuse of the storage device 202 and the erasure target terminal 2 can be promoted.

  Further, according to the present embodiment, when the erasure target terminal 2 is activated after erasing the data stored in the storage device possessed by the erasure target terminal 2, as shown in FIG. Since the device information including the operation status of each device is output, it is possible to reduce time and effort for confirming the device information, and thus it is possible to promote the reuse of the erasure target terminal 2.

  Further, according to the present embodiment, the access user can easily pay the usage fee for the data erasure program, and the data erasure program distribution apparatus 1 uses the data erasure program usage fee every time the data erasure program is distributed. Can be reliably collected.

  Further, according to the present embodiment, since the data erasure program is distributed only to the erasure target terminal 2 registered in the data erasure program distribution device 1 and the data erasure is performed, the erasure target terminal 2 that does not require data erasure. It is possible to prevent as much as possible the occurrence of inconvenience due to the deletion of the data.

  Further, according to the present embodiment, as shown in FIG. 9B, by storing the data erasure program in the used area of the storage device 202 of the terminal 2 to be erased, the data stored in advance and the data erasure are stored. Since the programs are mixed, it is difficult for the access user to illegally extract the data erasure program from the storage device when the erasure target terminal 2 is normally activated.

  Next, a data erasure program distribution system according to the third embodiment will be described with reference to FIGS. The third embodiment corresponds to claim 8. The feature of the third embodiment is that in the first embodiment, the control unit 201 of the terminal 2 to be erased is a pre-processing unit of the data erasure program. On the basis of execution, data such as a program and result information is written in an unused area, and then data erasure is started after restarting. In the second embodiment, execution of the preprocessing unit of the data erasure program is executed. After the data such as the program and result information is written in the main storage device (RAM), the data erasing is started without restarting. Other system configurations are the same as those in the first embodiment. Since it is the same as the data erasure program delivery system, the description of the same part is omitted, and the characteristic part of the third embodiment which is a change from the first embodiment will be described below.

  Here, the configuration of the erasing unit of the data erasing program in the present embodiment will be described. As shown in FIG. 12A, the erasing unit of the data erasing program is configured only by the execution unit A that performs data erasing. .

  Hereinafter, the processing contents of the data processing program according to the third embodiment that is distributed by the distribution device 1 and stored in the storage device 202 of the terminal 2 to be deleted as shown in FIG. Detailed processing contents of the pre-processing unit, the erasing unit, and the post-processing unit included in the erasing program will be described.

  First, the operation of the preprocessing unit will be described with reference to FIG. The control unit 201 reads the preprocessing unit stored in the unused area into the RAM, executes the preprocessing unit, and names of various devices incorporated in or connected to the erasure target terminal 2 based on the execution of the preprocessing unit. And the operation status of the device, for example, the result of the data read / write test to the RAM or hard disk, etc. are collected (Sf1).

  Then, it is determined whether or not the data erasure program includes a license (Sf2). If the data erasure program includes a license, that is, if data erasure based on the data erasure program is permitted, The process proceeds to execution preparation processing (Sf7 to Sf9).

  In the execution preparation process of the erasure unit, the execution unit A and the post-processing unit of the erasure unit stored in the unused area of the storage device 202 are read into the RAM (Sf7), and the device information collected in Sf1 is stored in the RAM. Read (Sf8). As a result, the execution unit A of the erasing unit can continue the process with reference to only the data read into the RAM without requiring the data stored in the storage device 202.

  Thereafter, when the preprocessing unit executes the execution unit A of the erasing unit read into the RAM (Sf9), the process proceeds to the erasing unit without restarting. That is, step Sf9 corresponds to the erase preparation step of the present invention.

  Note that the processing when the data erasing program not including the license is received, specifically, the processing based on the steps Sf2 to Sf6 is the same as the processing based on the steps Sa2 to Sa6 in the first embodiment. Description is omitted.

  As described above, when the preprocessing unit included in the data erasure program is executed in the erasure target terminal 2, as shown in FIG. 12B, the execution unit A of the erasure unit is stored in the RAM as the execution preparation process of the erasure unit. The post-processing unit and device information are read and the execution unit A of the erasing unit is executed, whereby the processing of the erasing unit is performed. The detailed processing contents of the erasing unit will be described with reference to FIG.

  First, the control unit 201 displays a confirmation acceptance screen shown in FIG. 3C (Sg1), accepts from the access user whether or not to delete data, and confirms the acceptance result (Sg2). That is, the step of Sg2 corresponds to the erasure instruction receiving step of the present invention.

  When it is accepted in the step of Sg2 that data is to be erased, the entire area of the storage device 202 is completely erased (Sg3). That is, the step of Sg3 corresponds to the erasing step of the present invention. The step of Sg3 corresponds to the erase instruction execution step of the present invention.

  When complete erasure is completed, as shown in FIG. 12 (d), the startup unit B of the post-processing unit stored in the RAM is stored in the startup area of the storage device 202 (Sg4), and the execution unit B of the post-processing unit. Are stored in the erased data area (unused area) (Sg5). In other words, the activation unit B of the post-processing unit included in the data erasure program corresponds to the result information output activation program of the present invention. The steps Sg4 and Sg5 correspond to the result information output preparation step of the present invention. The activation unit B of the post-processing unit included in the data erasure program corresponds to the device information output activation program of the present invention. The steps Sg4 and Sg5 correspond to the device information output preparation step of the present invention.

  Further, in step Sg5, the device information read into the RAM is stored in the data area after deletion (unused area). That is, the step of Sg5 corresponds to the device information recording step of the present invention.

  Further, in the step of Sg5, the result information including the erase date and time and the erase method, which is the current date and time read into the RAM, is stored in the data area after deletion (unused area). That is, the step of Sg5 corresponds to the result information recording step of the present invention.

  Then, it restarts (Sg6) and the control part 201 performs the process of a post-processing part based on restart of the deletion object terminal 2. FIG. Note that the processing of the post-processing unit is the same as that of the first embodiment (see FIG. 5B), and thus the description thereof is omitted.

  Further, when it is accepted in the step of Sb5 that the data is not erased, the data stored in the unused area (the data stored by the data erasing program including the pre-processing unit, the erasing unit, the post-processing unit, etc.) ) Is completely erased (Sg7) and restarted (Sg6). That is, steps Sg7 to Sg6 correspond to a return instruction execution step.

  Thereafter, the control unit 201 executes the OS startup unit stored in the startup area based on the restart of the terminal 2 to be erased, and executes the OS stored in the used area based on the execution of the OS startup unit. Are loaded into the RAM and the OS execution unit is executed. That is, since the erasure target terminal 2 returns to the state before the execution of the data erasure program, the erasure target terminal 2 is normally activated at the next and subsequent activations.

  As described above, according to this embodiment, the data erasure program is distributed to these erasure target terminals 2 by receiving a distribution request from the erasure target terminal 2 such as a personal computer or a PDA used at home, work place or destination. Since the data is erased, the access user can easily erase the data in the storage device 202 without going to the location of the business that distributes or sells the data erase program. Therefore, convenience for access users can be improved. Further, the data erasure program is stored only in the distribution device 1 and is distributed to the erasure target terminal 2 that has transmitted the distribution request, and erasure of data including a part or all of the distributed data erasure program is performed. Therefore, the illegal use of the distributed data erasing program can be prevented as much as possible.

  Further, according to the present embodiment, when the erasure target terminal 2 is activated after erasing the data in the storage device 202 of the erasure target terminal 2, as shown in FIG. 3D, the result information including the erasure date and time and the erasure method Is output, so that it is possible to reduce time and effort for confirming the result information and to confirm the reliability of data erasure by the erasure method. Therefore, reuse of the storage device 202 and the erasure target terminal 2 can be promoted.

  Further, according to the present embodiment, when the erasure target terminal 2 is activated after erasing the data stored in the storage device possessed by the erasure target terminal 2, as shown in FIG. Since the device information including the operation status of each device is output, it is possible to reduce time and effort for confirming the device information, and thus it is possible to promote the reuse of the erasure target terminal 2.

  Further, according to the present embodiment, the access user can easily pay the usage fee for the data erasure program, and the data erasure program distribution apparatus 1 uses the data erasure program usage fee every time the data erasure program is distributed. Can be reliably collected.

  Further, according to the present embodiment, since the data erasure program is distributed only to the erasure target terminal 2 registered in the data erasure program distribution device 1 and the data erasure is performed, the erasure target terminal 2 that does not require data erasure. It is possible to prevent as much as possible the occurrence of inconvenience due to the deletion of the data.

  Further, according to the present embodiment, since the terminal 2 to be erased is not restarted until the data erasure by the data erasure program is completed, it is preferable because the work time of the access user is shortened.

  Further, according to the present embodiment, when a return instruction is received from an access user after execution of the data erasure program (when “NO” is accepted on the confirmation acceptance screen shown in FIG. 3C), the object to be erased. The storage device 202 of the terminal 2 is activated in a state before the execution of the data erasure program, that is, is normally activated (normally activated by the OS activation unit and the OS execution unit as shown in FIG. When an erasure instruction is accepted (when “Yes” is accepted on the confirmation acceptance screen shown in FIG. 3C), the data in the storage device 202 can be erased. It can respond flexibly. That is, even after the execution of the data erasure program, it is possible to return to the state before the execution of the data erasure program according to the request of the access user.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, as shown in FIGS. 6D, 9D, and 12D, the result information and a program for outputting the result information to the storage device 202 after data erasure (rear) The startup unit B and the execution unit B) of the processing unit are recorded, and when the deletion target terminal 2 is started after erasing data, the result information is output. However, the present invention is not limited to this. The configuration may be such that the result information is not output after the data is erased. In this way, the configuration and processing contents of the data erase program can be simplified.

  In the embodiment, as shown in FIGS. 6 (d), 9 (d), and 12 (d), the device information and the program for outputting the device information to the storage device 202 after data erasure (rear) The startup unit B and the execution unit B) of the processing unit are recorded, and the device information is output when the deletion target terminal 2 is started after erasing the data. However, the present invention is not limited to this. The configuration may be such that the result information is not output after the data is erased. In this way, the configuration and processing contents of the data erase program can be simplified.

  In the embodiment, as shown in FIG. 2A, the data erasure program is distributed on condition that the payment information can be authenticated. However, the present invention is not limited to this. For example, when a license that can be used an arbitrary number of times is purchased in advance by a company or the like, a configuration in which payment information is not acquired or authenticated is preferable. Also in such a configuration, as shown in FIG. 2 (b), when the data erasure program is acquired, the payment information is acquired and the payment information is authenticated. Usage charges can be collected.

  In the embodiment, as shown in FIG. 2A, the terminal identification information uniquely assigned to the erasure target terminal 2 is registered in the terminal identification information stored in the storage unit 102 of the distribution apparatus 1. However, the present invention is not limited to this, and may be configured to distribute regardless of the presence or absence of registration. By doing so, the processing related to program distribution in the distribution apparatus 1 can be simplified.

  Moreover, in the said Example, as shown to the flowchart of FIG.4, FIG.7, FIG.10, it is set as the structure which a data delivery program performs on condition that a data delivery program contains a license, but this invention is based on this. The configuration is not limited, and the configuration may be executed regardless of the presence or absence of a license. By doing so, the processing related to program distribution in the distribution apparatus 1 and the configuration and processing contents of the data erasure program can be simplified.

  In the first to third embodiments, the distribution device 1 is configured to distribute different single data erasure programs. However, the present invention is not limited to this, and the distribution device 1 deletes the data. Which one of the data erasure programs individually exemplified in the first to third embodiments can be selected on the distribution acceptance page transmitted to the target terminal 2 and which data erasure program is distributed from the access user In this way, the access user can select a desired data erasing program.

  Moreover, in the said Example, although the internet network 4 is applied as a computer network in this invention, this invention is not limited to this, LAN built in the company or between companies as a computer network, It is good also as a structure which applies WAN etc.

  When a LAN, WAN, or the like constructed within or between these companies is applied as a computer network, a data erasure program sales company sells or rents the distribution device 1 to a company or a company group, for example. Then, these sold or rented distribution apparatuses 1 are connected to LANs, WANs, etc. established within the company or between companies, and employees connected to the LANs, WANs, etc. established within the company or between companies. The data erasure program may be distributed from the distribution device 1 to a computer such as the above, whereby the data erasure program is stored only in the distribution device 1 and a distribution request is transmitted. The data including the data erasure program distributed to the computer of the employee who becomes the terminal 2 to be deleted Since There is carried out, it can be prevented as much as possible unauthorized use of the delivered data erasing program.

  In the above-described embodiment, the terminal specifying information is registered in advance in the storage unit 102 of the distribution apparatus 1. For example, the distribution apparatus 1 is stored in a LAN, a WAN, or the like that is built within a company or between companies. In the resource management computer that is installed and manages all the computers in these companies and corporate groups, data erasure is required based on the decision to dispose or change the user by change If the terminal identification information of the erasure target terminal is managed, the distribution device 1 is made to acquire the terminal identification information of the erasure target terminal 2 managed by these resource management computers, and the storage unit 102 of the distribution device 1 The terminal specifying information may be registered in advance in the storage unit 102 of the distribution device 1 by storing the information in the storage device 102.

It is a block diagram which shows the structure of the data deletion program delivery apparatus in a present Example of this invention. (A) is a figure which shows the flow of a process when distributing a data erasure program after payment, (b) is a figure which shows the flow of a process when performing payment after data erasure program delivery. (A) is a figure which shows an example of the top page of the data erasure program delivery site which a data erasure program delivery apparatus provides, (b) is a figure which shows an example of a payment acceptance page, (c) is an erasing part It is a figure which shows an example of the confirmation reception screen output, (d) is a figure which shows an example of the deletion result screen which a post-processing part outputs. 3 is a flowchart illustrating a flow of processing of a preprocessing unit according to the first embodiment. (A) is a flowchart which shows the flow of a process of the deletion part in Example 1, (b) is a flowchart which shows the flow of the process of the post-processing part in Examples 1-3. FIG. 3 is a diagram showing a flow of data erasure of the storage device in Embodiment 1. 10 is a flowchart illustrating a flow of processing of a preprocessing unit according to the second embodiment. 12 is a flowchart illustrating a processing flow of an erasing unit according to the second embodiment. FIG. 10 is a diagram illustrating a flow of data erasure of the storage device in the second embodiment. 10 is a flowchart illustrating a processing flow of a preprocessing unit according to the third embodiment. 14 is a flowchart illustrating a processing flow of an erasing unit according to the third embodiment. FIG. 10 is a diagram showing a flow of data erasure of a storage device in Embodiment 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Data deletion program delivery apparatus 2 Terminal to be erased 4 Internet network 5 Settlement server 101 Control part (data deletion program delivery apparatus)
102 storage unit (data erasure program distribution device)
201 Control unit (terminal to be deleted)
202 Storage device (terminal to be deleted)

Claims (8)

A distribution request receiving means for receiving a distribution request for requesting distribution of a data erasure program from an erasure target terminal operable by an access user connected via a computer network;
Program storage means for storing the data erasure program;
Program distribution means for distributing a data erasure program stored in the program storage means to the erasure target terminal that is a transmission source of the received distribution request based on reception of the distribution request;
With
Based on the data erasure program distributed from the program distribution unit, the erasure target terminal is caused to execute an erasure step of erasing data stored in the storage device included in the erasure target terminal included in the data erasure program with difficulty in restoration. A data erasure program distribution device characterized by the above. In the erasure target terminal based on the data erasure program delivered from the program delivery means,
A result information recording step of storing result information including at least one of the execution date and time of the erasing step or an erasing method in the storage device after data erasure; and
A result information output step for outputting the result information stored in the storage device after data erasure in the result information recording step;
A result of storing a result information output activation program included in the data erasure program for executing the result information output step in an activation area for storing a program to be executed when the erasure target terminal is activated in the storage device An information output preparation step;
The data erasure program distribution device according to claim 1, wherein: In the erasure target terminal based on the data erasure program delivered from the program delivery means,
A device information recording step for storing device information including the name of the device of the terminal to be erased and / or the operation status of each of these devices in the storage device after data erasure;
A device information output step for outputting the device information stored in the storage device by the device information recording step;
A device that stores a device information output activation program included in the data erasure program for causing the device information output step to be executed in a activation area for storing a program that is executed when the erasure target terminal is activated in the storage device An information output preparation step;
The data erasing program distribution device according to claim 1, wherein the data erasing program distribution device is executed. Payment information receiving means for receiving payment information for payment of the data erasure program usage fee from the terminal to be deleted;
4. The data according to claim 1, wherein the program distribution unit distributes the data erasure program on condition that the payment information received by the payment information receiving unit can be authenticated. Erasing program distribution device. Erasure target terminal storage means for storing terminal specifying information capable of specifying the erasure target terminal;
In the distribution request receiving means, a distribution request including terminal specifying information of an erasure target terminal that transmits the distribution request is received, and terminal specifying information included in the received distribution request is registered in the erasure target terminal storage means. Registration determination means for determining whether or not
With
The program distribution unit distributes the data erasure program to the erasure target terminal that is the transmission source of the received distribution request on the condition that the terminal determination information is determined to be registered by the registration determination unit. The data erasure program distribution device according to any one of claims 1 to 4. In the erasure target terminal based on the data erasure program delivered from the program delivery means,
A normal activation program saving step for storing a normal activation program for normal activation stored in the activation area of the storage device in an unused area of the storage device;
An erasing instruction receiving step for receiving either an erasing instruction for executing the erasing step or an instruction for returning to a normal startable state without executing the erasing step;
An erasure activation program included in the data erasure program for executing the erasure instruction acceptance step is stored in an activation area for storing a program executed when the erasure target terminal is activated in the storage device, and the storage An erasure preparation step for storing the data erasure program in an unused area of the apparatus and restarting the erasure target terminal;
When the erasure instruction is accepted in the erasure instruction acceptance step, the normal activation program stored in the unused area of the storage device by the normal activation program saving step is stored in the activation area of the storage device, and the erasure target terminal A return instruction execution step for restarting,
An erasure instruction execution step for executing the erasure step when the erasure instruction is accepted in the erasure instruction acceptance step;
The data erasing program distribution device according to claim 1, wherein the data erasing program distribution device is executed. In the erasure target terminal based on the data erasure program delivered from the program delivery means,
An erasure activation program included in the data erasure program for executing the erasure step is stored in an activation area for storing a program executed when the erasure target terminal is activated in the storage device; Storing the data erasing program in a used area, and erasing preparation step for restarting the terminal to be erased;
The data erasing program distribution device according to claim 1, wherein the data erasing program distribution device is executed. In the erasure target terminal based on the data erasure program delivered from the program delivery means,
An erasing instruction receiving step for receiving either an erasing instruction for executing the erasing step or an instruction for returning to a normal startable state without executing the erasing step;
An erasure preparation step for storing the data erasure program in a main storage device of the erasure target terminal and causing the erasure instruction receiving step to be executed;
A return instruction execution step for ending execution of the data erasure program when the return instruction is received in the erase instruction receiving step;
An erasure instruction execution step for executing the erasure step when the erasure instruction is accepted in the erasure instruction acceptance step;
The data erasing program distribution device according to claim 1, wherein the data erasing program distribution device is executed.

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