JP2011233000A - Data deletion management system and data deletion management method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that huge time and costs have been spent on an operation that a terminal manager confirms whether or not data deletion has been executed.SOLUTION: This data deletion management system is provided with: a terminal equipped with a storage device for performing writing and deletion of data; a customer server connected to the terminal; and a management server for managing data deleting situations of the storage device of the terminal. The customer server is provided with a program transmission means for distributing a data deletion program to the terminal for deleting the data stored in the storage device of the terminal, and the management server is provided with: a transmission/reception means for receiving data deletion completion notification from the terminal to notify a terminal manager that the data deletion of the storage device of the terminal is completed by executing the data deletion program; and a progress analyzing means for creating a list table in which the states of progress of the data deletion of the storage device of the terminal are gathered based on the data deletion completion notification.

Description

  The present invention relates to a data erasure management system and a data erasure management method, and more particularly to a data erasure management system and a data erasure management method for erasing data stored in a storage device of a terminal.

  In recent years, terminals represented by personal computers (hereinafter referred to as “PCs”) have become indispensable tools in companies and the like. The PC usually includes a storage device such as a hard disk, and its capacity is increasing year by year. Further, the functions of the PC are becoming more sophisticated every day, and it is preferable to introduce the latest PC according to the needs of the company.

  PCs discarded after a company introduces the latest PCs have sufficient functions to withstand normal use, and it is desirable to reuse them from the viewpoint of effective use of resources and consideration for the environment. I can say that. However, there is a case where trade secrets, personal information, and the like are stored in a PC used by a company, and it can be said that the data stored in the storage device of the PC needs to be completely erased when reused or discarded.

  Therefore, various methods have been proposed as a method for completely erasing data stored in the storage device of the PC (for example, Patent Document 1). As a method of completely erasing data stored in a storage device of a PC, a method of overwriting data a plurality of times after erasing data is known.

JP 2007-316789 A

  However, if a company or the like has multiple terminals, it will cause a big problem even if confidential data leaks from one of them, so it is necessary to manage all terminals. Such management was difficult. Specifically, even if the administrator who manages the terminal in the company instructs the user of the terminal to execute the data deletion, it is not possible to grasp whether or not the data deletion has actually been executed. There was a problem that it was difficult. In particular, when there are a large number of terminals and they are scattered at a plurality of bases, it takes a lot of time and cost to confirm the data erasure of the storage devices of all the terminals.

  The data erasure management system of the present invention includes a terminal having a storage device for writing and erasing data, a customer server connected to the terminal, and a management server for managing the data erasure status of the storage device of the terminal. In the data erasure management system, the customer server has a program transmission means for distributing a data erasure program for erasing data stored in the storage device of the terminal to the terminal. Transmission / reception means for receiving from the terminal a data erasure completion notification notifying that the data erasure of the terminal storage device has been completed by execution, and the management server, based on the data erasure completion notification, the progress of data erasure of the terminal storage device And a progress analysis means for creating a list summarizing the above.

  According to another embodiment of the present invention, a data erasure management system of the present invention includes a terminal having a storage device for writing and erasing data, a customer server connected to the terminal, and a storage in the storage device of the terminal A data erasure management system comprising an external server for erasing stored data and a management server for managing the data erasure status of the terminal storage device, wherein the customer server stores the data stored in the terminal storage device It has a program transmission means for distributing to the terminal a data erasure program for locking the storage device so that it cannot be read from the device, and the terminal locks the storage device of the terminal by executing the data erasure program, and the lock is completed A transmission means for transmitting a lock completion notification to notify the management server, and the external server executes the data erasure program A data storage completion notification is sent to the management server to notify the completion of the data erasure, and the management server receives the lock completion notification from the terminal, Receiving means for receiving a data erasure completion notification from the receiver, transmitting / receiving means for receiving from the external server a data erasure completion notice notifying that the data erasure of the terminal storage device has been completed by executing the data erasure program, a lock completion notice and data Progress status analysis means for creating a list of the progress status of the lock of the storage device of the terminal and the data erasure to be displayed on the customer server based on the erase completion notification.

  According to still another embodiment of the present invention, a data erasure management system of the present invention includes a terminal having a storage device for writing and erasing data, a customer server, and data stored in the storage device of the terminal. A data erasure management system comprising an external server to be erased and a management server for managing the data erasure status of the terminal storage device, wherein the external server executes data erasure of the terminal storage device by executing a data erasure program , Having a transmission means for transmitting a data erasure completion notification notifying that the data erasure has been completed to the management server, and the management server erasing the data erasure of the terminal storage device by executing the data erasure program Based on the transmission / reception means for receiving the completion notification from the external server and the data erasure completion notification, Characterized in that it has a progress analysis means for creating a table summarizing the Hakado situation, the.

  The data erasure management method of the present invention includes a terminal having a storage device for writing and erasing data, a customer server connected to the terminal, and a data using a management server for managing the data erasure status of the storage device of the terminal. An erasure management method in which a customer server distributes to a terminal a data erasure program for erasing data stored in the terminal storage device, and the terminal executes the data erasure program to execute the data erasure program. Erasing the data and sending a data erasure completion notification notifying that the data erasure has been completed to the management server, receiving the data erasure completion notification from the terminal, and receiving the management server Creating a list summarizing the progress of data erasure in the storage device of the terminal based on the data erasure completion notification. And wherein the Rukoto.

  According to another embodiment of the present invention, a data erasure management method according to the present invention includes a terminal having a storage device for writing and erasing data, a customer server connected to the terminal, and a storage in the storage device of the terminal. Data erasure management method using an external server for erasing the recorded data and a management server for managing the data erasure status of the terminal storage device, wherein the customer server stores the data stored in the terminal storage device Distributing to the terminal a data erasure program for locking the storage device so that it cannot be read from the device, and executing the data erasure program to lock the storage device of the terminal and notifying that the lock has been completed. A step of sending a lock completion notification to the management server, and the external server erasing data in the terminal storage device by executing a data erasure program Executing and transmitting a data erasure completion notification to inform the management server that the data erasure has been completed, and receiving the data erasure completion notification from the external server and the management server receiving the lock completion notification from the terminal, The management server has a step of creating a list of the progress of the lock of the storage device of the terminal and the data erasure to be displayed on the customer server based on the lock completion notice and the data erasure completion notice. To do.

  According to still another embodiment of the present invention, a data erasure management method of the present invention includes a terminal having a storage device for writing and erasing data, a customer server, and data stored in the storage device of the terminal. A data erasure management method using an external server to be erased and a management server for managing the data erasure status of the terminal storage device, wherein the external server executes data erasure of the terminal storage device by executing a data erasure program , A step of transmitting a data erasure completion notification notifying that the data erasure is completed, a step of receiving a data erasure completion notification from the external server, and a step of receiving the data erasure completion notification from the external server. And creating a list summarizing the progress of data erasure in the storage device of the terminal.

  According to the present invention, it is possible to easily check the progress of data erasure in the storage devices of a plurality of terminals, and it is possible to save time and cost.

1 is a configuration diagram of a data erasure system according to Embodiment 1 of the present invention. It is a flowchart which shows the procedure of the data erasing method which concerns on Example 1 of this invention. It is a list of the progress situation of data erasure concerning Example 1 of the present invention. It is a block diagram of the data deletion system which concerns on Example 2 of this invention. It is a flowchart which shows the procedure of the data erasing method which concerns on Example 2 of this invention. It is a list of the progress status of locking and data erasing of the storage device according to the second embodiment of the present invention. It is a block diagram of the data deletion system which concerns on Example 3 of this invention. It is a flowchart which shows the procedure of the data erasing method which concerns on Example 3 of this invention. It is a list of the progress situation of data erasure concerning Example 3 of the present invention.

  Hereinafter, a data erasure management system and a data erasure management method according to the present invention will be described with reference to the drawings. However, it should be noted that the technical scope of the present invention is not limited to these embodiments, but extends to the invention described in the claims and equivalents thereof.

  FIG. 1 shows a configuration diagram of a data erasing system according to Embodiment 1 of the present invention. The data erasure system according to the first embodiment includes terminals 23a to 23c having storage devices for writing and erasing data, customer servers 21 connected to the terminals 23a to 23c, and data stored in the storage devices of the terminals 23a to 23c. And a management server 1 that manages the erasure status. Here, an example in which there are three terminals will be described, but the number of terminals is not limited.

  The customer server 21 is connected to the terminals 23a to 23c by a local area network (LAN) 22 and distributes a data erasing program for erasing data stored in the storage devices of the terminals 23a to 23c to the terminals. It has a transmission means. The customer server 21 and the terminals 23a to 23c are arranged in the customer company 2.

  The data erasing program may be installed in the customer server 21 by a storage medium such as a CD-ROM, or may be downloaded through a network. The users of the terminals 23a to 23c can completely erase the data stored in the storage device of the terminal used by each user by executing the data erasing program.

  The management server 1 receives the data erasure completion notification for notifying that the data erasure of the storage devices of the terminals 23a to 23c has been completed by executing the data erasure program, and the management server receives the data erasure completion notification. And a progress analysis means 12 for creating a list summarizing the progress of data erasure in the storage device of the terminal. The list created by the progress analysis means 12 of the management server 1 is stored in the storage means 13 and can be browsed in response to a request from the customer server 21.

  The management server 1 and the customer server 21 are connected via the Internet 3, and data can be transmitted and received between the management server 1 and the customer server 21.

  Next, a data erasing method according to Embodiment 1 of the present invention will be described. FIG. 2 is a flowchart showing the procedure of the data erasing method according to the first embodiment of the present invention. First, in step S <b> 101, the customer server 21 receives a data erasure program from the management server 1 through the Internet 3. Here, instead of receiving via the Internet 3, installation may be performed using a recording medium such as a CD-ROM. Next, in step S102, the customer server 21 distributes a data erasure program for erasing data stored in the storage devices of the terminals 23a to 23c to the terminals 23a to 23c that are data erasure targets.

  Next, in step S103, the terminals 23a to 23c execute data erasure of the storage devices of the terminals 23a to 23c by executing the data erasure program. Next, in step S104, the terminal transmits a data erasure completion notification notifying that the data erasure is completed to the management server 1.

  Next, in step S105, the management server 1 receives the data erasure completion notification from the terminals 23a to 23c, and summarizes the data erasure progress status of the storage devices of the terminals 23a to 23c based on the received data erasure completion notification. The list is created and stored in the storage unit 13 of the management server 1. The created list can be viewed on the customer server 21 via the Internet 3.

  FIG. 3 shows an example of a list of data erasing progress according to the first embodiment of the present invention. In the table shown in FIG. 3, a PC name 31, a work date and time 32, a worker 33, and a status (situation) 34, which are the names of terminals whose data is to be erased, are displayed. As can be seen from FIG. 3, the status 34 of the person in charge A and the person in charge B is “PC erase” indicating that the data erasure of the storage device is completed, whereas the status 34 of the person in charge C Is “PC not erased” indicating that data erasure of the storage device is not completed. From this, the terminal manager who browsed the list through the customer server 21 can easily grasp which terminal has not completed the data erasure. Next, in step S106, the terminal whose data has been erased is taken out of the customer company 2 to be discarded.

  As described above, the terminal administrator can grasp the data erasure status of the terminal storage device by browsing the data erasure progress status of the terminal through the customer server. You can easily check the situation and save time and money for it.

  FIG. 4 shows a configuration diagram of a data erasing system according to Embodiment 2 of the present invention. FIG. 4A shows a state in which the terminal is installed in the customer company, and FIG. 4B shows a state in which the terminal for executing data erasure is carried into the facility of an external supplier. The data erasure system according to the second embodiment is stored in the terminals 23a to 23c having storage devices for writing and erasing data, the customer server 21 connected to the terminals 23a to 23c, and the storage devices of the terminals 23a to 23c. An external server 41 that erases the recorded data, and a management server 1 that manages the data erasure status of the storage device of the terminal.

  Since the customer server 21 and the management server 1 are the same as those in the first embodiment, detailed description thereof is omitted. The data erasure system according to the second embodiment is characterized in that the data erasure is executed by an external server 41 installed in the external contractor 4.

  The management server 1, the customer server 21, and the external server 41 are connected via the Internet 3, and data can be transmitted / received among the management server 1, the customer server 21, and the external server 41.

  Next, a data erasing method according to Embodiment 2 of the present invention will be described. FIG. 5 is a flowchart showing the procedure of the data erasing method according to the second embodiment of the present invention. First, in step S <b> 201, the customer server 21 receives a data erasure program from the management server 1 through the Internet 3. Here, instead of receiving via the Internet 3, installation may be performed using a recording medium such as a CD-ROM. Next, in step S202, the customer server 21 distributes to the terminals 23a to 23c a data erasure program for locking the storage device so that the data stored in the storage devices of the terminals 23a to 23c cannot be read from the storage device. To do.

  Next, in step S203, the terminals 23a to 23c lock the storage devices of the terminals 23a to 23c by executing the data erasing program. Here, the lock refers to a state where the terminal cannot be activated, or even if the terminal can be activated, the storage device cannot be accessed. Specifically, it means a state in which the password input screen is displayed after the terminal is turned on, and the contents of the storage device cannot be viewed unless the set password is input. Next, in step S <b> 204, the terminal transmits a lock completion notification notifying that the storage device has been locked to the management server 1.

  Next, in step S205, the management server 1 receives the lock completion notification from the terminals 23a to 23c, and summarizes the lock progress status of the storage devices of the terminals 23a to 23c based on the received lock completion notification. Is stored in the storage means 13 of the management server 1. The created list can be viewed on the customer server 21 via the Internet 3.

  FIG. 6 shows an example of a list of lock progress statuses of the storage device according to the second embodiment of the present invention. In the table shown in FIG. 6, a PC name 61, a work date and time 62, a worker 63, and a status (situation) 64, which are the names of terminals to be locked, are displayed. As can be seen from FIG. 6, the status 64 of the person in charge D is “PC lock” indicating that the lock of the storage device is completed, whereas the status 64 of the person in charge E is the status 64 of the storage device. “PC not locked” indicating that the lock has not been completed. From this, the terminal manager who browsed the list through the customer server 21 can easily grasp which terminal has not completed the lock. Next, in step S206, the terminal is carried out of the customer company 2 in order to erase the data of the terminal that has been locked.

  As shown in FIG. 4B, in step S <b> 207, the terminals 23 a to 23 c that have been carried out are carried into the facility of the external contractor (external organization) 4 and connected to the external server 41 through the LAN 42. The external server 41 receives the data erasing program from the management server 1 through the Internet 3. Here, instead of receiving via the Internet 3, installation may be performed using a recording medium such as a CD-ROM. Next, in step S208, the external server 41 executes data erasure of the storage devices of the terminals 23a to 23c by executing the data erasure program. Next, in step S209, the external server 41 transmits a data erasure completion notification notifying that the data erasure has been completed to the management server 1.

  Next, in step S210, the management server 1 receives the data erasure completion notification from the external server 41, and summarizes the data erasure progress status of the storage devices of the terminals 23a to 23c based on the received data erasure completion notification. A list is created and stored in the storage unit 13 of the management server 1. The created list can be viewed on the customer server 21 via the Internet 3.

  FIG. 6 shows an example of a list of progress status of data erasure according to the second embodiment of the present invention. As can be seen from FIG. 6, the status 64 of the person in charge F is “PC erasure” indicating that the data erasure of the storage device is completed, whereas the status 64 of the person in charge G is the storage device. “PC unerased” indicating that the data erasing of the PC has not been completed. From this, the terminal manager who browsed the list through the customer server 21 can easily grasp which terminal has not completed the data erasure.

  As described above, the terminal administrator can grasp the lock status and the data erasure status of the storage device of the terminal by browsing the progress of the lock and data erasure of the terminal through the customer server. The progress of data erasure of the apparatus can be easily confirmed, and the time and cost for that can be saved. Furthermore, according to the present invention, since data erasure of the terminal can be outsourced to an external company, the burden on the customer company can be reduced.

  FIG. 7 shows a configuration diagram of a data erasing system according to Embodiment 3 of the present invention. FIG. 7A shows a state in which the terminal is installed in the customer company, and FIG. 7B shows a state in which the terminal for executing data erasure is carried into the facility of an external supplier. The data erasure system according to the third embodiment includes terminals 23a to 23c having storage devices for writing and erasing data, a customer server 21, and an external server for erasing data stored in the storage devices of the terminals 23a to 23c. 41 and a management server 1 that manages the data erasure status of the storage device of the terminal.

  Since the customer server 21, the management server 1, and the external server 41 are the same as those in the second embodiment, detailed description thereof is omitted. The data erasure system according to the third embodiment is characterized in that the terminal is carried into an external contractor without locking the storage device of the terminal, and the data erasure is performed by the external server 41 installed in the external contractor 4. Yes.

  The management server 1, the customer server 21, and the external server 41 are connected via the Internet 3, and data can be transmitted / received among the management server 1, the customer server 21, and the external server 41.

  Next, a data erasing method according to Embodiment 3 of the present invention will be described. FIG. 8 is a flowchart showing the procedure of the data erasing method according to the third embodiment of the present invention. First, in step S301, the terminal manager of the customer company locks the terminals 23a to 23c in order to carry out the terminals 23a to 23c to be erased. Here, “locking” refers to the storage part of the carriage so that the terminal cannot be taken out of the storage part after the terminal is loaded on a cart (for example, security cargo) having a storage part for transporting the terminal. To lock the key. Next, in step S302, the terminals 23a to 23c are carried out to the outside of the customer company 2, and in step S303, the terminals 23a to 23c are carried into an external contractor (external organization) 4 in order to delete data from the locked terminal.

  Here, at the time of carrying out, it is preferable to manage each terminal or each carriage with a barcode. Specifically, a sticker on which a barcode is written is attached to a terminal or a carriage, the barcode is read by a barcode reader, and the read barcode data is transferred to a management server for management. Good. Detecting accidents such as theft of the terminal during transportation and managing the transportation status by conducting bar code management when the terminal is taken out from the client company and when it is brought into the outside contractor. It is possible to manage the data stored in the storage device of the terminal.

  As illustrated in FIG. 7B, in step S <b> 303, the terminals 23 a to 23 c are carried into the facility of the external supplier 4 and connected to the external server 41 through the LAN 42. The external server 41 receives the data erasing program from the management server 1 through the Internet 3. Here, instead of receiving via the Internet 3, installation may be performed using a recording medium such as a CD-ROM.

  Next, in step S304, the external server 41 executes data erasure of the storage devices of the terminals 23a to 23c by executing the data erasure program. Next, in step S305, the external server 41 transmits a data erasure completion notification notifying that the data erasure is completed to the management server 1.

  Next, in step S306, the management server 1 receives the data erasure completion notification from the external server 41, and summarizes the data erasure progress status of the storage devices of the terminals 23a to 23c based on the received data erasure completion notification. A list is created and stored in the storage unit 13 of the management server 1. The created list can be viewed on the customer server 21 via the Internet 3.

  FIG. 9 shows an example of a list of progress status of data erasure according to the third embodiment of the present invention. In the table shown in FIG. 9, a PC name 91, a work date and time 92, a worker 93, and a status (situation) 94 that are the names of terminals to be locked are displayed. As can be seen from FIG. 9, the status 94 of PC08 and PC09 is “PC erase” indicating that the data erase of the storage device is completed, whereas the status 94 of PC10 is the data of the storage device. “PC not erased” indicating that the erasing has not been completed. From this, the terminal manager who browsed the list through the customer server 21 can easily grasp which terminal has not completed the data erasure.

  As described above, the terminal administrator can grasp the data erasure status of the storage device of the terminal by browsing the progress of the lock and data erasure of the terminal through the customer server. The progress of erasure can be easily confirmed, and the time and cost for that can be saved. Furthermore, according to the present invention, the company terminal user can carry the terminal as it is to an outside contractor, so that the work load can be further reduced.

  In the present embodiment, an example is shown in which the data stored in the storage device of the terminal is erased by executing a data erasing program. On the other hand, depending on the state of the terminal, there may be a case where the data erasure program cannot be installed in the terminal, or a case where the storage device itself has failed and the data erasure program cannot access the storage device. In this way, when data erasure cannot be performed by executing the data erasure program, the storage device may be physically destroyed. The physical destruction of the storage device can be performed by taking out the storage device from the terminal and punching a metal pin or the like into a recording portion of the storage device with high pressure. By physically destroying the storage device, it is possible to make every effort to prevent leakage of data stored in the storage device.

  Further, as in the case of data erasure, the management server manages the physical destruction status of the storage device, creates a list of the physical destruction progress status, and can be viewed from the customer server. Good. In addition, a photograph of the storage device after physical destruction is stored in the management server so that it can be actually confirmed whether or not physical destruction has actually occurred, and the result of physical destruction of the storage device is transmitted via the Internet. It may be possible to browse from a customer server or the like.

DESCRIPTION OF SYMBOLS 1 Management server 11 Transmission / reception means 12 Progress status analysis means 13 Storage means 21 Customer server 23a-23c Terminal 3 Internet 41 External server

Claims (6)

A terminal having a storage device for writing and erasing data;
A customer server connected to the terminal;
A data erasure management system comprising a management server for managing the data erasure status of the storage device of the terminal,
The customer server has a program transmission means for distributing to the terminal a data erasing program for erasing data stored in the storage device of the terminal,
The management server
Transmission / reception means for receiving from the terminal a data erasure completion notification notifying that data erasure of the storage device of the terminal is completed by execution of the data erasure program;
The management server creates a list that summarizes the progress of data erasure in the storage device of the terminal based on the data erasure completion notification;
A data erasure management system comprising: A terminal having a storage device for writing and erasing data;
A customer server connected to the terminal;
An external server for erasing data stored in the storage device of the terminal;
A data erasure management system comprising a management server for managing the data erasure status of the storage device of the terminal,
The customer server has a program transmission means for delivering a data erasure program for locking the storage device to the terminal so that the data stored in the storage device of the terminal cannot be read from the storage device,
The terminal has a transmission means for executing a lock on the storage device of the terminal by executing the data erasing program and transmitting a lock completion notification notifying that the lock is completed to the management server,
The external server has a transmission means for executing data erasure of the storage device of the terminal by execution of the data erasure program and transmitting a data erasure completion notification notifying that the data erasure is completed to the management server,
The management server
Receiving means for receiving the lock completion notification from the terminal and receiving the data erasure completion notification from the external server;
A transmission / reception means for receiving from the external server a data erasure completion notification notifying that the data erasure of the storage device of the terminal is completed by executing the data erasure program;
Based on the lock completion notification and the data erasure completion notification, a progress analysis means for creating a list of the storage device lock and data erasure progress of the terminal for display on the customer server;
A data erasure management system comprising: A terminal having a storage device for writing and erasing data;
A customer server,
An external server for erasing data stored in the storage device of the terminal;
A data erasure management system comprising a management server for managing the data erasure status of the storage device of the terminal,
The external server executes data erasure of the storage device of the terminal by executing the data erasure program, and has a transmission means for transmitting a data erasure completion notification notifying that the data erasure is completed to the management server,
The management server
A transmission / reception means for receiving from the external server a data erasure completion notification notifying that the data erasure of the storage device of the terminal is completed by executing the data erasure program;
Based on the data erasure completion notification, progress analysis means for creating a list that summarizes the data erasure progress of the storage device of the terminal;
A data erasure management system comprising: A terminal having a storage device for writing and erasing data;
A customer server connected to the terminal;
A data erasure management method using a management server for managing the data erasure status of the storage device of the terminal,
A customer server delivering a data erasure program for erasing data stored in a storage device of the terminal to the terminal;
The terminal performs data erasure of the storage device of the terminal by executing the data erasure program, and transmits a data erasure completion notification notifying that data erasure is completed to the management server;
The management server receiving the data erasure completion notification from the terminal;
The management server creates a list summarizing the progress of data erasure in the storage device of the terminal based on the received data erasure completion notification;
A data erasure management method comprising: A terminal having a storage device for writing and erasing data;
A customer server connected to the terminal;
An external server for erasing data stored in the storage device of the terminal;
A data erasure management method using a management server for managing the data erasure status of the storage device of the terminal,
A customer server delivering to the terminal a data erasure program for locking the storage device so that data stored in the storage device of the terminal cannot be read from the storage device;
The terminal executes a lock of the storage device of the terminal by executing the data erasing program, and sends a lock completion notification notifying that the lock is completed to the management server;
An external server performs data erasure of the storage device of the terminal by executing the data erasure program, and transmits a data erasure completion notification notifying that data erasure is completed to the management server;
The management server receiving the lock completion notification from the terminal and receiving the data erasure completion notification from the external server;
The management server, based on the lock completion notification and the data erasure completion notification,
Creating a list of progress of locking and data erasure of the terminal storage device for display on the customer server;
A data erasure management method comprising: A terminal having a storage device for writing and erasing data;
A customer server,
An external server for erasing data stored in the storage device of the terminal;
A data erasure management method using a management server for managing the data erasure status of the storage device of the terminal,
An external server performs data erasure of the storage device of the terminal by executing the data erasure program, and transmits a data erasure completion notification notifying that data erasure is completed to the management server;
The management server receiving the data erasure completion notification from the external server;
The management server creates a list summarizing the progress of data erasure in the storage device of the terminal based on the received data erasure completion notification;
A data erasure management method comprising:

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