KR20050112463A - Perpetual data deleting method for hard-disk - Google Patents

Abstract

Disclosed is a method for permanently erasing data stored on a recording medium. In the method of permanently erasing data of a recording medium according to the present invention, a computer detects a physical disk and a logical disk of a computer during booting, displays a list of the detected physical disk and a logical disk on a screen, The data stored in the recording medium is permanently deleted by overwriting arbitrary characters with the data recorded in the selected physical disk or logical disk.

Description

Permanual data deleting method for hard-disk}

The present invention relates to a method for permanently deleting data stored in a recording medium such as a hard disk, and more particularly, to a method for preventing information from leaking to the outside by permanently deleting data stored in the recording medium. .

The data that companies and individuals store and manage on their hard disks often plays a role as one of the important assets for companies and individuals. In particular, when the data stored in the hard disk is information related to core technology development, information on human resources management, or sales information, the importance as an asset is even greater.

However, information, which is one of such important assets, is often easily leaked to others. For example, if an employee at a company leaves the company, returns the computer he used, or transfers a hard disk used by a company or individual to another person, the data stored on the hard disk should be completely deleted. In practice, however, data stored on the hard disk is retained and only positional information about the data is deleted.

In this way, when the hard disk from which data is deleted is leaked to another person, the deleted data can be restored, and the restored data may be exposed to others or other companies without their knowledge.

The present invention was devised to solve the above problems, and it is possible to completely delete data stored in a recording medium such as a hard disk, and to prevent the restoration of personal or corporate information to the outside. It is an object of the present invention to provide a method for permanently erasing data of a recording medium.

According to an aspect of the present invention, a method of permanently erasing data on a recording medium includes (a) in the process of booting a computer, using a physical disk mounted in the computer and a logical disk partitioned on the physical disk. Searching, (b) displaying a list of the discovered physical disks and the logical disks on screen, (c) selecting at least one of the displayed lists, and (d) selecting the physical disks and / or And overwriting any characters in the data recorded in the logical disk.

Preferably, the method of permanently erasing data on the recording medium further includes (e) loading a free operating system (Disk) into a random access memory (RAM) of the computer during the booting of the computer. In this case, the steps (a), (b), and (d) are executed based on the FreeDOS loaded in the RAM.

Meanwhile, in the method of permanently erasing data of a recording medium according to the present invention, after the power of the computer is reset so that FreeDOS is loaded into the RAM of the computer, (a) the booting of the computer, the physical disk mounted in the computer Searching for the logical disk partitioned in the physical disk; (b) displaying the searched physical disk and the list of logical disks on the screen; and (c) the physical disk selected by the user from the displayed list. And / or a deletion program for storing the DOS delete program which overwrites any character in the logical disk.

As a result, the method of permanently deleting data of a recording medium according to the present invention makes it possible to permanently delete data stored on a hard disk and to restore the data, thereby preventing important information from leaking to others or other companies.

Hereinafter, a method of permanently deleting data of a recording medium according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a flowchart illustrating a method of permanently erasing data of a recording medium according to the present invention.

A user can partition a logical disk using FDISK for a physical disk mounted on the computer, or a new logical disk using a partition program for a physical disk mounted on the computer or a logical disk partitioned on a physical disk. Can be.

FDISK is a utility included in all versions of MS-DOS (Windows) and Windows. It does the job of formatting the hard disk, logically partitioning the disk, and naming the partitioned logical disk.

In addition to setting up a newly mounted hard disk, FDISK can also be used to repartition a previously mounted hard disk. For example, if you want to set up your computer as a dual-boot system, you can divide your hard disk into two partitions and install Windows 98 on one, Linux on the other.

By the way, when partitioning a mounted hard disk using FDISK, FDISK deletes all data on the hard drive. You cannot delete existing partitions or create new ones without going through FDISK and formatting again.

However, using special partition specialist software such as Partition Magic instead of FDISK, you can create new partitions or delete existing partitions without deleting existing data. You can adjust things. In addition, specialized software, such as Partition Magic, can move files from one partition to another without removing and reinstalling files from one partition.

In a computer, a partition is a logical partition of a hard disk, which makes it appear as if the computer has multiple physical disk drives installed for different file management, multi-user management, and other purposes within the same physical disk. can do.

In general, when a hard disk is installed in a computer, the mounted hard disk is named as C: drive, and when the mounted hard disk is divided into two partitions, it is named as C: drive and D: drive. At this time, when a single CD-ROM drive is installed in the computer, the CD-ROM drive is assigned the next letter in the alphabetical order used for the hard disk. In other words, if the hard disk is divided into two logical disks, the CD-ROM drive becomes the E: drive.

The user can move a file or folder to be deleted to either logical disk partitioned by FDISK or partition specialization software. For example, the logical disk D: among the partitioned logical disk drives C: and D: may be set as the logical disk to be deleted, and a file or folder to be deleted from the disk drive C: may be moved to the disk drive D :.

On the other hand, the CD-ROM or floppy disk provided by the present invention is a physical disk mounted on the computer and the logical partition partitioned on the computer in the process of booting the computer after resetting the power of the computer to load FreeDOS in the RAM of the computer Searching for disks, displaying a list of discovered physical and logical disks on the screen, and overwriting any characters within the physical and / or logical disks selected by the user from the displayed list. The program deletes permanently.

After inserting the above CD-ROM or floppy disk into the computer and resetting the power of the computer (S102) to drive the CD-ROM drive or floppy disk drive, FreeDOS (Disk Operating System) stored in the CD-ROM or floppy disk Is loaded into the RAM of the computer (S104). Here, FreeDOS has been described as being loaded into the RAM of a computer by a CD-ROM or a floppy disk provided by the present invention, but is not limited thereto and may be implemented by another DOS bootable diskette.

The computer is booted by the CD-ROM drive or floppy disk drive, and the boot process is displayed on the monitor. An embodiment of booting from a CD-ROM or floppy disk according to the present invention is shown in FIG. 2A. At this time, the booting of the computer by CD-ROM or floppy disk is performed only when the user selects the progress of the DOS erasing program within a predetermined time, in order to give the user a choice about the progress of the DOS erasing program. If it is not selected by the user within the time, it is preferable to implement the general DOS booting by CD-ROM or floppy disk. In the drawing, the DOS deletion program is named 'VISTA'D DATA Eraser' (hereinafter, abbreviated as 'VDE'), and the selection timeout by the user is set to 15 seconds.

When the user presses a predetermined key within the set time limit, the VDE opens a predetermined menu to allow the user to decide whether to select XMS (eXtended Memory Specification) and CD-ROM as shown in FIG. 2B. to provide.

If the user selects booting by XMS and CD-ROM, the VDE searches for a physical disk mounted in the computer and a logical disk partitioned to the physical disk (S106). In this case, the VDE is preferably implemented to search for a hard disk mounted in the computer first, and search for a logical disk for one of the selected hard disks when a plurality of hard disks are found.

The VDE displays the found physical disks and logical disks on the screen (S108). 2C shows an example of a hard disk list searched by VDE, and shows that one hard disk is mounted in a computer.

In this case, the user may select a physical disk by using a direction key of the keyboard and select whether to delete the selected physical disk, whether the logical disk is partitioned in the physical disk (S110). For example, if you select a physical disk and press the Enter key on the keyboard, VDE displays a list of logical disks partitioned on the selected physical disk.

If the user chooses to delete the physical disk, the VDE preferably displays a message confirming the deletion of the physical disk on the screen of the monitor, as shown in FIG. 2D for confirmation.

When the user finally chooses to delete the physical disk or logical disk, the VDE proceeds to delete the data stored on the selected physical disk or logical disk, as shown in FIG. 2E. At this time, the VDE deletes the location information of the data stored in the selected physical disk or the logical disk, and overwrites any character to the actual data stored in the physical disk or the logical disk so that the deleted data is not recovered (S112). ). In this case, it is preferable that the VDE enables the user to cancel deletion of data even while the data stored in the selected physical disk or logical disk is in progress. For example, as shown in FIG. 2F, when the user presses [ESC] on the keyboard while the data is deleted by the VDE, the VDE displays a message on the screen confirming the cancellation of the deletion.

When the user finally selects undelete for the data in progress, VDE stops deleting data stored in the selected physical disk or logical disk. At this time, the positional information of the data that has been deleted is not restored with respect to the data that is being deleted, and thus, random characters whose data has already been overwritten are not deleted. Therefore, it is desirable to carefully select the permanent deletion of data. In order to carefully consider the deletion of the user's data, the present invention is carried out through the above-described confirmation procedure.

In addition, the VDE preferably displays information about the VDE on a screen according to a user's selection. For example, as shown in FIG. 2G, it is preferable to press the [I] key of the keyboard to display the product information on the VDE on the screen so that the user can easily grasp the product information on the VDE. In addition, VDE can display a help function on the screen that indicates how to use VDE at your discretion.

It is also desirable that VDE provides a means to terminate the progress of the data deletion program for DOS at the user's option. For example, when the user presses the [Q] key on the keyboard, VDE displays a message on the screen to confirm whether to terminate the progress of the VDE program loaded into the RAM of the computer, as shown in FIG. 2H. .

When the user finally selects the end of the process of loading the VDE program loaded into the RAM of the computer, the VDE program loaded into the RAM of the computer is in progress and the process of normal DOS by the inserted floppy disk or CD-ROM is terminated. Switch to boot.

The method of permanently erasing data of a recording medium according to the present invention searches for a physical disk and a logical disk of the computer during the booting process of the computer, and deletes the data stored in the physical disk or the logical disk selected by the user. It is easy to delete not only the data itself, but also to prevent the restoration of the deleted data, thereby preventing the leakage of important information.

Although the above has been illustrated and described with respect to the preferred embodiments of the present invention, the present invention is not limited to the above-described specific embodiments, it is usually in the art without departing from the spirit of the invention claimed in the claims. Anyone skilled in the art can make various modifications, as well as such modifications are within the scope of the claims.

1 is a flowchart illustrating a method of deleting data from a recording medium according to the present invention;

Figure 2a is a view showing an embodiment of the boot by CD-ROM or floppy disk according to the present invention,

FIG. 2B illustrates an embodiment of a menu provided by the VDE of FIG. 2A;

FIG. 2C is a diagram illustrating an example of a hard disk list searched by VDE of FIG. 2A;

FIG. 2D is a diagram illustrating an example of a deletion confirmation message of a physical disk indicated by VDE of FIG. 2A;

2E illustrates an example of a process of deleting data stored in a selected physical disk or a logical disk;

FIG. 2F is a diagram illustrating an example of an undelete confirmation message displayed by a VDE during data deletion in FIG. 2E;

2G is a view showing an example of product information displayed by the VDE, and

2H is a diagram illustrating an example of an end confirmation message displayed by a VDE.

Claims (3)

        (a) searching for a physical disk mounted in the computer and a logical disk partitioned on the physical disk in the process of booting a computer;         (b) displaying on the screen a list of retrieved physical disks and logical disks;         (c) selecting at least one of the displayed lists; And         and (d) overwriting any characters on the data recorded in the selected physical disk and / or the logical disk.         The method of claim 1, (e) loading the computer with a random operating memory (RAM) of the computer in the process of booting the computer; The step (a), the step (b), and the step (d) are carried out based on the FreeDOS loaded in the RAM. Reset your computer's power to load FreeDOS into the computer's RAM, (a) searching for a physical disk mounted in the computer and a logical disk partitioned on the physical disk in the process of booting the computer; (b) displaying on the screen a list of retrieved physical disks and logical disks; And and (c) overwriting an arbitrary character in the physical disk and / or the logical disk selected by the user among the displayed list.