Information leakage suppression device

Abstract

To provide an information leakage prevention device capable of making information in a hard disk unusable and preventing information leakage from the hard disk. [Solution] The information leakage prevention device 1 comprises a base body on which the hard disk is placed on its inner upper surface, a holder that is placed in contact with the upper surface of the hard disk and has an explosives loading section formed to penetrate the inside of the holder from the bottom to the top, a lid that is provided to cover the top surface of the explosives loading section of the holder, explosives formed within the explosives loading section so that the central portion on the hard disk side is recessed, and an ignition device that ignites the explosives.

Description

[Technical Field]

[0001] The present invention relates to an information leakage prevention device, for example, an information leakage prevention device that prevents information leakage from a hard disk. [Background technology]

[0002] Recently, various countermeasures have been proposed to prevent information leaks from hard disks. While measures have been taken to prevent intrusions into hard disks from networks, there is a need to address the issue of information leaks caused by physical theft of the computer along with the hard disk, or by the computer itself being forcibly taken away even if the theft is noticed.

[0003] For example, Patent Document 1 proposes a computer theft prevention system that utilizes the relative positions of the computer and its peripheral devices to lock the hard disk installed in the computer if the computer is stolen. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-053815 Summary of the Invention [Problem to be solved by the invention]

[0005] However, if the computer itself were to be taken away, it could be analyzed over time and internal information could be leaked.

[0006] Furthermore, in cases where it is unavoidable to quickly prevent the leakage of information from a computer, the conventional method has been to physically destroy it with a hammer or axe. However, because hard disks are made of die-cast aluminum and are covered with iron, they are relatively sturdy, and there are issues such as the risk of failing to destroy the contents or taking a long time.

[0007] Therefore, there is a demand for a more powerful and immediate means of preventing information leakage as a countermeasure against physical theft of a personal computer.

[0008] The present invention has been made to solve such problems, and has as its object to provide an information leakage prevention device that can make the information in a hard disk unusable and prevent information leakage from the hard disk. [Means for solving the problem]

[0009] In order to achieve the above object, according to one embodiment of the present invention, an information leakage prevention device for preventing information leakage from a hard disk comprises: a base body on which the hard disk is placed on its inner upper surface; a holder arranged to contact the upper surface of the hard disk, the holder having an explosives loading section formed so as to penetrate the inside of the holder from the bottom surface to the top surface; a lid portion provided to cover the top surface of the explosives loading section of the holder; explosives formed within the explosives loading section so that the central portion on the hard disk side is recessed; and an ignition device for igniting the explosives. According to one embodiment of the present invention configured as described above, when the explosive is ignited, the explosive is formed so that the center portion on the hard disk side is recessed, so that the destructive force of the explosive is concentrated on a portion of the upper surface of the hard disk on the explosive side, and the flame spreads through the upper surface of the hard disk into the hard disk. This makes it possible to immediately render the information on the hard disk unusable by igniting the explosive, thereby preventing the leakage of information from the hard disk. For example, in the case of an act of taking the hard disk itself, the information on the hard disk can be immediately rendered unusable by igniting the explosive, thereby preventing the leakage of information from the hard disk. [Effects of the Invention]

[0010] According to the information leakage prevention device of the present invention, it is possible to make the information stored in the hard disk unusable, and to prevent information leakage from the hard disk. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram showing the internal structure of a case of a personal computer in which an information leakage prevention device according to an embodiment of the present invention is installed, with the side panel removed. [Figure 2] 1 is a schematic perspective view of an information leakage prevention device according to an embodiment of the present invention; [Figure 3] 1 is an exploded perspective view of an information leakage prevention device according to an embodiment of the present invention; [Figure 4] 4 is a cross-sectional view of the information leakage prevention device according to the embodiment of the present invention, taken along line IV-IV in FIG. 2. FIG. [Figure 5] 3 is a cross-sectional view of the information leakage prevention device according to the embodiment of the present invention, taken along line VV in FIG. 2. FIG. [Figure 6] 1 is a configuration diagram showing the configuration of an information leakage prevention device according to an embodiment of the present invention; [Figure 7] 5 is a cross-sectional view of a modified example of the information leakage prevention device according to an embodiment of the present invention, taken along the same cross section as in FIG. 4. DETAILED DESCRIPTION OF THE INVENTION

[0012] An information leakage prevention device 1 according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The embodiments of the present disclosure have been described as examples, and it will be apparent to those skilled in the art that many variations, modifications, and substitutions can be made within the spirit and scope of the present invention. Therefore, the present invention is not limited to the disclosed embodiments, and various variations, modifications, etc. can be made in form and details without departing from the scope of the claims. Furthermore, the components disclosed in the specification can be freely combined.

[0013] As shown in FIG. 1, an information leakage prevention device 1 according to one embodiment of the present invention can provide a device for preventing information leakage from a hard disk. The information leakage prevention device 1 also functions as a device for destroying a hard disk 8 (see FIG. 3) to render the information stored on the hard disk unusable. For example, if a hard disk is attempted to be forcibly removed along with a PC, or if the hard disk has been forcibly removed, the information leakage prevention device 1 can instantly render the information stored on the hard disk unusable by igniting explosives within a short period of a few seconds, thereby preventing information leakage from the hard disk. The hard disk 8 generally has a lower portion made of die-cast aluminum and an upper portion made of a 0.3 mm or 0.5 mm steel plate. Therefore, it is relatively hard and difficult to destroy physically. In the following description of one embodiment of the present invention, one longitudinal side of the information leakage prevention device 1 is referred to as the front side as shown in Figure 2, and the opposite side is referred to as the rear side, and when facing the front side of the information leakage prevention device 1, the right-hand side is referred to as the right side, the left-hand side is referred to as the left side, and the upper side of the information leakage prevention device 1 is referred to as the upper side, and the lower side is referred to as the lower side.

[0014] As shown in FIG. 1, the information leakage prevention device 1 is installed in a case 3 of a personal computer (PC) 2. The PC 2 is, for example, a desktop PC placed on an office desk. The case 3 is box-shaped, and FIG. 1 shows the case 3 with its side panel removed to reveal the internal structure. The PC 2 includes a motherboard 6 on which a CPU, memory, and other components are mounted, a power supply 7 that supplies power to the motherboard 6 and a hard disk 8 (see FIG. 3), a hard disk 8, and the information leakage prevention device 1. The information leakage prevention device 1 incorporates a hard disk 8 and, as described below, is sized similarly to a 3.5-inch hard disk drive. Therefore, the information leakage prevention device 1 can be easily accommodated in a 3.5-inch drive bay 9 in the case 3 of a commercially available PC 2. As shown in FIG. 1, multiple 3.5-inch drive bays 9 are formed in the case 3. A user can, for example, install and add hard disks or other devices in these 3.5-inch drive bays 9. A cooling fan 11 and other components are also provided in the case 3. A description of the internal structure of a typical personal computer 2 will be omitted.

[0015] As shown in FIGS. 2 and 3, the information leakage prevention device 1 includes a base body 12 having a receiving portion for receiving the hard disk 8, a holder 14, and a cover portion 16.

[0016] The hard disk 8 is placed on the inner upper surface of the base body 12. When viewed from above, the base body 12 is formed in a rectangular shape, with a length (depth) in the front-to-back direction of 14.6 cm and a length (width) in the left-to-right direction of 10.2 cm. The outer size of the base body 12 is the same as that of a so-called 3.5-inch standard hard disk drive. The base body 12 is formed so that the outer peripheral portion rises from the flat base portion, and a recessed portion 12a is formed in the center portion. The recessed portion 12a forms a receiving portion for receiving the hard disk 8. The hard disk 8 is, for example, a so-called 2.5-inch standard hard disk drive. The recessed portion 12a is formed so that a small gap space is formed on the outside when, for example, a so-called 2.5-inch standard hard disk drive is placed inside. The bottom surface of the recessed portion 12a is flat and formed in a rectangular shape. For example, when a so-called 2.5-inch hard disk drive is placed inside, the top surface 8a of the hard disk 8 and the top surface 12b of the outer periphery of the base body 12 are formed to be at the same height. Therefore, the holder 14 and the base body 12 are combined with each other in a state where the holder 14 is in contact with both the top surface 8a of the hard disk 8 and the top surface 12b of the base body 12. By forming it in this way, a commercially available high-performance so-called 2.5-inch hard disk drive can be used, and the overall information leakage prevention device 1 can have the same external size as a so-called 3.5-inch hard disk drive, and can be placed in the hard disk storage slot of a general personal computer. Furthermore, because a single screw fastens the cover 16 and the base body 12 and penetrates the holder 14, it is possible to configure the information leakage prevention device 1 even if the size of the hard disk drive to be accommodated in the recess varies slightly. Although the change in overall size reduces the convenience of PC placement, it still provides a certain level of effectiveness as an information leakage prevention device.

[0017] The base body 12 is formed of a stainless steel metal member. The base body 12 forms an exhaust passage 12c that continues from the space formed between the inner surface of the base body 12 and the hard disk 8 to the outside of the base body 12. By forming the exhaust passage, when the gunpowder burns explosively, the expanding gas is exhausted through the exhaust passage 12c, and it is possible to prevent the base body 12, holder 14, and lid portion 16 from exploding and damaging surrounding objects.

[0018] The holder 14 is disposed so as to contact the upper surface of the hard disk 8. When viewed from above, the holder 14 is formed in a rectangular shape, with a length (depth) in the front-to-back direction of 14.6 cm and a length (width) in the left-to-right direction of 10.2 cm. The outer size of the holder 14 is the same as that of a so-called 3.5-inch standard hard disk drive. The holder 14 forms a flat plate. The holder 14 is formed from a stainless steel metal member.

[0019] As shown in FIGS. 4 and 5 , the holder 14 includes an explosive loading section 18 formed inside the holder 14 so as to penetrate from the bottom surface to the top surface. The explosive loading section 18 is formed in a cylindrical shape. The explosive loading section 18 is formed so as to extend linearly from the bottom surface to the top surface of the holder 14. The radius of the explosive loading section 18 is, for example, a value within a range of 5 mm to 15 mm, for example, a value within a range of 5 mm to 10 mm. The explosive loading section 18, for example, a central axis of the explosive loading section 18, is disposed so as to be perpendicular to the hard disk 8. The explosive loading section 18, for example, a central axis thereof, is disposed at a position offset from the rotation axis of the platter of the hard disk 8 when viewed from above. As a result, the explosion of the explosive in the explosive loading section 18 causes a flame to enter the hard disk 8 at a position offset from the rotation axis of the platter, effectively rendering the data stored on the platter unusable.

[0020] The lid 16 is provided to cover the upper surface of the explosive loading section 18 of the holder 14. The lid 16 is formed in a rectangular shape when viewed from above, with a length (depth) in the front-to-back direction of 14.6 cm and a length (width) in the left-to-right direction of 10.2 cm. The outer size of the lid 16 is the same as that of a so-called 3.5-inch standard hard disk drive. The lid 16 forms a flat plate. The lid 16 is made of a stainless steel metal member. Screw holes are formed near the four corners of the lid 16, and screws are inserted into each hole to pass through the holder 14 and fasten to the base body 12, firmly clamping the lid 16, holder 14, and base body 12 together. The thickness (height) of the structure in which these components are assembled together is 2.5 cm.

[0021] In this manner, the combination of the base body 12 with the hard disk 8 placed inside, the holder 14, and the lid 16 forms a rectangular shape with a depth L of 14.6 cm, a width W of 10.2 cm, and a height H of 2.5 cm, as shown in Figures 1 and 3. Therefore, this combination is formed into the same external size as a 3.5-inch standard hard disk drive.

[0022] The information leakage prevention device 1 further includes an explosive 20 placed in the explosive loading section 18, an ignition device 22 for igniting the explosive 20, a second power supply device 24, and an actuation device 30.

[0023] The explosive 20 is formed so that its central portion 20a on the hard disk 8 side is recessed within the explosive loading section 18. For example, the explosive 20 is formed so that its central portion 20a is recessed in a mortar shape (inverted cone shape). Because the central portion 20a of the explosive 20 is recessed, when the explosive 20 ignites, the impact and pressure of the explosion are concentrated in a target area 8b of the hard disk 8 opposite the recess (a circular area in front of the explosive loading section 18). For example, the explosive 20 generates a munitions effect due to the recess, concentrating the explosive energy on the surface facing the hard disk 8 and generating a powerful penetrating force. Therefore, the exploded explosive creates a hole that penetrates the iron plate on the surface of the hard disk 8, and the flames from the explosion fill the hard disk 8 all at once, burning the surface of the platter and other parts of the hard disk 8. In this way, the impact of the explosion and the heat and burning from the flames render the stored data in the storage area of ​​the hard disk 8 unusable. Furthermore, since the explosive is exploded within a stainless steel metal body formed by combining the base body 12, the holder 14, and the lid portion 16, the possibility that the explosive will directly affect the surrounding area is reduced.

[0024] As shown in FIG. 7 , the information leakage prevention device 1 may further include a conical metal liner 40 disposed between the hard disk 8 and the explosive 20 within the explosive loading section 18 and facing the upper surface of the explosive loading section 18. The metal liner 40 is, for example, a conical metal plate. The metal liner 40 is arranged to rise upward from the lower end of the explosive loading section 18. The metal liner 40 is formed to contact the lower surface of the central portion 20a that forms the recess of the explosive 20. The heating portion 22a of the ignition device 22 is disposed between the top of the metal liner 40 and the central portion 20a. By disposing the metal liner 40 in the recess of the explosive 20, when the explosive 20 explodes, the metal liner 40 liquefies to become a metal jet, which forcefully penetrates the iron plate of the hard disk 8 vertically downward as shown by arrow A2, creating an opening. At almost the same time, the flame of the explosive 20 is blown into the hard disk 8 from the opening that has been created, burning the magnetic storage section on the platter of the hard disk 8 and rendering it unusable.

[0025] The second power supply device 24 supplies power to the ignition device 22 and the actuation device 30 independently of the power supply device 7 of the personal computer 2, which supplies power to the hard disk 8. The second power supply device 24 is disposed within the case 3. The second power supply device 24 can be configured with, for example, dry cells or a battery. Therefore, even if the power to the personal computer 2 is disconnected, the second power supply device 24 can activate the ignition device 22 using a separate power supply system. The second power supply device 24 may be disposed in a space within the information leakage prevention device 1. The second power supply device 24 is electrically connected to the ignition device 22, the actuation device 30, etc. The second power supply device 24 may be electrically connected to the power supply device 7 for charging functions, etc.

[0026] The actuating device 30 includes, for example, a wire loop sensor. When the loop circuit of the electric wire 32 of the actuating device 30 is broken or disconnected, a detection unit detects that the circuit has been broken and transmits an actuation signal to the ignition device 22. As a result, for example, if an attempt is made to remove the PC 2 along with the case 3, the loop circuit of the actuating device 30 is broken, and the ignition device 22 is immediately activated. Also, for example, if an attempt is made to remove the information leakage prevention device 1 from the drive in the case 3 without following the proper procedure and remove it, the loop circuit of the actuating device 30 may be broken, and the ignition device 22 may be immediately activated. The actuating device 30 is arranged inside the case 3, and the loop circuit of the electric wire 32 is configured to return to the inside of the case 3 via a member outside the case 3. The actuation device 30 may be provided with a wireless communication unit capable of wireless communication, and may receive a predetermined actuation signal from the outside to determine actuation of the ignition device 22 and transmit the actuation signal to the ignition device 22. This allows the administrator to actuate the ignition device 22 from a remote location to prevent information leakage.

[0027] The ignition device 22 includes a heating portion 22a wound with, for example, nichrome wire. The ignition device 22 is connected to a second power supply device 24 that supplies power independently to the ignition device 22. The ignition device 22 is connected to the second power supply device 24 via a power line 22b. In FIG. 4, the power line 22b is indicated by a dashed line. The ignition device 22 is operated by a command from the operating device 30, and when electricity is applied to the heating portion 22a, the nichrome wire is heated to a high temperature, for example, about 300 to 400 degrees, thereby igniting the explosive 20. As a modification, the ignition device 22 may use an ignition ball, which is ignited by passing electricity through the ignition ball, and the explosive 20 may be ignited by the ignition ball.

[0028] The ignition device 22 functions as a control unit and controls the operation of the information leakage prevention device 1. When an activation command is received, the ignition device 22 starts energizing the heating unit 22a to ignite the explosive 20. When it determines that an activation command has not been received, the ignition device 22 is controlled not to energize the heating unit 22a. The ignition device 22 may be disposed, for example, in a position separated from the holder 14, etc., within the case 3. The ignition device 22 is electrically connected to the heating unit 22a and the second power supply device 24. Note that all or part of the ignition device 22 may be formed by a control unit such as a memory of the personal computer 2. The ignition device 22 incorporates a CPU 17 and a storage device 19 such as a memory, etc., and controls connected devices to execute predetermined control based on a predetermined control program recorded in the memory, etc. The ignition device 22 is electrically connected to the actuation device 30, the second power supply device 24, etc. These electrical connections may be established via wireless communication, etc. The ignition device 22 stores a program that can execute an operation mode in which the ignition device 22 starts energizing the heating unit 22a when an operation command is received, and a program that can execute a non-operation mode in which the ignition device 22 does not start energizing the heating unit 22a when an operation command is not received.

[0029] Next, a method for manufacturing and arranging the information leakage prevention device 1 will be described with reference to FIG.

[0030] First, a step of preparing the base body 12, the holder 14, and the cover part 16 of the information leakage prevention device 1 is performed. Next, a so-called 2.5-inch hard disk 8 is placed in the recess 12a of the base body 12. The hard disk 8 is electrically connected to the motherboard 6 and is configured so that it can be used in the same way as a normal hard disk 8.

[0031] A core having the same shape as the metal liner 40 is placed in the explosive loading section 18 of the holder 14, and liquid explosive 20 is poured above the core. After the explosive 20 cools and solidifies, the core is removed, and the heating section 22a of the ignition device 22 is placed therein. The ignition device 22 is connected to the heating section 22a via a power line 22b. The metal liner 40 is attached to the central section 20a that forms the recess of the explosive 20.

[0032] The step of combining the base body 12 on which the hard disk 8 is placed, the holder 14 with the explosives 20 and metal liner 40 loaded in the explosive loading section 18 (or not loaded if the metal liner 40 is not placed) and the lid 16, and inserting screws into the screw holes formed in the four corners to firmly fasten and fix the lid 16, holder 14 and base body 12 together is executed. The information leakage prevention device 1 is placed in the 3.5-inch drive bay 9.

[0033] The electrical wires 32 of the actuator 30 are routed in the appropriate position and the ignition device 22 is placed in a standby state.

[0034] Examples of an embodiment of the present invention may be provided in each aspect as described below.

[0035] (1) An information leakage prevention device for preventing information leakage from a hard disk, comprising: a base body on which the hard disk is placed on its inner upper surface; a holder arranged to contact the upper surface of the hard disk, the holder having an explosives loading section formed to penetrate the inside of the holder from the bottom to the top; a lid portion provided to cover the top surface of the explosives loading section of the holder; explosives formed within the explosives loading section so that the central portion on the hard disk side is recessed; and an ignition device for igniting the explosives.

[0036] (2) An information leakage prevention device as described in (1), which is provided with a metal liner formed in a cone shape facing the upper surface of the explosives loading section, and which is provided between the hard disk and the explosives within the explosives loading section.

[0037] (3) The information leakage prevention device described in (1), wherein the base body with the hard disk placed inside, the holder, and the lid are combined to form a rectangular shape with a depth of 14.6 cm, a width of 10.2 cm, and a height of 2.5 cm.

[0038] (4) The information leakage prevention device according to (1), further comprising a second power supply device that supplies power to the ignition device independently of the power supply device of the personal computer that supplies power to the hard disk.

[0039] (5) The information leakage prevention device according to (1), wherein the explosive loading portion of the holder is positioned at a position offset from the axis of the platter of the hard disk when viewed from above.

[0040] (6) The information leakage prevention device according to (1), wherein the base body forms an exhaust passage extending from a space formed between the inner surface of the base body and the hard disk to the outside of the base body. [Explanation of symbols]

[0041] 1: Information leakage control device 2: PC 7: Power supply 8: Hard disk 8a:Top surface 12: Base body 14: Holder 16: Lid 18: Gunpowder loading section 20: Gunpowder 22:Ignition device 24:Second power supply 40: Metal liner

Claims

1. An information leakage prevention device for preventing information leakage from a hard disk, a base body on which the hard disk is disposed on the inner upper surface; a holder disposed in contact with an upper surface of the hard disk, the holder including an explosives loading section formed inside the holder so as to penetrate from a lower surface to an upper surface; a lid portion provided to cover an upper surface of the explosive loading portion of the holder; an explosive formed in the explosive loading section so that a central portion on the side of the hard disk is recessed; an ignition device that ignites the explosives.

2. 2. The information leakage prevention device according to claim 1, further comprising a metal liner formed in a cone shape facing an upper surface of the explosive loading section, the metal liner being provided between the hard disk and the explosive within the explosive loading section.

3. 2. The information leakage prevention device of claim 1, wherein the combination of the base body with the hard disk placed inside, the holder, and the lid forms a rectangular shape with a depth of 14.6 cm, a width of 10.2 cm, and a height of 2.5 cm.

4. 2. The information leakage prevention device according to claim 1, further comprising a second power supply device that supplies power to said ignition device independently of a power supply device of a personal computer that supplies power to said hard disk.

5. 2. The information leakage prevention device according to claim 1, wherein the explosive loading portion of the holder is positioned at a position offset from an axis of a platter of the hard disk when viewed from above.

6. 2. The information leakage prevention device according to claim 1, wherein the base body forms an exhaust passage extending from a space formed between an inner surface of the base body and the hard disk to an outside of the base body.

Images