KR101761470B1

KR101761470B1 - Security apparatus for hard disk preventing data information leakage

Info

Publication number: KR101761470B1
Application number: KR1020150052470A
Authority: KR
Inventors: 김동범
Original assignee: 김동범
Priority date: 2015-04-14
Filing date: 2015-04-14
Publication date: 2017-07-26
Also published as: KR20160122498A

Abstract

In order to prevent information leakage from a hard disk whose use is terminated and discarded, a computer user or an administrator can prevent data information leakage that can be directly used to destroy a hard disk data storage area in a state where the hard disk is installed in the computer A plurality of nozzles for spraying liquid onto the surface of the platter are arranged in the direction of the platter, and a flow path connected to the liquid sprayer by the first liquid pipe is formed, A first solvent tank containing a first solvent capable of dissolving and diluting a lubricant layer on the surface of the platter; a flow path connected to the liquid sprayer by a second liquid pipe formed therein; A second solvent tank containing a second solvent capable of dissolving and diluting the carbon layer, and a third solvent tank A corrosive agent tank in which a corrosive agent capable of corroding cobalt is contained in a magnetic material layer formed on a lower surface of the carbon layer on the surface of the platter, a corrosive agent tank in which a liquid channel connected to the liquid sprayer is formed, A neutralizing agent tank containing a neutralizing agent capable of neutralizing the corrosive agent, and an opening / closing device provided in the first liquid pipe, the second liquid pipe, the third liquid pipe and the fourth liquid pipe.

Description

TECHNICAL FIELD [0001] The present invention relates to a hard disk security device for preventing leakage of data information.

The present invention relates to a hard disk security device for preventing data information leakage, and more particularly, to a hard disk security device for preventing leakage of data information, And more particularly to a hard disk security device for preventing leakage of data information by directly destroying a hard disk data storage area.

As a method of unrecoverably erasing the data stored in the hard disk, there are a method of physically destroying the hard disk platter so as to be irrecoverable, a method of magnetically demagnetizing the magnetic body (magnetic) layer of the hard disk, (low format format - factory formatted format), and a method of permanently deleting data using a data destruction program (eg, Acronis DriveCleanser) that employs hard disk wiping algorithms . The previous two methods are a way to disable the reuse of the hard disk, and the latter two methods are methods that can enable reuse. Physical damage (such as damage to the spindle motor, damage to the power supply, damage to the controller, damage to the head, damage to the connector, etc.) other than damage to the data storage area of the hard disk platter itself, Some scratches, submersion, high level format, damage to the boot record, damage to the file allocation system, etc., of the disk surface may be all or part of the data recovery It is not suitable as a complete data deletion method.

For the protection of information of an organization or an individual, a corporation, a public institution, a military unit, a financial institution, a group, or an individual using the computer completely deletes the data stored in the storage medium of the computer when using the computer, , Donation, etc. are very important for the management and technical aspects. This is because computers that have expired from schools, government offices, corporations, financial institutions, military units, etc. are frequently leaked in the process of being abandoned or used for sale. As a countermeasure to this, the most commonly used method in government agencies or large corporations is a method of damaging a hard disk by a digger, a crusher or a perforator. DiGaue is a device that removes magnetism from the magnetized magnetic body of a hard disk platter, and can usually be completely disassembled by giving a sufficiently large alternating force and reducing its size gradually to zero and eventually to zero. If you do not remove the hard disk case, you will not be able to remove the hard disk case. If you do not remove the hard disk case, There is an inconvenience that it is necessary to revalidate the deleted data of the defective hard disk. Also, expensive equipment must be rented or purchased, or entrusted to an external vendor with such equipment. A shredder is a device that physically damages the whole hard disk by pressure, impact, cutting, etc. It takes about 10 seconds to process one hard disk at a time, which is inefficient for processing a large amount of hard disk. In the case of partial failure of the crushing, there is a possibility of data leakage, and it is necessary to sort and separate crushed scrap according to various scrap. The crusher should be rented or purchased and operated or commissioned to an outside company. The perforator breaks the internal platter by drilling a hole in the hard disk, but it takes a long time to process a large amount of hard disk, and it is hard to damage the entire data storage area only by a partial perforation. The crusher should be rented or purchased and operated or commissioned to an outside company.

It is inefficient to rent or buy a digger, crusher or perforator directly from a company, a public institution, a military unit, a financial institution, or a group, because it takes a lot of cost and time. It is difficult to confirm 100% shredding accuracy, but it is difficult to check whether the data storage area has been processed to such an extent that computer users can not recover it, . Therefore, there is always a risk of information leakage during consignment processing.

1. Korean Patent Registration No. 10-1447424 (Apr. 29, 2014) 2. Korean Patent Registration No. 10-0932300 (2009.12.08) 3. Korean Patent Registration No. 10-0902310 (Jun. 4, 2009)

The present invention has been made to solve the above-described problems occurring when the use of a hard disk is terminated. It is an object of the present invention to provide a method and apparatus for recovering a data storage area of a hard disk platter And to provide a hard disk security device for preventing leakage of data information that can be executed by directly selecting impossible destruction.

The liquid dispenser includes a plurality of nozzles capable of spraying liquid onto a surface of a platter, the plurality of nozzles being oriented in a platter direction, a flow path connected to the liquid dispenser by a first liquid pipe is formed, A first solvent tank containing a first solvent capable of dissolving and diluting a lubricating layer on the surface of the platter, and a flow path connected to the liquid sprayer by a second liquid pipe are formed, and a carbon A second solvent tank in which a second solvent capable of dissolving and diluting the layer is accommodated; and a flow path connected to the liquid sprayer by a third liquid pipe is formed, and cobalt in a magnetic material layer formed under the carbon layer on the surface of the platter, A corrosive tank in which a corrosive agent capable of causing corrosion is housed, and a flow path connected to the liquid sprayer by a fourth liquid pipe are formed, A neutralizing agent tank containing a neutralizing agent which can be neutralized and an opening and closing device provided in the first liquid pipe, the second liquid pipe, the third liquid pipe and the fourth liquid pipe.

The first solvent tank, the second solvent tank, the corrosive tank, and the neutralizer tank may be formed of a soft resin to open the opening / closing device and inject the chemical solution while pressing the tank.

The spraying agent is further contained in the first solvent tank, the second solvent tank, the corrosive tank, and the neutralizer tank so that the pressure inside each tank is kept higher than the atmospheric pressure so that the chemical solution is injected when the opening and closing device is opened .

In order to facilitate the chemical solution injection, the liquid sprayer is connected to the first liquid pipe, the second liquid pipe, the third liquid pipe and the fourth liquid pipe between the first solvent tank, the second solvent tank, the caustic tank and the neutralizer tank A second solenoid valve, a third solenoid valve and a fourth solenoid valve are provided in the first liquid pipe, the second liquid pipe, the third liquid pipe and the fourth liquid pipe by the opening and closing device, respectively, The first solenoid valve, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are sequentially opened and closed at a predetermined time difference while the pumping means is driven, while the first and second solenoid valves, A controller for spraying a solvent, a caustic, and a neutralizing agent onto the platter surface.

According to the present invention, a computer user or an administrator can destroy a data storage area of a hard disk through direct selection and chemical solution injection operation in a state where a hard disk is installed in a computer, There is no need to rent or buy equipment and operate it. Accordingly, not only the cost and time of the HDD discard data disposal process can be saved, but also information leakage due to the HDD discard can be prevented.

1 is a schematic enlarged cross-sectional view of a hard disk platter.
2 is a block diagram of a hard disk security device for preventing data information leakage according to the first embodiment of the present invention.
3 is a block diagram of a hard disk security device for preventing data information leakage according to the second embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a hard disk security device for preventing leakage of data information according to the present invention will be described in detail with reference to the accompanying drawings.

&Lt; Embodiment 1 >

1 (a) is an enlarged sectional view of a hard disk platter 3 using an aluminum alloy substrate coated with Ni-P (nickel-phosphorous), and FIG. 1 (b) Fig. Ni-P electroless plating treatment is required for the aluminum alloy substrate to increase the surface hardness, but Ni-P electroless plating treatment is not performed because the glass substrate generally has a high surface hardness. On the substrate, a chromium base layer is sputtered to a thickness of about 50 nm to 30 nm to serve as a core grain of the magnetic layer. The magnetic material layer, which is a data storage region, is a cobalt base alloy having a thickness of about 30 nm to 20 nm which is sputtered onto the chromium base layer. The magnetic layer comprises about 70-90% cobalt. The remainder of the alloy is chromium, tantalum, or the like, which improves the coercivity of the magnetic layer to saturation coercivity. In some cases, it may contain platinum. A carbon layer having a thickness of approximately 13 nm to 7 nm is formed by sputtering on the magnetic layer even if the magnetic layer is considerably hard. The carbon layer is a magnetic layer that can occur during head landing when the power is cut off or a magnetic substance which may be generated by frequent low flying of head excursions during file operation. The carbon layer is typically 10 to 11 nm thick and is deposited and coated with a hydrogenated carbonaceous material. The lubricant layer, which is the final layer of the platter 3, is in contact with the head and disk The thickness of the lubricating layer is very thin, typically around 1-2 nm (10-20 ANGSTROM). The lubricant is generally a perfluoropolyether lubricant or a fluorine-containing lubricant, A carbon lubricant is used. In coating the lubricant, the lubricant is melted by the solvent and the disk is dipped The total thickness of the dip or sprayed lubricant is generally between about 2-3 nm thick, but a portion of the lubricant may be chemically bonded to the carbon layer In general, about 20-30% of the applied lubricant thickness penetrates the carbon layer.

The present invention in turn corrupts the lubricating layer, the carbon layer and the magnetic layer of the expired hard disk platter 3, in order to permanently render the data stored in the magnetic layer unrecoverable.

2, a hard disk security device according to an embodiment of the present invention includes a first solvent tank (not shown) containing a first solvent capable of dissolving and diluting a lubricating layer on a surface of a platter 3 A second solvent tank 13b containing a second solvent capable of dissolving and diluting a carbon layer formed under the lubricating layer on the surface of the platter 3; A corrosive agent tank 13c containing a corrosive agent capable of corroding cobalt among the formed magnetic substance layers and a neutralizer tank 13d containing a neutralizing agent capable of neutralizing the corrosive agent. As shown in FIG. 2, these tanks 13a, 13b, 13c, and 13d can be attached to one side of the hard disk.

The first solvent tank 13a, the second solvent tank 13b, the caustic tank 13c and the neutralizer tank 13d are provided with the opening and closing devices C1, C2, C3 and C4 And the chemical solution can be sprayed while compressing the respective tanks 13a, 13b, 13c, and 13d.

The first solvent is selected from the group consisting of N-methyl-2-pyrrolidone (NMP), dimethylsulfoxide (DMSO), dimethylsulfoxide, and ketone capable of dissolving perfluoropolyether lubricant or fluorocarbon lubricant, Or one or more solvents selected from a mixture of dimethylsulfoxide (DMSO) and acetone. In particular, when a proper amount of ketone is mixed in dimethylsulfoxide, the fluorine-based lubricating layer is easily dissolved at room temperature. The fluorine-based lubricant may also be a solvent used in dipping or lubrication of the lubricant during the production of the platters (3).

The second solvent is a mixture of dimethylsulfoxide (DMSO) or dimethylsulfoxide (DMSO) and oil carbon which is capable of dissolving the carbon layer. Dimethylsulfoxide (DMSO) is a solvent for use in the treatment of synthetic solvents and electronic materials for pharmaceuticals, and is widely used industrially as a solvent for preparing polymers. It is preferably used as a fluororesin lubricant, hydrogenated carbon, carbon, (carbon fiber) solvent.

The cobalt corrosion agent of the magnetic layer is an aqueous sulfuric acid solution. Dilute sulfuric acid dissolves metals such as aluminum, cobalt, chromium, copper, iron, nickel, manganese and zinc. Particularly, cobalt is not corroded by other kinds of acids but is easily corroded by aqueous sulfuric acid solution.

The sulfuric acid aqueous solution, which is a corrosive agent capable of corroding cobalt in the magnetic layer, is harmful to human body. Most of the injected sulfuric acid component reacts with cobalt to form cobalt salt and water, but there may be a residual amount in the hard disk case. This residual sulfuric acid is hardly leaked to the outside by the hard disk case, but is preferably neutralized. The neutralizing agent that can be used herein is an aqueous solution of sodium hydroxide or borate. When the solvent selected from the first and second solvents is toxic, the neutralizing agent may include the neutralizing agent.

The opening and closing devices C1, C2, C3 and C4 are manual valves or devices having the same function.

The first solvent tank 13a, the second solvent tank 13b, the corrosive agent tank 13c and the neutralizer tank 13d are connected to the first liquid pipe P1, the second liquid pipe P2, the third liquid pipe P3, And the fourth liquid pipe P4.

A number of nozzles 7 capable of spraying liquid onto the surface of the platter 3 are arranged in the liquid injector 9 so as to face the platter 3. When one hard disk includes a plurality of platters 3, the liquid ejector 9 is also stacked in the same direction as the number of the platters 3 or in a direction of one to two more.

When the platter is destroyed by using the hard disk security device of the present invention having such a configuration, the user opens the opening and closing devices C1, C2, C3, and C4 and presses the first solvent tank 13a, the second solvent tank 13b, the caustic tank 13c, and the neutralizer tank 13d are pumped at predetermined time intervals.

A jetting agent is further included in the first solvent tank 13a, the second solvent tank 13b, the caustic tank 13c and the neutralizer tank 13d to maintain the pressure in each tank higher than the atmospheric pressure, The chemical solution may be injected when the opening and closing devices C1, C2, C3, and C4 are opened. As the injection gas, it is preferable to use an inert gas such as helium, neon, or argon.

When the spray agent is accommodated in each tank together with the chemical solution, the user can destroy the platter of the hard disk by simply opening the opening / closing device.

&Lt; Embodiment 2 >

3, the present invention includes solenoid valves S1, S2, S3, and S4, pumping means 11, and second and third solenoid valves S1, S2, S3, and S4 for ejecting the first solvent, the second solvent, A controller 5 for controlling the solenoid valves S1, S2, S3, and S4 and the pumping means 11 may be provided.

The first solvent tank 13a, the second solvent tank 13b, the caustic tank 13c and the neutralizer tank 13d are connected to the first solvent tank 13a, the second solvent tank 13b, the neutralizing agent tank 13c and the neutralizing agent tank 13d, respectively, The liquid pipe P1, the second liquid pipe P2, the third liquid pipe P3 and the fourth liquid pipe P4, and the discharge side is connected to the liquid injector 9. [ The first solenoid valve S1, the second solenoid valve S2, and the second solenoid valve S1, which open and close the liquid pipe, respectively, are connected to the first liquid pipe P1, the second liquid pipe P2, the third liquid pipe P3 and the fourth liquid pipe P4, A third solenoid valve S3 and a fourth solenoid valve S4 are provided. The controller 5 is provided with a switch 21. When the switch 21 is turned on, the first solenoid valve S1, the second solenoid valve S2, the third solenoid valve S3, The pumping means 11 is driven to sequentially open and close the fourth solenoid valve S4 so that the first solvent, the second solvent, the corrosive agent, and the neutralizing agent are sufficiently supplied to the reaction through the nozzle 7 of the liquid injector 9 And sequentially sprayed onto the surface of the platter 3 at intervals of time.

And a liquid sensing sensor 15 for sensing the liquid sprayed by the liquid injector 9 when the liquid sprayer 9 contacts the liquid ejector 9 with the platter 3 as a center, To the controller (5). The controller 15 may further include a display unit having LEDs 19a, 19b, and 19c capable of displaying the ejection states of the respective liquids on the outside in accordance with signals input from the liquid sensor 15 have.

The power supply of the controller 5 and the pumping means 11 may be a power supply of the computer.

The user can unrecoverably destroy the platter of the hard disk only by operating the switch 21 of the controller 5. [

According to the present invention having such a configuration, since the data storage area of the hard disk can be destroyed through a direct selection and a chemical solution injection operation by a computer user or an administrator while the hard disk is installed in the computer, And there is no need to rent or purchase separate equipment. Accordingly, not only the cost and time of the HDD discard data disposal process can be saved, but also information leakage due to the HDD discard can be prevented.

1: Hard disk drive 3: Platter
5: Controller 7: Nozzle
9: Liquid injector 11: Pumping means
13a, 13b, 13c: liquid tank 15: liquid sensor
17: display section 19a, 19b, 19c: LED
C1, C2, C3, C4: Manual valve P1, P2, P3, P4:
S1, S2, S3, S4: Solenoid valve

Claims

A device installed in a hard disk drive and capable of directly destroying a data storage area of a hard disk platter irreversibly by a user or an administrator,
A liquid injector in which a plurality of nozzles capable of injecting liquid onto the surface of the platter are arranged in a direction of a platter;
A first solvent tank in which a flow path connected to the liquid injector is formed by a first liquid pipe and a first solvent which can be diluted by dissolving a lubricant layer on the surface of the platter is accommodated therein;
A second solvent tank in which a flow path connected to the liquid injector by a second liquid pipe is formed, and a second solvent capable of dissolving and diluting a carbon layer formed under the lubricating layer on the surface of the platter is accommodated;
A corrosive agent tank in which a flow path connected to the liquid sprayer is formed by the third liquid pipe and a corrosive agent capable of corroding cobalt among the magnetic layer formed under the carbon layer on the surface of the platter is accommodated therein;
A neutralizer tank in which a flow path connected to the liquid sprayer is formed by a fourth liquid pipe and a neutralizer capable of neutralizing the corrosive agent is accommodated therein; And
An opening / closing device which is provided in the first liquid pipe, the second liquid pipe, the third liquid pipe and the fourth liquid pipe and is opened by a user or a manager to allow the first solvent, the second solvent, the corrosive agent and the neutralizing agent to be charged into the platter surface; Lt; / RTI >
Wherein the first solvent is one or more solvents selected from N-methyl-2-pyrrolidone (NMP), dimethylsulfoxide (DMSO) or a mixture of dimethylsulfoxide (DMSO) and acetone, Is a solvent selected from the group consisting of dimethylsulfoxide (DMSO) or a mixture of dimethylsulfoxide and ketone, the corrosive agent is an aqueous solution of sulfuric acid, and the neutralizing agent is an aqueous solution of sodium hydroxide or borate. Disk security device.

delete

The method of claim 1,
Wherein the first solvent tank, the second solvent tank, the caustic tank, and the neutralizer tank further contain a jetting agent so that the pressure inside each tank is kept higher than the atmospheric pressure.

The method according to claim 1,
And a pumping means connected to the first liquid pipe, the second liquid pipe, the third liquid pipe and the fourth liquid pipe between the liquid injector and the first solvent tank, the second solvent tank, the corrosive tank and the neutralizer tank, A first solenoid valve, a third solenoid valve, and a fourth solenoid valve are provided in the first liquid pipe, the second liquid pipe, the third liquid pipe and the fourth liquid pipe, respectively, while driving the pumping means, The first solvent, the second solvent, the corrosive agent, and the neutralizing agent to the platter surface through the nozzle of the liquid sprayer while sequentially opening and closing the first solenoid valve, the second solenoid valve, the third solenoid valve, And a controller for controlling the hard disk drive to prevent the leakage of data information.