KR20010061371A - Apparatus Of Protecting Data Of Cryptographic Device From Opening For Personal Computer - Google Patents

Abstract

PURPOSE: A security device of an encoder mounted on a personal computer is provided to prevent a leakage of important information by promptly sensing that an external invasion is generated, thereby removing encoding related information stored in a memory. CONSTITUTION: A data encoding logic unit(12) and a memory for storing encoding related information(14) are installed on a board(10) of an encoder. Another parts except a part, to which an edge connector(6) is protruded, are built in a protection case(4). A recharge battery for power supply(20) is equipped on the board(10) in order to maintain data of the memory for storing encoding related information(14). The inner side of a protection case(4) is contacted to the upper side of the board(10). In case that a part of the protection case(4) is separated, a plurality of case sensing push button switches(30a¯30d) which perform an off-operation are equipped. The case sensing push button switches(30a¯30d) are successively connected to a power supply circuit line.

Description

Security device of encryption apparatus for personal computer deployment {Apparatus Of Protecting Data Of Cryptographic Device From Opening For Personal Computer}

The present invention relates to a security device for a personal computer-mounted encryption device, and more particularly, to open or break a computer case or an encryption device for the purpose of extracting or cutting off information by providing an external intrusion detection function and information deletion function to the encryption device. The present invention relates to a security device for a personal computer-mounted encryption device which increases the security of the encryption device by automatically detecting it and preventing leakage of an encryption key or encryption-related information stored in the encryption device.

As is well known, a conventional personal computer-mounted encryption device uses an open encryption algorithm (encryption key), so that encryption-related information is not stored in the encryption device internal memory, but is encrypted and stored. In other words, the conventional personal computer-mounted encryption device adopts a method in which the stored information is erased when the system power is turned off while the system power is supplied, so that any information can be obtained even when the system is not in use. none. Therefore, there was no need to protect the encryption device, so there was no consideration of a device that protects the device itself in hardware.

As such, since a computer-mounted encryption device is not hardware-protected, an operation such as opening or removing a case of the encryption device and attaching a wiretap device may be performed, which may cause information to be leaked while the system is in use. will be.

In addition, since encryption-related information such as an encryption key is stored in a hard disk, the encrypted data contents are exposed when the case of the computer body is opened, the hard disk is taken out, information is extracted, and then decrypted.

The present invention has been made in order to solve the above problems, and if there is an external intrusion such as disassembling the main body of the personal computer or the encryption device for the purpose of eavesdropping or stealing information, the present invention immediately detects and stores the encryption related to the encryption. It is an object of the present invention to provide a security device for a personal computer-mounted encryption device that allows information to be deleted itself.

1 is a diagram showing the configuration of a security device of an encryption device according to the present invention.

Figure 2 is a cross-sectional view of Figure 1

3 is a left cross-sectional view of FIG.

4 is a view showing in detail the structure of the sliding board and the cover sensing push button switch mounted thereon of FIG.

<Explanation of symbols for the main parts of the drawings>

2: computer body cover 4: protective case

4a: Hole 6: Edge Connector

10 board 12 data encryption logic section

14: memory for storing information 16: long hole

20: battery

30a, 30b, 30c, 30d: Case Sensing Pushbutton Switches

40: cover detection pushbutton switch 50a, 50b: conductor strip

60: sliding board 70: screw

80: power (+) test point 82: ground (-) test point

PL: power circuit

In order to achieve the above object, the present invention provides a data encryption logic section and a memory for storing information related to encryption, so that a portion other than the edge connector protrudes is embedded in a protective case. An apparatus, comprising: a rechargeable battery for supplying power for preserving data of a memory for storing encryption-related information on the substrate, the side inner surface or the upper side of the protective case at any point on the upper surface of the substrate on which the encryption logic portion and the memory are placed; A plurality of case detection pushbuttons that are turned on when at least one of the protective case parts is kept in a packaged state while contacting at least one of the inner surfaces, and turned off when the corresponding protective case part is separated. With switches, the battery and multiple case-sensitive pushbutton switches The case sensing pushbutton switch is connected to the memory while the positions are sequentially connected to the power circuit line.

The case sensing pushbutton switches are installed at least adjacent to the four corners of the substrate, and have at least three sides of the substrate by sequentially connecting adjacent case sensing pushbutton switches with a power circuit line in a closed curve shape surrounding the outermost side of the substrate. The power supply circuit line is preferably closed so that the power supply circuit line is disconnected when the encryption device is cut from the outside at the portion where the power supply circuit line passes.

In addition, the present invention is a means for cutting off the power from the battery to the memory when the computer body cover is detached, by forming a hole in the protective device of the encryption device off when the cover is removed from the hole ( OFF) installs an actuating cover sensing pushbutton switch, the power circuit line connecting its cover sensing pushbutton switch from one of the case sensing pushbutton switches to the other case sensing pushbutton switch, or the last case sensing pushbutton switch; The power supply circuit line may be interrupted by the cover sensing pushbutton switch by connecting to one of the power circuit lines connected from the button switch to the memory.

In addition, two conductor strips are disposed on one side of the substrate in a state where they are spaced apart from each other, and both sides of a power circuit line to be connected to the cover sensing pushbutton switch are connected to the conductor strips, respectively, in the longitudinal direction of the upper surface of the conductor strip. Mounting the sliding board in a state capable of being fixed to the substrate through the screw means at any point according to, and attaching the cover sensing pushbutton switch to its sliding board is characterized in that it is configured to connect to the conductor strip.

In addition, a plurality of power (+) test points and ground (-) test points connected to the battery are disposed on the substrate in close proximity to each other, so that a short circuit occurs when a conductor contacts these test points.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

1 to 3 are diagrams showing the configuration of a security device of an encryption device according to the present invention.

As shown in the figure, a personal computer-mounted encryption device is provided with a data encryption logic section 12 and an encryption-related information storage memory 14 on a substrate 10 of an encryption device, thereby providing an edge connector (often a slot, or A part other than where the 6) protrudes takes a structure in which the protective case 4 is incorporated. The memory 14 is usually a static random access memory (SRAM). The substrate 10 is provided with a rechargeable battery 20 for supplying power for preserving data of the encryption-related information storage memory 14 and the substrate in which the encryption logic unit 12 and the memory 14 are placed. The side of the protective case 4 maintains its packaging while being in contact with the side inner surface of the protective case 4 on one side of the upper surface thereof, and is ON when the switch is pressed and OFF when the switch is released. Two case-sensitive push button switches 30a and 30b are provided, and the upper surface of the protective case 4 is kept on the packaging while being in contact with the upper inner surface of the protective case 4 while the switch is pressed. ON) and when it is disengaged, the structure is equipped with two case-sensitive push button switches 30c and 30d which are turned off.

In addition, the case sensing push button switches 30a to 30d are sequentially connected from the battery 20 to the power circuit line PL, and a case sensing push button switch 30b connected to the memory 14 is finally connected to the memory 14. It has a connected configuration. As a result, when a portion of the power circuit line PL is cut off, power to the memory 14 is cut off so that the encrypted information stored in the memory 14 is volatilized.

Here, the case sensing push button switches 30a to 30d may be installed more in many places for more complete security, but as shown, the case sensing push button switches 30a to 30d are at least the substrate. 10, and one of the case sensing pushbutton switches 30a to 30d installed at the four corners, that is, the switch 30a is connected to the power circuit line (10). PL), and the remaining case sensing pushbutton switches 30c, 30b, and 30d are sequentially connected in an adjacent order so that the power circuit line PL surrounds the outermost portion of the substrate 10. It consists of. Thus, at least three sides (left, right, and bottom sides in the example shown in FIG. 1) of the substrate 10 are closed by the power supply circuit line PL so that the encryption device at the portion where the power supply circuit line PL passes. Is cut off from the outside, the power supply circuit line (PL) is cut off.

In addition, the present invention also includes a means for disconnecting power from the battery 20 to the memory 14 when the computer body cover 2 is detached, which is the encryption device protective case 4 In the hole 4a, a cover detecting pushbutton switch 40 is installed in the hole 4a to turn off when the computer body cover 2 is detached. A power circuit line PL connecting 40 to one case sensing pushbutton switch from one of the case sensing pushbutton switches 30a to 30d, or the last case sensing push of the switch as shown in the illustrated embodiment. It is connected to the power supply circuit line PL connected from the button switch 30b to the memory 14, and the cover sensing pushbutton switch 40 has the structure which interrupts the power supply circuit line PL. All. In FIG. 1, reference numeral 2a denotes a back panel bracket of the computer main body.

Also, referring to FIG. 4 in parallel with FIGS. 1 to 3-the top view in FIG. 4 is a top view and the bottom view is a front view-a connection structure between the cover sensing pushbutton switch 40 and the memory 14. That is, the connection structure with the power supply circuit line PL is shown. Two conductor strips 50a and 50b are disposed on one side of the substrate 10 in a state where they are spaced apart from each other, and the cover sensing pushbutton switch is disposed. Both sides of the power supply circuit line PL to be connected to 40 are connected to the conductor strips 50a and 50b, respectively, and a sliding board 60 is mounted on the upper surface of the conductor strips 50a and 50b. The cover sensing pushbutton switch 40 is attached to the sliding board 60, and the cover sensing pushbutton switch 40 is connected to the conductor strips 50a and 50b through the sliding board 60. . In the illustrated embodiment, the conductor wires 62a and 62b connected to the conductor strips 50a and 50b are inserted into the sliding board 60 and the ends of the conductor wires 62a and 62b are sensed by the cover. The pushbutton switch 40 is connected. In addition, a long hole 16 is formed between the two conductor strips 50a and 50b on the substrate 10 to pass the screw 70 through the long hole 16 to fix the sliding board 60. I'm trying to. Thus, by adjusting the position of the sliding board 60 so that the cover detection pushbutton switch 40 contacts the inner surface of the computer cover 2 according to the size of the computer and then turns it into a screw 70. To be fixed.

Furthermore, the present invention has a structure in which the power supply (+) test point 80 and the ground (-) test point 82 connected to the battery 20 are disposed in close proximity to the substrate 10 in various places. When the test points 80 and 82 thereof simultaneously touch the conductor, the battery 20 power is short-circuited.

In the security device of the personal computer-mounted encryption device of the present invention made as described above, the data encryption logic section 12, the encryption information storage memory 14, the rechargeable battery 20, and a plurality of on the substrate 10 After the case sensing pushbutton switches 30a to 30d and the cover sensing pushbutton switches 40 are installed, each of the switches 30a to 30d is pressed into the ON state while being charged in the protective case 4 to be completed. do. Then, the sliding board 60 is positioned so that the cover detection pushbutton switch 40 of the encryption device can be pressed on the inner surface of the computer cover 2 to maintain the ON state. After attaching to the back panel bracket (2a) of the computer main body, while covering the cover 2 while pressing the cover detection pushbutton switch (40). In this case, all the switches 30a to 30d and 40 are turned on so that driving power is applied from the battery 20 to the memory 14, and encryption-related information is separately provided through the data encryption logic unit 12. It is stored in the memory 14 of the, the memory 14 is continuously supplied with the power of the battery 20 to maintain the encryption-related information stored therein.

In such a case, if an intruder opens the computer cover 2 or damages the encryption device to extract encryption related information, the circuit between the battery 20 and the memory 14 is broken, and the memory 14 immediately. All information stored in the data is deleted, thereby preventing the information from leaking.

Looking at this operation in more detail, first, when the computer body cover 2 is opened, the cover detection pushbutton switch 40 that is in contact with the inner surface of the cover 2 is turned off. The cover sensing pushbutton switch 40 is then connected to the conductor strips 50a, 50b via a sliding board 60, the conductor strips 50a, 50b of which are transferred from the battery 20 to the memory 14. Since it is connected in the middle of the power supply circuit line (PL) connected, the power to the battery 20, which is transferred to the memory 14 by the OFF operation of the cover sensing pushbutton switch 40, is cut off. All information stored in will be deleted. In addition, when the computer cover 2 is reached without reaching the encryption device by opening a hole on one side of the cover 2 or the like, and then detaching the protective case 4 of the encryption device from the main body, Since the cover sensing pushbutton switch 40 is separated from the inner surface of the computer cover 2, the information stored in the memory 14 is erased through the same process as described above, thereby preventing the leakage of the information.

On the other hand, if somehow reached to the encryption device without touching the cover detection pushbutton switch 40, when the protective case (4) of the encryption device is first opened, the protective case (4) in several places on the substrate (10) One or more of the case sensing pushbutton switches 30a to 30d that are in an ON state while being in contact with the inner surface of the switch are turned off according to the detachment of the protective case 4, and thus the power signal line PL Is blocked, the power supply to the memory 14 is cut off and the stored information is erased.

In addition, when the protection case 4 of the encryption device is to be cut from one side, the case sensing pushbutton switches 30a to 30d are provided at least at four corners of the substrate 10 so that they are the outermost part of the substrate 10. Since it is connected in a closed curve to the power circuit line (PL) extending to the power supply line, the power supply circuit line (PL) is also cut when cut to the substrate 10, the power supply to the memory 14 is cut off, accordingly The encryption related information stored in (14) is deleted.

If the protection case 4 is cut out by successively or repeatedly drilling holes with a drill or the like, in the encryption device security device according to the present invention, a plurality of power test points 80 connected to the battery 20 on the substrate 10 may be used. ) And the ground test point 82 are located close to each other, so that when the powder generated when drilling holes is sprayed onto the substrate and comes into contact with the test points 80 and 82, the test point 80 and the test point 82 The short-circuit (short), and the current of the battery 20 flows through the closed loop short-circuited so that the stored information is erased by the power supply is cut off to the memory (14).

As described above, the security device of a personal computer-mounted encryption device according to the present invention, if the computer cover or the protection case of the encryption device is invaded for the purpose of stealing the information, it is easily detected without mechanical power consumption by a mechanical principle. The power supply to the memory side is cut off so that the stored information is automatically erased, thereby preventing the leakage of important information, thereby increasing the security of the encryption device.

Claims (5)

The data encryption logic section 12 and the encryption-related information storage memory 14 are provided on the substrate 10 so that a portion other than where the edge connector 6 protrudes is built in the protective case 4. In the encryption apparatus for personal computer deployment, A rechargeable battery 20 for supplying power for preserving data of the encryption-related information storage memory 14 is provided on the substrate 10, and the encryption logic unit 12 and the memory 14 are stored in the memory 14. At any point on the upper surface of the (10), at least one contact with the lateral inner surface or the upper inner surface of the protective case 4 while the corresponding protective case (4) portion is kept in a packaged state (ON) is operated When the corresponding protective case 4 is separated, a plurality of case sensing pushbutton switches 30a to 30d are turned off, and the battery 20 and a plurality of case sensing pushbutton switches 30a to off are operated. Security of a personal computer-mounted encryption device, characterized in that it is configured by connecting a case-sensing pushbutton switch connected to the memory 14 to the memory 14 while the 30d) is sequentially connected to the power circuit line PL. Value. The method according to claim 1, The case sensing pushbutton switches 30a to 30d are installed at least at positions adjacent to the four corners of the substrate 10, and the case sensing pushbutton switches adjacent to each other in the form of a closed curve surrounding the outermost portion of the substrate 10 are connected to a power supply circuit. When the encryption device is cut from the outside at a portion where the power circuit line PL passes, at least three sides of the substrate 10 are closed by the power supply line PL so as to be sequentially connected with the line PL. A security device for an encryption apparatus for mounting a personal computer, characterized in that the power supply circuit line (PL) is cut off. The method according to claim 1, As a means for disconnecting the power supply from the battery 20 to the memory 14 when the computer body cover 2 is detached, a hole 4a is formed in the encryption device protective case 4 so as to prevent it. In the hole 4a, a cover sensing pushbutton switch 40 which is turned off when the cover 2 is detached while contacting the inner surface of the cover 2 is installed, and the cover sensing pushbutton switch 40 thereof. ) Is connected from the one of the case sensing pushbutton switches 30a to 30d to the memory 14 from a power circuit line PL connecting the other case sensing pushbutton switch, or from the last case sensing pushbutton switch. A security field of a personal computer-mounted encryption device characterized in that it is configured to be connected to one of the power supply circuit line (PL) by the cover sensing pushbutton switch 40 to interrupt the power supply circuit line (PL). . The method according to claim 3, Two conductor strips 50a and 50b are disposed on one side of the substrate 10 in a state of being spaced apart from each other, and both sides of the power circuit line PL to be connected to the cover sensing pushbutton switch 40 are respectively connected to the conductors. The upper surface of the conductor strips 50a and 50b thereof is connected to the strips 50a and 50b, and the sliding board is fixed to the substrate 10 through the screw means 70 at any point along its longitudinal direction. And a cover detecting pushbutton switch 40 attached to the sliding board 60 thereof to connect to the conductor strips 50a and 50b. Security device. The method according to claim 1, A plurality of power supply (+) test points 80 and ground (-) test points 82 connected to the battery 20 are disposed on the substrate 10 in close proximity to each other, so that the conductors are connected to the test points 80 and 82. And a short circuit when a contact occurs.