Cover opening detection system and method

Abstract

The invention discloses a cover opening detection system and method.The system comprises an air pressure sensor, a power source, a single-chip microcomputer and a memorizer, the single-chip microcomputer is electrically connected with the air pressure sensor, the power source and the memorizer, and the air pressure sensor, the power source, the single-chip microcomputer and the memorizer are arranged on a sealed metal shell; the metal shell is used for sealing and storing target equipment; the memory is used for storing the initial air pressure when the sealed target equipment leaves the factory; the power supply is used for supplying power to the air pressure sensor and the single-chip microcomputer so as to ensure that the air pressure sensor and the single-chip microcomputer keep running; the single-chip microcomputer is used for controlling the air pressure sensor to periodically collect air pressure data in the sealed space where the target equipment is located, and conducting uncovering monitoring on the target equipment according to the collected real-time air pressure and the initial air pressure. Through the technical scheme, the safe operation of the target equipment and the safety of the data stored in the target equipment are improved.

Description

Technical Field

[0001] The present invention relates to the field of information security technology, and in particular to a cover opening detection system and method. Background Art

[0002] Cover opening monitoring is mostly used in encryption devices. In order to prevent the theft of important data by directly analyzing circuits and signals after disassembling the equipment, the cover opening monitoring on the market currently mostly adopts lock-free buttons, photoelectric switches, flexible wiring and other methods. The principle is that when the cover is opened, the state of the mechanical button will change, the light will change, or the flexible circuit will be cut off to achieve the purpose of monitoring.

[0003] However, currently, the commonly used methods for monitoring the opening of the cover basically have corresponding countermeasures. Therefore, a new method for monitoring the opening of the cover is urgently needed. Summary of the invention

[0004] The invention provides a cover opening detection system and method to improve the protection level of cover opening monitoring.

[0005] According to one aspect of the present invention, a cover opening monitoring system is provided, the system comprising: an air pressure sensor, a power supply, a single chip microcomputer and a memory, the single chip microcomputer is electrically connected to the air pressure sensor, the power supply and the memory respectively, and the air pressure sensor, the power supply, the single chip microcomputer and the memory are arranged in a sealed metal housing;

[0006] The metal housing is used to seal and store the target device; wherein the target device is a device carrying confidential data;

[0007] The memory is used to store the initial air pressure of the sealed target device when it leaves the factory; wherein the initial air pressure is encrypted by a national encryption algorithm and stored in the memory, and different target devices have different initial air pressures corresponding to the target devices;

[0008] The power supply is used to supply power to the air pressure sensor and the single-chip microcomputer to ensure that the air pressure sensor and the single-chip microcomputer keep running;

[0009] The single chip microcomputer is used to control the air pressure sensor to periodically collect air pressure data in the sealed space where the target device is located, and monitor the target device for opening the cover based on the collected real-time air pressure and initial air pressure; wherein the sealed space is a space formed by a metal shell for placing the target device.

[0010] According to another aspect of the present invention, a cover opening monitoring method is provided, which is performed by a cover opening monitoring system, the system comprising an air pressure sensor, a power supply, a single chip microcomputer and a memory, the single chip microcomputer is electrically connected to the air pressure sensor, the power supply and the memory respectively, and the air pressure sensor, the power supply, the single chip microcomputer and the memory are arranged in a sealed metal housing; the method comprises:

[0011] The target device is sealed and stored in a metal casing; wherein the target device is a device carrying confidential data;

[0012] The initial air pressure of the sealed target device when it leaves the factory is stored in the memory; wherein the initial air pressure is encrypted by a national encryption algorithm and stored in the memory, and different target devices have different initial air pressures corresponding to the target devices;

[0013] The air pressure sensor and the single-chip microcomputer are powered by a power supply to ensure that the air pressure sensor and the single-chip microcomputer remain operational;

[0014] The pressure sensor is controlled by a single chip microcomputer to periodically collect the pressure data in the sealed space where the target device is located, and the target device is monitored for opening the cover based on the collected real-time air pressure and initial air pressure; wherein the sealed space is the space formed by the metal shell for placing the target device.

[0015] The technical solution of the embodiment of the present invention monitors the air pressure of the sealed space where the target device is located by opening the cover. No matter what method the intruder uses to damage the metal shell, the airtightness of the target device will fail, thereby increasing the air pressure in the sealed space and triggering the anti-dismantling monitoring function. Even if the intruder knows that the cover opening monitoring of the target device is a protection method using air pressure, it is not possible to disassemble the device in a vacuum state, because the initial air pressure of different target devices is inconsistent, and the intruder cannot know what the initial air pressure of the target device is. As long as the change in air pressure exceeds a certain threshold, an alarm will be triggered. The safe operation of the target device and the security of the data stored in the target device are improved.

[0016] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1a is a structural schematic diagram of a cover opening monitoring system provided according to Embodiment 1 of the present invention;

[0019] Figure 1b is a schematic structural diagram of a metal casing provided according to Embodiment 1 of the present invention;

[0020] Figure 2 It is a method flow chart of a cover opening monitoring method provided according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0023] Embodiment 1

[0024] Figure 1a A schematic diagram of the structure of a cover opening monitoring system is provided for the first embodiment of the present invention. This embodiment is applicable to the case of performing cover opening detection on a physical device. Figure 1a As shown, the cover opening monitoring system includes an air pressure sensor 101, a power supply 102, a single chip 103 and a memory 104, and the single chip 103 is electrically connected to the air pressure sensor 101, the power supply 102 and the memory 103. It should be noted that the cover opening monitoring system can be arranged in a sealed metal housing.

[0025] The metal casing can be used to seal and store the target device, where the target device is a device carrying confidential data. The metal casing has very good airtightness and an IP68 protection level, which can cope with various complex working environments. After the target device leaves the factory, the internal air pressure of the device is always in a relatively stable state.

[0026] Optionally, in the embodiment of the present invention, the metal housing may be made of aluminum alloy, such as Figure 1bAs shown, all external interfaces of the metal housing use waterproof connectors with an IP68 protection grade. There is a waterproof rubber ring between the upper cover and the main shell of the metal housing and waterproof glue is applied. The upper cover and the main shell are connected by screws of preset specifications, and screw locking glue is applied so that the shell cannot be opened without special tools after leaving the factory. An exhaust hole is provided in the upper cover; before the target device leaves the factory, the internal gas in the sealed space where the target device is located is extracted through the exhaust hole, and when the pressure in the sealed space reaches a preset sealing pressure threshold, the exhaust hole is sealed. Optionally, the preset specification screws and the preset sealing pressure threshold can be adaptively set according to technical personnel in this field.

[0027] The memory is used to store the initial air pressure of the sealed target device when it leaves the factory; wherein the initial air pressure is encrypted by the national encryption algorithm and stored in the memory, and the initial air pressure corresponding to different target devices is also different. It should be noted that the memory can be a storage chip.

[0028] The single chip microcomputer can be used to control the air pressure sensor to periodically collect the air pressure data in the sealed space where the target device is located, and monitor the target device for opening the cover based on the collected real-time air pressure and initial air pressure; wherein the sealed space can be a space formed by a metal shell for placing the target device.

[0029] Optionally, in an embodiment of the present invention, when the target device is first run, the single-chip microcomputer can decrypt the initial air pressure stored in the memory according to the national secret algorithm, and store the decrypted initial air pressure in its own memory; control the air pressure sensor to periodically collect real-time air pressure data in the sealed space where the target device is located; determine whether the difference between the initial air pressure and the real-time air pressure data is within the trustworthy threshold, and if not, trigger the anti-disassembly monitoring function. If so, enter the low power consumption mode. Optionally, the trustworthy threshold can be adaptively set according to those skilled in the art.

[0030] It should be noted that the memory can also be used to store the device security data of the target device; when the target device is in the anti-tampering monitoring function, the single-chip microcomputer is also used to clear the device security data stored in the memory to ensure that the device security data stored in the target device is not leaked. It should be noted that the air pressure sensor can be a miniature digital sensor directly welded on the single-chip microcomputer.

[0031] The power supply can be used to power the air pressure sensor and the single-chip microcomputer to ensure that the air pressure sensor and the single-chip microcomputer keep running.

[0032] Optionally, in an embodiment of the present invention, when the target device is in a shutdown state, the single chip will enter a low power consumption mode. In the low power consumption mode, the single chip will be powered by a built-in power supply; according to the acquisition cycle of the air pressure sensor, the air pressure sensor is periodically controlled to collect real-time air pressure data in the sealed space where the target device is located. It should be noted that when the target device is running and the target device is in an anti-disassembly monitoring function, the power supply can be used to power the memory to ensure that the memory can perform data interaction normally. Optionally, the acquisition cycle of the air pressure sensor for air pressure acquisition can be adaptively set according to those skilled in the art. It should be noted that the power of the built-in power supply in the metal casing is determined according to the expected working time of the target device.

[0033] In a specific implementation, by reasonably setting the acquisition cycle of the air pressure sensor, the intruder cannot complete the operation of invading the target device during the acquisition cycle. When the target device is in the shutdown state, the single chip will enter the low power mode, at which time the single chip will consume the power of the power supply built in the metal shell; in the low power mode, the single chip can periodically control the air pressure sensor to collect air pressure through the timed wake-up function. Since the operation time of collecting air pressure is very short, the endurance of the power supply can meet the application requirements of the target device; when it is not in the acquisition cycle, the power supply of the air pressure sensor will be cut off, and the power supply does not need to supply power to the single chip and the air pressure sensor, and the power supply will not be consumed, so as to ensure that the power supply can meet the working life requirements of the target device. It should be noted that after the target device is turned on, it only needs to read the initial air pressure from the memory once, and save it in the memory in the single chip chip, without repeated reading. Therefore, the memory does not need to be powered on outside the acquisition cycle to save power.

[0034] The safety of the device is ensured when the target device is powered off. The built-in power supply of the metal casing ensures that the microcontroller collects air pressure. When the anti-dismantling monitoring function is triggered, the microcontroller can directly clear the security data.

[0035] The technical solution of the embodiment of the present invention monitors the air pressure of the sealed space where the target device is located by opening the cover. No matter what method the intruder uses to damage the metal shell, the airtightness of the target device will fail, thereby increasing the air pressure in the sealed space and triggering the anti-dismantling monitoring function. Even if the intruder knows that the cover opening monitoring of the target device is a protection method using air pressure, it is not possible to disassemble the device in a vacuum state, because the initial air pressure of different target devices is inconsistent, and the intruder cannot know what the initial air pressure of the target device is. As long as the change in air pressure exceeds a certain threshold, an alarm will be triggered. The safe operation of the target device and the security of the data stored in the target device are improved.

[0036] Embodiment 2

[0037] Figure 2 Flow chart of a cover opening monitoring method provided in Embodiment 2 of the present invention, the cover opening monitoring method is applied to a cover opening monitoring system including an air pressure sensor, a power supply, a single chip microcomputer and a memory; the single chip microcomputer is electrically connected to the air pressure sensor, the power supply and the memory respectively, and the air pressure sensor, the power supply, the single chip microcomputer and the memory are arranged in a sealed metal housing; Figure 2 As shown, the method includes:

[0038] S210. The target device is sealed and stored in a metal casing; wherein the target device is a device carrying confidential data.

[0039] S220. Storing the initial air pressure of the sealed target device before leaving the factory in a memory; wherein the initial air pressure is encrypted by a national encryption algorithm and stored in the memory, and different target devices have different initial air pressures.

[0040] S230, supplying power to the air pressure sensor and the single-chip microcomputer through a power supply to ensure that the air pressure sensor and the single-chip microcomputer keep running.

[0041] S240, controlling the air pressure sensor through the single chip microcomputer to periodically collect the air pressure data in the sealed space where the target device is located, and monitoring the target device for opening the cover according to the collected real-time air pressure and initial air pressure; wherein the sealed space is the space where the target device is placed in the metal shell.

[0042] Optionally, the microcontroller can be specifically used for:

[0043] When the target device is run for the first time, the initial air pressure stored in the memory is decrypted according to the national encryption algorithm, and the decrypted initial air pressure is stored in its own memory;

[0044] Controlling the air pressure sensor to periodically collect real-time air pressure data in the sealed space where the target device is located;

[0045] Determine whether the difference between the initial air pressure and the real-time air pressure data is within the credible threshold. If not, the anti-tampering monitoring function is triggered.

[0046] Optionally, the memory is also used to store device security data of the target device; when the target device is in an anti-disassembly monitoring function, the single-chip microcomputer is also used to clear the device security data stored in the memory.

[0047] Optionally, the power supply is used to supply power to the memory when the target device is running and the target device is in an anti-tampering monitoring function.

[0048] Optionally, the microcontroller is also specifically used for:

[0049] When the target device is in a shutdown state, it enters a low power consumption mode and is powered by a built-in power supply; according to the collection cycle of the air pressure sensor, the air pressure sensor is periodically controlled to collect real-time air pressure data in the sealed space where the target device is located.

[0050] Optionally, the power level of the power source built into the metal housing is determined according to the expected operating time of the target device.

[0051] Optionally, the external interface of the metal shell adopts a waterproof connector with a preset protection level, waterproof material is applied between the upper cover and the main shell of the metal shell, and fixed with screws of preset specifications, so that the metal shell can only be opened by a fixing tool.

[0052] Optionally, the upper cover of the metal shell is provided with an exhaust hole; before the target device leaves the factory, the internal gas in the sealed space where the target device is located is extracted through the exhaust hole, and when the pressure in the sealed space reaches a preset sealing pressure threshold, the exhaust hole is sealed.

[0053] Optionally, the air pressure sensor adopts a miniature digital sensor and is directly welded on the single-chip microcomputer.

[0054] The technical solution of the embodiment of the present invention monitors the air pressure of the sealed space where the target device is located by opening the cover. No matter what method the intruder uses to damage the metal shell, the airtightness of the target device will fail, thereby increasing the air pressure in the sealed space and triggering the anti-dismantling monitoring function. Even if the intruder knows that the cover opening monitoring of the target device is a protection method using air pressure, it is not possible to disassemble the device in a vacuum state, because the initial air pressure of different target devices is inconsistent, and the intruder cannot know what the initial air pressure of the target device is. As long as the change in air pressure exceeds a certain threshold, an alarm will be triggered. The safe operation of the target device and the security of the data stored in the target device are improved.

[0055] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0056] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cover opening monitoring system, characterized in that: The system includes an air pressure sensor, a power supply, a single chip microcomputer and a memory, wherein the single chip microcomputer is electrically connected to the air pressure sensor, the power supply and the memory respectively, and the air pressure sensor, the power supply, the single chip microcomputer and the memory are arranged in a sealed metal housing; The metal housing is used to seal and store the target device; wherein the target device is a device carrying confidential data; The memory is used to store the initial air pressure of the sealed target device when it leaves the factory; wherein the initial air pressure is encrypted by a national encryption algorithm and stored in the memory, and different target devices have different initial air pressures corresponding to the target devices; The power supply is used to supply power to the air pressure sensor and the single-chip microcomputer to ensure that the air pressure sensor and the single-chip microcomputer keep running; The single chip microcomputer is used to control the air pressure sensor to periodically collect air pressure data in the sealed space where the target device is located, and monitor the target device for opening the cover based on the collected real-time air pressure and initial air pressure; wherein the sealed space is a space formed by a metal shell for placing the target device.

2. The system according to claim 1, characterized in that The single chip microcomputer is specifically used for: When the target device is run for the first time, the initial air pressure stored in the memory is decrypted according to the national encryption algorithm, and the decrypted initial air pressure is stored in its own memory; Controlling the air pressure sensor to periodically collect real-time air pressure data in the sealed space where the target device is located; Determine whether the difference between the initial air pressure and the real-time air pressure data is within the credible threshold. If not, the anti-tampering monitoring function is triggered.

3. The system according to claim 1, characterized in that The memory is also used to store device security data of the target device; when the target device is in the anti-disassembly monitoring function, the single-chip microcomputer is also used to clear the device security data stored in the memory.

4. The system according to claim 1, characterized in that The power supply is used to supply power to the memory when the target device is running and the target device is in the anti-tampering monitoring function.

5. The system according to claim 1, characterized in that The single chip microcomputer is also specifically used for: When the target device is in a shutdown state, it enters a low power consumption mode and is powered by a built-in power supply; according to the collection cycle of the air pressure sensor, the air pressure sensor is periodically controlled to collect real-time air pressure data in the sealed space where the target device is located.

6. The system according to claim 4, characterized in that The amount of electricity of the power source built into the metal housing is determined according to the expected working time of the target device.

7. The system according to claim 1, characterized in that The external interface of the metal shell adopts a waterproof connector with a preset protection level. Waterproof material is applied between the upper cover and the main shell of the metal shell and fixed with screws of preset specifications so that the metal shell can only be opened by a fixing tool.

8. The system according to claim 7, characterized in that The upper cover of the metal shell is provided with an exhaust hole; before the target device leaves the factory, the internal gas in the sealed space where the target device is located is exhausted through the exhaust hole, and when the pressure in the sealed space reaches a preset sealing pressure threshold, the exhaust hole is sealed.

9. The system according to claim 1, characterized in that The air pressure sensor adopts a miniature digital sensor and is directly welded on the single chip microcomputer.

10. A method for monitoring cover opening, characterized in that: The method is performed by a cover opening monitoring system, the system includes an air pressure sensor, a power supply, a single chip microcomputer and a memory, the single chip microcomputer is electrically connected to the air pressure sensor, the power supply and the memory respectively, and the air pressure sensor, the power supply, the single chip microcomputer and the memory are arranged in a sealed metal housing; the method includes: The target device is sealed and stored in a metal casing; wherein the target device is a device carrying confidential data; The initial air pressure of the sealed target device when it leaves the factory is stored in the memory; wherein the initial air pressure is encrypted by a national encryption algorithm and stored in the memory, and different target devices have different initial air pressures corresponding to the target devices; The air pressure sensor and the single-chip microcomputer are powered by a power supply to ensure that the air pressure sensor and the single-chip microcomputer remain operational; The pressure sensor is controlled by a single chip microcomputer to periodically collect the pressure data in the sealed space where the target device is located, and the target device is monitored for opening the cover based on the collected real-time air pressure and initial air pressure; wherein the sealed space is the space formed by the metal shell for placing the target device.

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