Time-sharing independent rapid key destruction control device for multi-channel data storage system

Abstract

The present invention relates to the field of data security, and in particular to a time-sharing independent rapid key destruction control device for a multi-channel data storage system that improves key destruction efficiency. The device comprises a power input circuit, a key destruction output switch circuit, and a storage circuit. The power conversion circuit is connected to the key destruction output switch circuit via a timing control circuit; a cross energy storage circuit is provided between the power input circuit and the key destruction output switch circuit. In the time-sharing independent rapid key destruction control device for a multi-channel data storage system of the present invention, the power input circuit realizes switching control of the key destruction power supply and the working power supply; the key destruction output switch circuit realizes the working power supply path of each FLASH storage device in the storage circuit in the working state, and in the key destruction state, the key destruction energy of the cross energy storage circuit is sequentially injected into each FLASH storage device; the cross energy storage circuit completes the energy storage for the key destruction of the next round of FLASH storage devices during the key destruction of the previous round of FLASH storage devices, which greatly saves the key destruction time and improves the key destruction efficiency compared with the existing technology.

Description

Technical Field

[0001] The present invention relates to the field of data security, and in particular to a time-sharing independent rapid key destruction control device for a multi-channel data storage system with improved key destruction efficiency. Background Art

[0002] With the development of modern information technology, more and more data needs to be stored and recorded. Single storage devices are no longer sufficient to meet these demands, and in most cases, multi-storage systems are used. In certain situations, to prevent the leakage of critical sensitive data in data storage systems, it is necessary to self-destruct the storage devices carrying critical sensitive information. However, multi-storage systems also pose challenges to implementing this key destruction mechanism.

[0003] Currently, the main methods of key destruction are divided into two categories: soft key destruction and hard key destruction. Soft key destruction destroys the key by erasing the key information in the storage device through a program. Due to the large storage capacity and the inherent data writing characteristics of the storage medium, the soft key destruction method often takes a long time and there is a risk that the erased data may still be recovered. Hard key destruction connects the key destruction power supply to the storage medium through a control circuit, using the high voltage and high current of the key destruction power supply to destroy the physical structure inside the storage medium. For multi-target key destruction scenarios, it mainly uses independent time-sharing key destruction to make the key destruction effect more reliable and more thorough. However, as the capacity of the storage system increases, the number of targets that need to be destroyed also increases, resulting in the entire key destruction process taking longer and longer to complete. It cannot meet the requirement of completing the key destruction operation in a specific and extremely short time at a critical moment.

[0004] Invention patent CN104123513A discloses an onboard high-speed, high-capacity data storage system with a self-destruct function. The system comprises a CPU controller, a NandFLASH storage array, and a key destruction module. The key destruction module uses an energy storage module to amplify external key destruction energy and then releases this energy in the form of high-voltage pulses to the NandFLASH ground pins, achieving the key destruction function. Summary of the Invention

[0005] In view of the defects in the prior art, the present invention provides a time-sharing independent and rapid key destruction control device for a multi-channel data storage system, which improves the key destruction efficiency.

[0006] The technical solution adopted by the present invention is: a time-sharing independent rapid key destruction control device for a multi-channel data storage system, comprising a power input circuit, a key destruction output switch circuit, and a storage circuit connected in sequence, wherein a power conversion circuit is connected in parallel between the power input circuit and the key destruction output switch circuit, wherein the output end of the power conversion circuit is respectively connected to a timing control circuit and a key destruction output switch circuit, wherein the output end of the timing control circuit is connected to the key destruction output switch circuit; and a cross energy storage circuit is provided between the power input circuit and the key destruction output switch circuit.

[0007] The power input circuit realizes the switching control of the storage circuit power supply between the key-destroying power supply and the working power supply;

[0008] The key-destroying output switch circuit realizes the working power supply path of each FLASH memory device in the storage circuit in the working state and sequentially injects the key-destroying energy of the cross-tank circuit into each FLASH memory device in the key-destroying state;

[0009] The storage circuit includes one or more FLASH storage devices that need to destroy the key in the system;

[0010] The power conversion circuit provides power to the timing control circuit and the key-destroying output switch circuit;

[0011] The timing control circuit completes the control of various timings in each circuit through the processor;

[0012] The cross energy storage circuit completes the energy storage for the next round of FLASH memory device key destruction during the previous round of FLASH memory device key destruction through the ping-pong operation of energy storage.

[0013] To better implement the present invention, the cross energy storage circuit includes a first energy storage capacitor I and a second energy storage capacitor II, and also includes a first branch and a second branch. The first energy storage capacitor I is arranged between the first branch and the negative pole of the power input circuit, and the second energy storage capacitor II is arranged between the second branch and the negative pole of the power input circuit; the positive pole of the power input circuit and the key-destroying output switch circuit are both coordinated with the first branch and the second branch through a single-pole double-throw switch.

[0014] To better implement the present invention, the key-destroying output switch circuit includes a positive power switch connected to the positive pole of the power input circuit, and a negative power switch connected to the negative pole of the power input circuit.

[0015] To better implement the present invention, the power input circuit includes a positive power branch and a negative power branch. The positive power branch is connected to the positive power supply and the positive working voltage through a single-pole double-throw switch, and the negative power branch is connected to the negative power supply and the negative working voltage through a single-pole double-throw switch.

[0016] In order to better implement the present invention, a switching coil is provided between the positive electrode of the key-destroying power supply and the negative electrode of the key-destroying power supply, and a corresponding single-pole single-throw switch is provided.

[0017] In order to better implement the present invention, a key-destroying power supply detection circuit is provided between the positive electrode of the key-destroying power supply and the key-destroying output switch circuit.

[0018] In order to better implement the present invention, the key destruction output switch circuit is equipped with a key destruction result detection circuit.

[0019] To better implement the present invention, the voltage of the key-destroying power supply is 18V to 36V.

[0020] In order to better implement the present invention, the voltage of the key-destroying power supply is 28V.

[0021] In order to better implement the present invention, the timing control circuit adopts the GD32C103TBU6 single chip microcomputer.

[0022] The beneficial effects of the present invention are embodied in that: the multi-channel data storage system time-sharing independent rapid key destruction control device of the present invention realizes the switching control of the key destruction power supply and the working power supply through the cooperation of the power input circuit, the key destruction output switch circuit, the storage circuit, the power conversion circuit, the timing control circuit and the cross energy storage circuit lamp. The power input circuit realizes the switching control of the key destruction power supply and the working power supply; the key destruction output switch circuit realizes the working power supply path of each FLASH storage device in the storage circuit in the working state and the key destruction energy of the cross energy storage circuit is sequentially injected into each FLASH storage device in the key destruction state; the storage circuit includes one or more FLASH storage devices; the power conversion circuit supplies power to the timing control circuit; the timing control circuit completes the control of various timings in each circuit through the processor; the cross energy storage circuit, through the ping-pong operation of energy storage, completes the energy storage for the next round of FLASH storage device key destruction during the key destruction period of the previous round of FLASH storage devices, which greatly saves the key destruction time and improves the key destruction efficiency compared with the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0024] Figure 1 This is a structural block diagram of the time-sharing independent rapid key destruction control device for a multi-channel data storage system of the present invention. DETAILED DESCRIPTION

[0025] The following embodiments of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0026] It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0027] Example 1:

[0028] like Figure 1 As shown, the time-sharing independent rapid key destruction control device for a multi-channel data storage system of the present invention includes a power input circuit, a key destruction output switch circuit, and a storage circuit connected in sequence. A power conversion circuit is further connected in parallel between the power input circuit and the key destruction output switch circuit. The output end of the power conversion circuit is respectively connected to a timing control circuit and a key destruction output switch circuit, and the output end of the timing control circuit is connected to the key destruction output switch circuit. A cross energy storage circuit is provided between the power input circuit and the key destruction output switch circuit.

[0029] The power input circuit realizes the switching control of the storage circuit power supply between the key-destroying power supply and the working power supply;

[0030] The key-destroying output switch circuit realizes the working power supply path of each FLASH memory device in the storage circuit in the working state and sequentially injects the key-destroying energy of the cross-tank circuit into each FLASH memory device in the key-destroying state;

[0031] The storage circuit includes one or more FLASH storage devices that need to destroy the key in the system;

[0032] The power conversion circuit provides power to the timing control circuit and the key-destroying output switch circuit;

[0033] The timing control circuit completes the control of various timings in each circuit through the processor;

[0034] The cross-energy storage circuit, through a ping-pong operation of energy storage, completes energy storage for the next round of FLASH memory device key destruction during the previous round of FLASH memory device key destruction. The multi-channel data storage system time-sharing independent rapid key destruction control device of the present invention cooperates with a power input circuit, a key destruction output switch circuit, a storage circuit, a power conversion circuit, a timing control circuit, and a cross-energy storage circuit lamp. The power input circuit realizes switching control of the key destruction power supply and the working power supply; the key destruction output switch circuit realizes the working power supply path of each FLASH memory device in the storage circuit in the working state and sequentially injects the key destruction energy of the cross-energy storage circuit into each FLASH memory device in the key destruction state; the storage circuit includes one or more FLASH memory devices; the power conversion circuit supplies power to the timing control circuit; the timing control circuit completes various timing control in each circuit through a processor; the cross-energy storage circuit, through a ping-pong operation of energy storage, completes energy storage for the next round of FLASH memory device key destruction during the previous round of FLASH memory device key destruction, greatly saving key destruction time and improving key destruction efficiency compared to the existing technology.

[0035] Example 2:

[0036] On the basis of the above embodiment, in order to further better implement the present invention, the cross energy storage circuit includes a first energy storage capacitor I and a second energy storage capacitor II, and also includes a first branch and a second branch. The first energy storage capacitor I is set between the first branch and the negative pole of the power input circuit, and the second energy storage capacitor II is set between the second branch and the negative pole of the power input circuit; the positive pole of the power input circuit and the key destruction output switch circuit are both coordinated with the first branch and the second branch through a single-pole double-throw switch. The first energy storage capacitor I is charged and then released to the FLASH memory device. During this period, the second energy storage capacitor II completes the energy storage for the next round of FLASH memory device key destruction. This cycle is repeated, which greatly saves the key destruction time and improves the key destruction efficiency.

[0037] Preferably, the key-destroying output switch circuit includes a positive power switch connected to the positive pole of the power input circuit, and a negative power switch connected to the negative pole of the power input circuit.

[0038] Example 3:

[0039] On the basis of the above embodiments, in order to further better implement the present invention, the power input circuit includes a positive power branch and a negative power branch. The positive power branch is connected to the positive power supply and the positive working voltage through a single-pole double-throw switch, and the negative power branch is connected to the negative power supply and the negative working voltage through a single-pole double-throw switch.

[0040] Preferably, a switching coil is provided between the positive pole of the key-destroying power supply and the negative pole of the key-destroying power supply, and a corresponding single-pole single-throw switch is provided. When the voltage reaches the voltage range of the key-destroying power supply, the switching coil switches to the key-destroying power supply circuit.

[0041] Preferably, a key-destroying power supply detection circuit is provided between the positive electrode of the key-destroying power supply and the key-destroying output switch circuit. The circuit generates a self-locking signal for the key-destroying output switch circuit, which automatically turns on the switches in the key-destroying output switch circuit in the working state. In the key-destroying state, once the key-destroying power supply is connected, the switches in the key-destroying output switch circuit are immediately turned off, thereby preventing the key-destroying power supply from directly flowing into the FLASH device.

[0042] Preferably, the key destruction output switch circuit is equipped with a key destruction result detection circuit to detect the electrical impedance of each FLASH device after the key is destroyed. If it is detected that the impedance of a certain FLASH device has not reached the burnt state, the key destruction operation is performed again on the FLASH device.

[0043] Preferably, the voltage of the key-destroying power supply is 18V to 36V. Further preferably, the voltage of the key-destroying power supply is 28V.

[0044] Preferably, the timing control circuit adopts a GD32C103TBU6 single chip microcomputer.

[0045] As a preferred embodiment, when there is no key-destroying power supply, the power conversion circuit and the timing control circuit do not work, the switching switch in the power input circuit is disconnected, the power input circuit is connected to the positive pole and the negative pole of the working power supply, the cross energy storage circuit contact a and contact c are turned on, the key-destroying power supply detection circuit outputs a self-locking signal of the switch circuit to turn on the positive pole switch and the negative pole switch of each power supply in the key-destroying switch output circuit, and each FLASH chip in the storage circuit is connected to the positive pole and the negative pole of the working power supply.

[0046] When there is a key-destroying power supply, the key-destroying power supply detection circuit outputs a self-locking signal for the key-destroying switch output circuit, causing both the positive power supply switch and the negative power supply switch in the key-destroying switch output circuit to be disconnected. The power conversion circuit operates to turn on and off the switch in the power input circuit. The power input circuit is connected to the positive and negative poles of the key-destroying power supply, and the cross energy storage circuit completes the key-destroying energy storage. The positive power supply switches and negative power supply switches of each channel in the key-destroying switch output circuit are independently turned on in sequence, completing the key-destroying of each FLASH in the storage circuit one by one.

[0047] The specific working process of the cross-tank circuit is as follows:

[0048] First round: contact a of the single-pole double-throw switch at the front end of the cross energy storage circuit is turned on, contact c of the single-pole double-throw switch at the back end is turned on, and the energy storage capacitor I is charged. After it is fully charged, the single-pole double-throw switch at the front end is switched to contact b, and the energy storage capacitor II starts to charge. At the same time, the positive and negative power supply switches of the first channel of the key destruction output switch circuit are turned on, and the high-voltage power stored in the energy storage capacitor I is injected into the first channel of the FLASH chip in the storage circuit, completing the destruction of the key of the first channel of the FLASH chip. The positive and negative power supply switches of the first channel of the key destruction output switch circuit are disconnected, and the single-pole double-throw switch at the back end of the cross energy storage circuit is switched to contact d.

[0049] Second round: During the key destruction of the first FLASH chip, the energy storage capacitor II completes charging, the single-pole double-throw switch at the front end of the cross energy storage circuit is switched to contact a, and the energy storage capacitor I starts charging. At the same time, the positive and negative power supply switches of the second channel of the key destruction output switch circuit are turned on, and the high-voltage power stored in the energy storage capacitor II is injected into the second channel of the FLASH chip in the storage circuit, completing the key destruction of the second channel of the FLASH chip. The positive and negative power supply switches of the second channel of the key destruction output switch circuit are disconnected, and the single-pole double-throw switch at the back end of the cross energy storage circuit is switched to contact c.

[0050] Round 3: The cross-tank circuit returns to the state of the first round, and the first round of actions is repeated. The third power supply positive and negative switches of the key-destroying output switch circuit are turned on and off, completing the key destruction of the third FLASH chip.

[0051] Round 4: The cross-tank circuit returns to the state of the second round, and the second round of actions is repeated. The fourth power supply positive and negative switches of the key-destroying output switch circuit are turned on and off, completing the key destruction of the fourth FLASH chip.

[0052] Repeat the above steps to complete the destruction of the key of each FLASH in the storage circuit one by one;

[0053] After all FLASHes are burned, the key destruction result detection circuit detects the electrical impedance of each FLASH device after the key is destroyed one by one. If it is detected that the impedance of a certain FLASH has not reached the burned state, the key destruction operation is performed again on the FLASH device.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A time-sharing independent rapid key destruction control device for a multi-channel data storage system, characterized by: The device comprises a power input circuit, a key-destroying output switch circuit, and a storage circuit connected in sequence. A power conversion circuit is further connected in parallel between the power input circuit and the key-destroying output switch circuit. The output end of the power conversion circuit is respectively connected to a timing control circuit and a key-destroying output switch circuit. The output end of the timing control circuit is connected to the key-destroying output switch circuit. A cross energy storage circuit is provided between the power input circuit and the key-destroying output switch circuit. The power input circuit realizes the switching control of the storage circuit power supply between the key-destroying power supply and the working power supply; The key-destroying output switch circuit; Implementing a working power supply path for each FLASH memory device in the storage circuit in the working state and sequentially injecting the key-destroying energy of the cross-tank circuit into each FLASH memory device in the key-destroying state; The storage circuit includes one or more FLASH storage devices that need to destroy the key in the system; The power conversion circuit provides power to the timing control circuit and the key-destroying output switch circuit; The timing control circuit completes the control of various timings in each circuit through the processor; The cross energy storage circuit completes the energy storage for the next round of FLASH memory device key destruction during the previous round of FLASH memory device key destruction through the ping-pong operation of energy storage; The cross energy storage circuit includes a first energy storage capacitor I and a second energy storage capacitor II, and also includes a first branch and a second branch. The first energy storage capacitor I is set between the first branch and the negative pole of the power input circuit, and the second energy storage capacitor II is set between the second branch and the negative pole of the power input circuit; the positive pole of the power input circuit and the key destruction output switch circuit are both coordinated with the first branch and the second branch through a single-pole double-throw switch; the first energy storage capacitor I is charged and then released to the FLASH storage device. During this period, the second energy storage capacitor II completes the energy storage for the next round of FLASH storage device key destruction.

2. The time-sharing independent rapid key destruction control device for a multi-channel data storage system according to claim 1, characterized in that: The key-destroying output switch circuit includes a positive power switch connected to the positive pole of the power input circuit, and a negative power switch connected to the negative pole of the power input circuit.

3. The time-sharing independent rapid key destruction control device for a multi-channel data storage system according to claim 1, characterized in that: The power input circuit includes a positive power branch and a negative power branch. The positive power branch is connected to the positive power supply and the positive working voltage through a single-pole double-throw switch, and the negative power branch is connected to the negative power supply and the negative working voltage through a single-pole double-throw switch.

4. The time-sharing independent rapid key destruction control device for a multi-channel data storage system according to claim 3, characterized in that: A switching coil is provided between the positive electrode of the key-destroying power supply and the negative electrode of the key-destroying power supply, and a corresponding single-pole single-throw switch is provided.

5. The time-sharing independent rapid key destruction control device for a multi-channel data storage system according to claim 4, characterized in that: A key-destroying power supply detection circuit is provided between the positive electrode of the key-destroying power supply and the key-destroying output switch circuit; a self-locking signal of the key-destroying output switch circuit is generated, and the switches of the key-destroying output switch circuit are naturally turned on in the working state. In the key-destroying state, once the key-destroying power supply is connected, the switches of the key-destroying output switch circuit are immediately turned off to prevent the key-destroying power supply from directly flowing into the FLASH device.

6. The time-sharing independent rapid key destruction control device for a multi-channel data storage system according to claim 5, characterized in that: The key destruction output switch circuit is equipped with a key destruction result detection circuit to detect the electrical impedance of each FLASH device after the key is destroyed. If it is detected that the impedance of a certain FLASH device has not reached the burned state, the key destruction operation is performed again on the FLASH device.

7. The time-sharing independent rapid key destruction control device for a multi-channel data storage system according to claim 6, characterized in that: The voltage of the key-destroying power supply is 18V to 36V.

8. The time-sharing independent rapid key destruction control device for a multi-channel data storage system according to claim 7, characterized in that: When there is a key-destroying power supply, the key-destroying power supply detection circuit outputs a self-locking signal for the key-destroying output switch circuit, causing the positive power switch and the negative power switch in the key-destroying output switch circuit to be disconnected. The power conversion circuit operates to turn on and off the switching switch in the power input circuit. The power input circuit is connected to the positive and negative poles of the key-destroying power supply, and the cross energy storage circuit completes the key-destroying energy storage. The positive power switches and negative power switches of each channel in the key-destroying output switch circuit are turned on independently in sequence, completing the key destruction of each FLASH in the storage circuit one by one.

9. The time-sharing independent rapid key destruction control device for a multi-channel data storage system according to claim 8, characterized in that: When there is no key-destroying power supply, the power conversion circuit and the timing control circuit do not work, the switching switch in the power input circuit is disconnected, the power input circuit is connected to the positive pole and the negative pole of the working power supply, the cross energy storage circuit contact a and contact c are turned on, the key-destroying power supply detection circuit outputs a self-locking signal of the key-destroying output switch circuit to turn on the positive pole switch and the negative pole switch of each power supply in the key-destroying output switch circuit, and each FLASH chip in the storage circuit is connected to the positive pole and negative pole of the working power supply.

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