CN113496047A - Electronic password card with anti-disassembly protection - Google Patents
Electronic password card with anti-disassembly protection Download PDFInfo
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- CN113496047A CN113496047A CN202110862371.0A CN202110862371A CN113496047A CN 113496047 A CN113496047 A CN 113496047A CN 202110862371 A CN202110862371 A CN 202110862371A CN 113496047 A CN113496047 A CN 113496047A
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- 238000001514 detection method Methods 0.000 claims abstract description 63
- 230000007246 mechanism Effects 0.000 claims abstract description 39
- 239000002184 metal Substances 0.000 claims description 33
- 238000010586 diagram Methods 0.000 description 12
- 238000005553 drilling Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- FPWNLURCHDRMHC-UHFFFAOYSA-N 4-chlorobiphenyl Chemical compound C1=CC(Cl)=CC=C1C1=CC=CC=C1 FPWNLURCHDRMHC-UHFFFAOYSA-N 0.000 description 3
- 238000004590 computer program Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000006399 behavior Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/71—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information
- G06F21/77—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information in smart cards
Abstract
The application discloses take electron password card of anti-disassembly protection, including the casing, dismantle detection mechanism and electron password card circuit. The electronic password card circuit is arranged on the PCB circuit board, and the PCB circuit board is arranged inside the shell. The disassembly detection mechanism is arranged between the PCB circuit board and the shell and used for sending a second level signal to the electronic password card circuit when the disassembly detection mechanism detects that the shell is disassembled. The electronic password card circuit comprises a disassembly detection circuit, a storage unit circuit, a power supply and a switch circuit, wherein the disassembly detection circuit is used for controlling the switch circuit to disconnect the power supply from the storage unit circuit when receiving a second level signal sent by the disassembly detection mechanism so as to empty the stored electronic password information due to power loss of the storage unit circuit. Because the shell of the electronic password card is detected by the disassembly detection mechanism, when the shell is disassembled, the power supply of the storage unit circuit is disconnected so as to empty the stored electronic password information, and the safety of the electronic password card is improved.
Description
Technical Field
The invention relates to the technical field of password protection, in particular to an electronic password card with anti-disassembly protection.
Background
The issuance of cipher laws regulates the application and management of ciphers, promotes the development of cipher careers, guarantees the network and information security, maintains the national security and social public benefits, and protects the legal rights and interests of citizens, legal people and other organizations. The common people may not feel the influence of the password on our life, but the password is not around us at all times, and each search of each click on the network is encrypted and transmitted on the internet, so that the data of us is prevented from being tampered and stolen by others. Products related to cryptographic applications include cryptographic engines, security gateways, IPSec/SSL and VPN cryptographic devices, and the like. These devices provide services such as data encryption and decryption, signature verification, key exchange, etc. to protect our information, and these applications also apply to finance, aerospace, military, etc. in addition to the protection of personal information. These key services provided by these devices are all from the crypto module, and PCIE-based crypto cards are commonly used for this purpose. At present, most of key information in most of cryptographs is stored in a nonvolatile memory chip in a form of ciphertext, and a root key used for encrypting the key information is also stored in the nonvolatile memory chip. The confidentiality of the key information can be ensured to a certain extent, but if the chip is queried reversely, the root key information is leaked with a certain probability, so that the leakage and the tampering of the confidential information are caused.
Disclosure of Invention
The invention mainly solves the technical problem that the electronic password card is easy to cause the leakage or the tampering of the password key information due to the disassembly.
According to a first aspect, an embodiment provides an electronic password card with anti-detachment protection, which comprises a shell, a detachment detection mechanism and an electronic password card circuit;
the electronic password card circuit is arranged on a PCB circuit board, and the PCB circuit board is arranged inside the shell;
the disassembly detection mechanism is arranged between the PCB and the shell, is connected with the electronic password card circuit and is used for sending a first level signal to the electronic password card circuit; the electronic password card circuit is also used for sending a second level signal to the electronic password card circuit when the shell is detected to be detached;
the electronic password card circuit comprises a disassembly detection circuit, a storage unit circuit, a power supply and a switch circuit;
the power supply is connected with the storage unit circuit through the switch circuit and used for supplying power to the storage unit circuit through the switch circuit;
the storage unit circuit is used for storing electronic password information; the storage unit circuit is also used for clearing the stored electronic password information when the power is lost;
the disassembly detection circuit is connected with the switch circuit and used for sending a switch disconnection electric signal to the switch circuit when receiving a second level signal sent by the disassembly detection mechanism;
the switch circuit is also used for responding to the switch disconnection electric signal to disconnect the power supply and the storage unit circuit so as to empty the stored electronic password information due to power loss of the storage unit circuit.
In one embodiment, the detachment detection mechanism includes a flexible circuit board and at least two metal ejector pins;
the flexible circuit board is tightly attached to the inner surface of the shell, each metal thimble is pressed between the PCB and the flexible circuit board, and the flexible circuit board is electrically connected with the disassembly detection circuit through the pressed metal thimble;
when each metal thimble is electrically connected with the PCB and the flexible circuit board, the flexible circuit board is used for sending the first level signal to the disassembly detection circuit;
when the housing is disassembled and at least one metal thimble is disconnected with the flexible circuit board, the flexible circuit board is further used for sending the second level signal to the disassembly detection circuit.
In one embodiment, the disassembly detection circuit is a logic judgment circuit, and the logic judgment circuit includes a preset level signal input terminal, a logic signal input terminal, and a logic judgment result output terminal; the preset level signal input end is used for inputting a preset third level signal; the logic signal input end is electrically connected with the disassembly detection mechanism and is used for inputting the first level signal or the second level signal; the logic judgment result output end is connected with the switch circuit;
the logic judgment circuit is used for carrying out logic judgment on the third level signal and the first level signal or the second level signal output by the disassembly detection mechanism, and sending a switch disconnection electric signal to the switch circuit through the logic judgment result output end when the second level signal is input to the logic signal input end.
In one embodiment, the flexible circuit board is in a grid shape.
In one embodiment, the flexible circuit board includes a first mesh circuit board and a second mesh circuit board, and the first mesh circuit board and the second mesh circuit board are respectively disposed on an inner surface of an opposite side of the housing.
In an embodiment, the logic signal input terminal includes a first network connection terminal and a second network connection terminal, the first network connection terminal is electrically connected to the first network circuit board through at least one of the metal pins, and the second network connection terminal is electrically connected to the second network circuit board through at least one of the metal pins.
In one embodiment, the logic judgment circuit comprises a first logic circuit, and the first logic circuit comprises a first not gate, a second not gate, a third not gate, a fourth not gate and a first and nor gate;
the input end of the first not gate is used as a preset level signal input end of the logic judgment circuit, and the output end of the first not gate is connected with the first input ends of the first and not gates;
the input end of the second not gate is used as the first network connection end, and the output end of the second not gate is connected with the third input ends of the first and nor gates;
the input end of the third not gate is used as the second network connection end, and the output end of the third not gate is connected with the fourth input end of the first and nor gates;
the input end of the fourth not gate is connected with the output end of the third not gate, and the output end of the fourth not gate is connected with the second input ends of the first and the nor gates;
and the output end of the first AND/OR gate is used as the output end of the logic judgment result of the logic judgment circuit.
In one embodiment, the logic judgment circuit comprises three logic judgment units; the logic judgment unit comprises a first NOT gate, a second NOT gate, a third NOT gate, a fourth NOT gate, a first and NOR gate, a first input end, a second input end, a third input end and a first output end; the input end of the first not gate is used as the first input end of the logic judgment unit, and the output end of the first not gate is connected with the first input ends of the first and nor gates; the input end of the second not gate is used as the second input end of the logic judgment unit, and the output end of the second not gate is connected with the third input ends of the first and nor gates; the input end of the third not gate is used as the third input end of the logic judgment unit, and the output end of the third not gate is connected with the fourth input end of the first and nor gate; the input end of the fourth not gate is connected with the output end of the third not gate, and the output end of the fourth not gate is connected with the second input ends of the first and the nor gates; the output end of the first and NOR gate is used as the first output end of the logic judgment unit;
the three logic judgment units comprise a first logic unit, a second logic unit and a third logic unit; the first input end of the first logic unit is used as a preset level signal input end of the logic judgment circuit, the second input end of the first logic unit is connected with the first output end of the second logic unit, and the third input end of the first logic unit is connected with the first output end of the third logic unit;
the first input end of the second logic unit is used for inputting a preset fourth level signal, and the second input end and the third input end of the second logic unit are electrically connected with the first grid circuit board through at least one metal thimble respectively;
the first input end of the third logic unit is used for inputting the fourth level signal, and the second input end and the third input end of the third logic unit are electrically connected with the second grid circuit board through at least one metal thimble respectively.
In one embodiment, the power supply comprises a rechargeable battery or a button battery.
In one embodiment, the memory cell circuit includes a low power SRAM chip.
According to the electronic password card with the anti-disassembly protection, the disassembly detection mechanism is used for detecting the shell of the electronic password card, and when the shell is detected to be disassembled, the power supply of the storage unit circuit is disconnected so as to empty the stored electronic password information, so that the safety of the electronic password card is improved.
Drawings
FIG. 1 is a diagram illustrating an embodiment of an electronic cryptographic card;
FIG. 2 is a diagram illustrating an exemplary electronic cryptographic card circuit;
FIG. 3 is a diagram illustrating an exemplary electronic cryptographic card;
FIG. 4 is a circuit diagram of a logic decision circuit in one embodiment;
FIG. 5 is a circuit diagram of a logic decision circuit in one embodiment;
FIG. 6 is a diagram illustrating an embodiment of an electronic cryptographic card circuit.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
In the prior art, the key information of the electronic password card is stored in a nonvolatile storage medium in a form of ciphertext, and although the ciphertext is stored, the risk of leakage caused by reverse query is possible. In the embodiment of the application, a disassembly detection mechanism is additionally arranged in the electronic password card and is arranged between the PCB and the shell, and all chip devices are wrapped in the shell. And then the electronic password information is stored in a volatile storage medium, and the electronic password card can detect the behavior of detaching the password card in real time in normal power-on and power-off scenes. When the disassembly happens, the electronic password information containing the key information can be detected by the disassembly detection mechanism and then removed, and the plaintext key cannot be recovered even if the key information is reversed, so that the key information is prevented from being leaked.
The first embodiment is as follows:
referring to fig. 1, a schematic structural diagram of an electronic cryptographic card in an embodiment is shown, where the electronic cryptographic card includes a housing 1, a detachment detection mechanism 2, and an electronic cryptographic card circuit. The electronic password card circuit is arranged on the PCB circuit board 3, and the PCB circuit board 3 is arranged inside the shell 1. The detachment detection mechanism 2 is disposed between the PCB circuit board 3 and the housing 1. The disassembly detection mechanism 2 is electrically connected with the electronic password card circuit and is used for sending a first level signal to the electronic password card circuit and sending a second level signal to the electronic password card circuit when the disassembly of the shell 1 is detected. In one embodiment, the detachment detection mechanism 2 includes a flexible circuit board 21 and at least two metal pins 22. The flexible circuit board 21 is closely attached to the inner surface of the housing 1, each metal thimble 22 is pressed between the PCB 3 and the flexible circuit board 21, the flexible circuit board 21 is electrically connected with the electronic password card circuit through the pressed metal thimble 22, and when each metal thimble 22 is electrically connected with the PCB 3 and the flexible circuit board 21, the flexible circuit board 21 is used for sending a first level signal to the electronic password card circuit. When the housing 1 is detached and the at least one metal thimble 22 is disconnected from the flexible circuit board 21, the flexible circuit board 21 is further configured to send a second level signal to the electronic combination card circuit.
Referring to fig. 2, which is a schematic structural diagram of an electronic cryptographic card circuit in an embodiment, the electronic cryptographic card circuit 4 includes a detachment detection circuit 41, a storage unit circuit 44, a power supply 42, and a switch circuit 43. The power supply 42 is connected to the memory cell circuit 44 through the switch circuit 43, and the power supply 42 supplies power to the memory cell circuit 44 through the switch circuit 43. The memory cell circuit 44 is used to store electronic cryptographic information. The memory cell circuit 44 is also used to clear stored electronic cryptographic information when power is lost. The detachment detection circuit 41 is connected to the switch circuit 43, and is configured to send a switch-off electrical signal to the switch circuit 43 when receiving the second level signal sent by the detachment detection mechanism 2. The switch circuit 43 is also used for disconnecting the power supply 42 and the storage unit circuit 44 in response to the switch disconnection electric signal, so as to empty the storage unit circuit 44 of the stored electronic password information due to power loss.
In one embodiment, the detachment detection circuit 41 is a logic determination circuit, and the logic determination circuit includes a predetermined level signal input terminal, a logic signal input terminal, and a logic determination result output terminal. The preset level signal input end is used for inputting a preset third level signal. The logic signal input end is electrically connected with the disassembly detection mechanism 2 and is used for inputting a first level signal or a second level signal. The logic determination result output terminal is connected to the switching circuit 43. The logic judgment circuit is configured to perform logic judgment on the third level signal and the first level signal or the second level signal output by the detachment detection mechanism 2, and send a switch off electrical signal to the switch circuit 43 through the logic judgment result output end when the second level signal is input to the logic signal input end. In one embodiment, the predetermined third level signal is high.
Referring to fig. 3, a schematic structural diagram of an electronic password card in an embodiment is shown, in which a flexible circuit board of the detachment detection mechanism 2 is in a grid shape in an embodiment. The flexible circuit board 21 includes a first mesh circuit board 211 and a second mesh circuit board 212, and the first mesh circuit board 211 and the second mesh circuit board 212 are respectively disposed on the inner surfaces of the opposite sides of the housing 1. In one embodiment, the logic signal input terminal includes a first network connection terminal and a second network connection terminal, the first network connection terminal is connected to the first grid circuit board 211 through at least one metal thimble 221, and the second network connection terminal is electrically connected to the second grid circuit board 222 through at least one metal thimble 222.
In one embodiment, the power supply includes a rechargeable battery or a button cell. In one embodiment, the memory cell circuit includes a low power SRAM chip.
Referring to fig. 4, a circuit diagram of a logic judgment circuit in an embodiment is shown, the logic judgment circuit includes a first logic circuit 5, and the first logic circuit 5 includes a first not gate 51, a second not gate 52, a third not gate 53, a fourth not gate 54, and a first and nor gate 55. An input terminal of the first not gate 51 is used as a preset level signal input terminal of the logic judgment circuit, and an output terminal of the first not gate 51 is connected with a first input terminal of the first and nor gate 55. An input of the second not-gate 52 is adapted to serve as a first network connection, and an output of the second not-gate 52 is connected to a third input of the first and nor-gate 55. An input of the third not-gate 53 is used as a second network connection, and an output of the third not-gate 53 is connected to a fourth input of the first and nor-gate 55. An input of the fourth not gate 54 is connected to an output of the third not gate 53, and an output of the fourth not gate 54 is connected to a second input of the first and nor gate 55. The output terminal of the first and nor gate 55 is used as a logic determination result output terminal of the logic determination circuit.
Referring to fig. 5, a circuit diagram of a logic determining circuit in an embodiment is shown, in which the logic determining circuit includes three logic determining units. The three logic judgment units comprise a first logic unit 6, a second logic unit 7 and a third logic unit 8, and the three logic judgment units comprise a first not gate 61, a second not gate 62, a third not gate 63, a fourth not gate 64, a first and not gate 65, a first input end, a second input end, a third input end and a first output end. The input terminal of the first not gate 61 is used as the first input terminal of the logic judgment unit, and the output terminal of the first not gate 61 is connected with the first input terminal of the first and nor gate 65. The input of the second not gate 62 is used as the second input of the logic determining unit, and the output of the second not gate 62 is connected to the third input of the first and nor gate 65. An input terminal of the third not gate 63 is used as a third input terminal of the logic judgment unit, and an output terminal of the third not gate 64 is connected to a fourth input terminal of the first and nor gate 65. An input of the fourth not gate 64 is connected to an output of the third not gate 63, and an output of the fourth not gate 64 is connected to a second input of the first and nor gate 65. The output of the first and nor gate 65 is used as a first output of the logic decision unit. A first input terminal of the first logic unit 6 is used as a preset level signal input terminal of the logic judgment circuit, a second input terminal of the first logic unit 6 is connected with a first output terminal of the second logic unit 7, and a third input terminal of the first logic unit 6 is connected with a first output terminal of the third logic unit 8. A first input end of the second logic unit 7 is used for inputting a preset fourth level signal, and a second input end and a third input end of the second logic unit 7 are electrically connected with the first grid circuit board through at least one metal thimble respectively. A first input end of the third logic unit 8 is used for inputting a fourth level signal, and a second input end and a third input end of the third logic unit 8 are electrically connected with the second grid circuit board through at least one metal thimble respectively. In one embodiment, the predetermined fourth level signal is a low level.
IN one embodiment, the first grid board outputs the level signal IN72 and the level signal IN73 to the logic determining circuit of the detachment detection circuit, and the second grid board outputs the level signal IN82 and the level signal IN83 to the logic determining circuit of the detachment detection circuit. The level signal IN71 and the level signal IN81 are preset fourth level signals, and the level signal IN1 is a preset third level signal. In one embodiment, the third level signal is a high level H. The fourth level signal is a low level L. When the drilling tool works normally, the output end OUT1 of the logic judgment result of the logic judgment circuit is in a high level, and once the disassembly or drilling action affects the normal circulation of signals, the output end OUT1 of the logic judgment result is in a low level.
In the embodiment of the application, aiming at the characteristic that the electronic password card is easy to be detached, the electronic password card is internally provided with the detachment detection mechanism and the electronic password card circuit, the electronic password card circuit is arranged on the PCB circuit board, the detachment behavior is detected in real time by combining the mechanical structure of the shell, when detachment occurs, the detachment detection mechanism sends a detection signal to the electronic password card circuit, and the electronic password card circuit supplies power to the low-power-consumption SRAM core segment to remove the SRAM. When the low-power-consumption SRAM chip is not supplied with power, the internal data can completely disappear under the influence of the storage characteristics of the low-power-consumption SRAM chip, and the protection key stored in the low-power-consumption SRAM chip can also disappear so as to protect the key information. The power consumption of the low-power SRAM and the button battery is in the uA level when the low-power SRAM and the button battery are selected for power supply. The button cell can keep normal operation for more than three years under the condition of power failure according to the capacity of the button cell.
In one embodiment, the electronic password card is matched with the disassembly detection mechanism by the anti-drilling and anti-abrasion shell, two FPCs are adhered to the inner surfaces of the upper shell and the lower shell and are connected with the PCB through the ejector pins, when the drilling action is implemented, the FPC is inevitably contacted, because the MESH of the FPC is tightly wired, the drill bit can damage the integrity of the MESH line, and the disassembly detection circuit detects the trigger protection mechanism. In one embodiment, each FPC has two layers of horizontal wirings and one layer of vertical wirings, which are MESH.
Referring to fig. 6, a schematic structural diagram of an electronic cryptographic card circuit in an embodiment is shown, in which a metal thimble 22 is used to connect the housing 1 and the PCB 3. The one side towards the circuit board on shell 1 pastes FPC MESH circuit, and the circuit area is greater than whole circuit board to leave 8 metal contact, correspond 8 thimble weldings on PCB circuit board. The high and low levels flow into the metal contact on the shell 1 through the metal thimble and enter the upper layer of the FPC MESH, flow into the PCB circuit board from the output contact of the upper layer of the FPC MESH, flow into the lower layer of the FPC MESH through the metal thimble after winding the PCB circuit board for a circle, and finally flow into the disassembly detection circuit on the PCB circuit board through the contact and the metal thimble. The signal working path is complete when the shell 1 is disassembled, the metal contact is not contacted with the metal thimble 22 any more, the signal flow path is broken, and then the disassembly detection circuit outputs a corresponding signal to control the switch circuit to cut off the power supply of the storage unit. Likewise the drilling action may also trigger a protection mechanism. The electronic password card mechanical structure design disclosed in the application exquisitely and reasonably utilizes the shell and the circuit board to realize the structure of preventing the drill from being detached, and the electronic password card still adopts a low-power-consumption SRAM chip, can normally work even if the power-off protection mechanism is applied to the electronic password card mechanical structure design, and is high in reliability and transportability due to the adoption of the logic circuit design.
The application discloses take electron password card of anti-disassembly protection, including the casing, dismantle detection mechanism and electron password card circuit. The electronic password card circuit is arranged on the PCB circuit board, and the PCB circuit board is arranged inside the shell. The disassembly detection mechanism is arranged between the PCB circuit board and the shell and used for sending a second level signal to the electronic password card circuit when the disassembly detection mechanism detects that the shell is disassembled. The electronic password card circuit comprises a disassembly detection circuit, a storage unit circuit, a power supply and a switch circuit, wherein the disassembly detection circuit is used for controlling the switch circuit to disconnect the power supply from the storage unit circuit when receiving a second level signal sent by the disassembly detection mechanism so as to empty the stored electronic password information due to power loss of the storage unit circuit. Because the shell of the electronic password card is detected by the disassembly detection mechanism, when the shell is disassembled, the power supply of the storage unit circuit is disconnected so as to empty the stored electronic password information, and the safety of the electronic password card is improved. Besides the detection and disassembly prevention, the electronic password card is also provided with an anti-abrasion shell for preventing drilling, so that the condition that illegal molecules do not disassemble the shell and avoid the disassembly detection in a mode of grinding off the shell is avoided.
Those skilled in the art will appreciate that all or part of the functions of the various methods in the above embodiments may be implemented by hardware, or may be implemented by computer programs. When all or part of the functions of the above embodiments are implemented by a computer program, the program may be stored in a computer-readable storage medium, and the storage medium may include: a read only memory, a random access memory, a magnetic disk, an optical disk, a hard disk, etc., and the program is executed by a computer to realize the above functions. For example, the program may be stored in a memory of the device, and when the program in the memory is executed by the processor, all or part of the functions described above may be implemented. In addition, when all or part of the functions in the above embodiments are implemented by a computer program, the program may be stored in a storage medium such as a server, another computer, a magnetic disk, an optical disk, a flash disk, or a removable hard disk, and may be downloaded or copied to a memory of a local device, or may be version-updated in a system of the local device, and when the program in the memory is executed by a processor, all or part of the functions in the above embodiments may be implemented.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (10)
1. An electronic password card with anti-disassembly protection is characterized by comprising a shell, a disassembly detection mechanism and an electronic password card circuit;
the electronic password card circuit is arranged on a PCB circuit board, and the PCB circuit board is arranged inside the shell;
the disassembly detection mechanism is arranged between the PCB and the shell, is connected with the electronic password card circuit and is used for sending a first level signal to the electronic password card circuit; the electronic password card circuit is also used for sending a second level signal to the electronic password card circuit when the shell is detected to be detached;
the electronic password card circuit comprises a disassembly detection circuit, a storage unit circuit, a power supply and a switch circuit;
the power supply is connected with the storage unit circuit through the switch circuit and used for supplying power to the storage unit circuit through the switch circuit;
the storage unit circuit is used for storing electronic password information; the storage unit circuit is also used for clearing the stored electronic password information when the power is lost;
the disassembly detection circuit is connected with the switch circuit and used for sending a switch disconnection electric signal to the switch circuit when receiving a second level signal sent by the disassembly detection mechanism;
the switch circuit is also used for responding to the switch disconnection electric signal to disconnect the power supply and the storage unit circuit so as to empty the stored electronic password information due to power loss of the storage unit circuit.
2. The electronic combination card of claim 1, wherein the detachment detection mechanism includes a flexible circuit board and at least two metal ejector pins;
the flexible circuit board is tightly attached to the inner surface of the shell, each metal thimble is pressed between the PCB and the flexible circuit board, and the flexible circuit board is electrically connected with the disassembly detection circuit through the pressed metal thimble;
when each metal thimble is electrically connected with the PCB and the flexible circuit board, the flexible circuit board is used for sending the first level signal to the disassembly detection circuit;
when the housing is disassembled and at least one metal thimble is disconnected with the flexible circuit board, the flexible circuit board is further used for sending the second level signal to the disassembly detection circuit.
3. The electronic cryptographic card of claim 2, wherein the detachment detection circuit is a logic judgment circuit including a predetermined level signal input terminal, a logic signal input terminal, and a logic judgment result output terminal; the preset level signal input end is used for inputting a preset third level signal; the logic signal input end is electrically connected with the disassembly detection mechanism and is used for inputting the first level signal or the second level signal; the logic judgment result output end is connected with the switch circuit;
the logic judgment circuit is used for carrying out logic judgment on the third level signal and the first level signal or the second level signal output by the disassembly detection mechanism, and sending a switch disconnection electric signal to the switch circuit through the logic judgment result output end when the second level signal is input to the logic signal input end.
4. The electronic cryptographic card of claim 3, wherein the flexible circuit board is in a grid shape.
5. The electronic combination card of claim 4, wherein the flexible circuit board comprises a first mesh circuit board and a second mesh circuit board, the first and second mesh circuit boards being disposed on respective opposite interior surfaces of the housing.
6. The electronic cryptographic card of claim 5, wherein said logic signal input comprises a first network connection terminal and a second network connection terminal, said first network connection terminal being electrically connected to said first network circuit board through at least one of said metallic pins, said second network connection terminal being electrically connected to said second network circuit board through at least one of said metallic pins.
7. The electronic cryptographic card of claim 6, wherein the logic decision circuit comprises a first logic circuit comprising a first not gate, a second not gate, a third not gate, a fourth not gate, and a first and nor gate;
the input end of the first not gate is used as a preset level signal input end of the logic judgment circuit, and the output end of the first not gate is connected with the first input ends of the first and not gates;
the input end of the second not gate is used as the first network connection end, and the output end of the second not gate is connected with the third input ends of the first and nor gates;
the input end of the third not gate is used as the second network connection end, and the output end of the third not gate is connected with the fourth input end of the first and nor gates;
the input end of the fourth not gate is connected with the output end of the third not gate, and the output end of the fourth not gate is connected with the second input ends of the first and the nor gates;
and the output end of the first AND/OR gate is used as the output end of the logic judgment result of the logic judgment circuit.
8. The electronic cryptographic card of claim 6, wherein the logic decision circuit comprises three logic decision units; the logic judgment unit comprises a first NOT gate, a second NOT gate, a third NOT gate, a fourth NOT gate, a first and NOR gate, a first input end, a second input end, a third input end and a first output end; the input end of the first not gate is used as the first input end of the logic judgment unit, and the output end of the first not gate is connected with the first input ends of the first and nor gates; the input end of the second not gate is used as the second input end of the logic judgment unit, and the output end of the second not gate is connected with the third input ends of the first and nor gates; the input end of the third not gate is used as the third input end of the logic judgment unit, and the output end of the third not gate is connected with the fourth input end of the first and nor gate; the input end of the fourth not gate is connected with the output end of the third not gate, and the output end of the fourth not gate is connected with the second input ends of the first and the nor gates; the output end of the first and NOR gate is used as the first output end of the logic judgment unit;
the three logic judgment units comprise a first logic unit, a second logic unit and a third logic unit; the first input end of the first logic unit is used as a preset level signal input end of the logic judgment circuit, the second input end of the first logic unit is connected with the first output end of the second logic unit, and the third input end of the first logic unit is connected with the first output end of the third logic unit;
the first input end of the second logic unit is used for inputting a preset fourth level signal, and the second input end and the third input end of the second logic unit are electrically connected with the first grid circuit board through at least one metal thimble respectively;
the first input end of the third logic unit is used for inputting the fourth level signal, and the second input end and the third input end of the third logic unit are electrically connected with the second grid circuit board through at least one metal thimble respectively.
9. The electronic cryptographic card of claim 1, wherein the power supply comprises a rechargeable battery or a button cell.
10. The electronic cryptographic card of claim 1, wherein the memory cell circuit comprises a low power SRAM chip.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114785503A (en) * | 2022-06-16 | 2022-07-22 | 北京智芯半导体科技有限公司 | Cipher card, root key protection method thereof and computer readable storage medium |
| CN115460609A (en) * | 2022-11-11 | 2022-12-09 | 北京数盾信息科技有限公司 | Detection apparatus for password card and password card |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0425087A2 (en) * | 1989-09-22 | 1991-05-02 | International Business Machines Corporation | Method and apparatus for selecting, orienting and testing electronic components |
| CA2088900A1 (en) * | 1992-07-27 | 1994-01-28 | James S. Bianco | Intelligent lock system |
| US20110055086A1 (en) * | 2009-08-31 | 2011-03-03 | Mcnicoll Grant A | Secure circuit board assembly |
| WO2014082477A1 (en) * | 2012-11-29 | 2014-06-05 | 深圳市新国都技术股份有限公司 | Protection method for data information about electronic device and protection circuit therefor |
| CN108121919A (en) * | 2018-01-12 | 2018-06-05 | 山东渔翁信息技术股份有限公司 | A kind of encryption apparatus |
| CN209657304U (en) * | 2019-06-11 | 2019-11-19 | 王岩松 | A kind of solid state hard disk preventing disassembly auto-destruct |
| US20200125773A1 (en) * | 2018-10-22 | 2020-04-23 | Nanning Fugui Precision Industrial Co., Ltd. | Anti-tamper mechanism and electronic device using the same |
| WO2020125840A1 (en) * | 2018-12-18 | 2020-06-25 | GRID INVENT gGmbH | Electronic element and electrically controlled display element |
| CN112906849A (en) * | 2021-05-06 | 2021-06-04 | 北京数盾信息科技有限公司 | Password card cover opening detection method and device and password card |
| CN113129991A (en) * | 2021-04-01 | 2021-07-16 | 深圳市纽创信安科技开发有限公司 | Chip safety protection method and circuit for ROMBIST test |
| CN116432252A (en) * | 2022-12-30 | 2023-07-14 | 支付宝(杭州)信息技术有限公司 | Anti-disclosure board card, anti-disclosure method and electronic equipment |
-
2021
- 2021-07-29 CN CN202110862371.0A patent/CN113496047B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0425087A2 (en) * | 1989-09-22 | 1991-05-02 | International Business Machines Corporation | Method and apparatus for selecting, orienting and testing electronic components |
| CA2088900A1 (en) * | 1992-07-27 | 1994-01-28 | James S. Bianco | Intelligent lock system |
| US20110055086A1 (en) * | 2009-08-31 | 2011-03-03 | Mcnicoll Grant A | Secure circuit board assembly |
| WO2014082477A1 (en) * | 2012-11-29 | 2014-06-05 | 深圳市新国都技术股份有限公司 | Protection method for data information about electronic device and protection circuit therefor |
| CN108121919A (en) * | 2018-01-12 | 2018-06-05 | 山东渔翁信息技术股份有限公司 | A kind of encryption apparatus |
| US20200125773A1 (en) * | 2018-10-22 | 2020-04-23 | Nanning Fugui Precision Industrial Co., Ltd. | Anti-tamper mechanism and electronic device using the same |
| WO2020125840A1 (en) * | 2018-12-18 | 2020-06-25 | GRID INVENT gGmbH | Electronic element and electrically controlled display element |
| CN209657304U (en) * | 2019-06-11 | 2019-11-19 | 王岩松 | A kind of solid state hard disk preventing disassembly auto-destruct |
| CN113129991A (en) * | 2021-04-01 | 2021-07-16 | 深圳市纽创信安科技开发有限公司 | Chip safety protection method and circuit for ROMBIST test |
| CN112906849A (en) * | 2021-05-06 | 2021-06-04 | 北京数盾信息科技有限公司 | Password card cover opening detection method and device and password card |
| CN116432252A (en) * | 2022-12-30 | 2023-07-14 | 支付宝(杭州)信息技术有限公司 | Anti-disclosure board card, anti-disclosure method and electronic equipment |
Non-Patent Citations (1)
| Title |
|---|
| 王国民;闻海霞;: "基于MAXQ1850安全芯片的防窥测和拆卸的磁条卡磁头防护设计", 信息通信, no. 05, 15 July 2013 (2013-07-15), pages 55 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114785503A (en) * | 2022-06-16 | 2022-07-22 | 北京智芯半导体科技有限公司 | Cipher card, root key protection method thereof and computer readable storage medium |
| CN114785503B (en) * | 2022-06-16 | 2022-09-23 | 北京智芯半导体科技有限公司 | Cipher card, root key protection method thereof and computer readable storage medium |
| CN115460609A (en) * | 2022-11-11 | 2022-12-09 | 北京数盾信息科技有限公司 | Detection apparatus for password card and password card |
| CN115460609B (en) * | 2022-11-11 | 2023-03-03 | 北京数盾信息科技有限公司 | Detection device for password card and password card |
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|---|---|
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