CN115460609B - Detection device for password card and password card - Google Patents
Detection device for password card and password card Download PDFInfo
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- CN115460609B CN115460609B CN202211413800.7A CN202211413800A CN115460609B CN 115460609 B CN115460609 B CN 115460609B CN 202211413800 A CN202211413800 A CN 202211413800A CN 115460609 B CN115460609 B CN 115460609B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/12—Detection or prevention of fraud
- H04W12/121—Wireless intrusion detection systems [WIDS]; Wireless intrusion prevention systems [WIPS]
- H04W12/122—Counter-measures against attacks; Protection against rogue devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
Abstract
The invention provides a detection device of a password card and the password card, the detection device comprises: the grid network detection circuit is used for outputting a detection signal when detecting that the grid network in contact connection with the password card shell is broken; and the processor is used for entering a safety protection state according to the detection signal. The scheme of the invention can realize effective protection of the password card and improve the safety of the password card.
Description
Technical Field
The present invention relates to the field of cryptographic card detection technologies, and in particular, to a cryptographic card detection apparatus and a cryptographic card.
Background
The MESH network MESH network can detect destructive attack behaviors such as cutting and drilling on a shell by the design of clamping and sticking a password card shell on a three-level commercial password. However, in the prior art, the cover opening detection of the password card shell has no effective method, so that the password card cannot be effectively protected, and the safety of the password card is threatened.
Disclosure of Invention
The invention aims to provide a detection device of a password card and the password card, which can realize effective protection of the password card and improve the safety of the password card.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a cryptographic card detection apparatus, comprising:
the grid network detection circuit is used for outputting a detection signal when detecting that the grid network in contact connection with the password card shell is broken;
and the processor is used for entering a safety protection state according to the detection signal.
Optionally, the mesh network detection circuit includes:
and the at least one detection circuit is in contact connection with the password card shell and is used for outputting the detection signal when detecting that the grid network interface corresponding to the detection circuit is broken.
Optionally, the at least one detection circuit includes:
the first detection circuit, the second detection circuit, the third detection circuit and the fourth detection circuit are in contact connection with the password card shell;
at least one of the first detection circuit, the second detection circuit, the third detection circuit and the fourth detection circuit outputs the detection signal when detecting that the corresponding grid network interface is broken.
Optionally, the first detection circuit includes: the first key is provided with a first pin, a second pin, a third pin and a fourth pin;
the first pin is electrically connected with a first network interface of the grid network, and the detection signal is output when the level of the first pin changes from low to high;
the second pin is grounded through a first resistor; the third pin and the fourth pin are suspended.
Optionally, the second detection circuit includes: the second key is provided with a first pin, a second pin, a third pin and a fourth pin;
the first pin is electrically connected with a second network interface of the grid network, and the detection signal is output when the level of the first pin changes from low to high;
the second pin is grounded through a second resistor; the third pin and the fourth pin are suspended.
Optionally, the third detection circuit includes: the third key is provided with a first pin, a second pin, a third pin and a fourth pin;
the first pin is electrically connected with a third network interface of the grid network, and the detection signal is output when the level of the first pin changes from low to high;
the second pin is grounded through a third resistor; the third pin and the fourth pin are suspended.
Optionally, the fourth detection circuit includes: the fourth key is provided with a first pin, a second pin, a third pin and a fourth pin;
the first pin is electrically connected with a fourth network interface of the grid network, and the detection signal is output when the level of the first pin changes from low to high;
the second pin is grounded through a fourth resistor; the third pin and the fourth pin are suspended.
Optionally, the detection apparatus for a password card further includes:
the power supply unit is connected with a system power supply and is electrically connected with the grid network detection circuit;
when the system power supply is in a working state, the system power supply supplies power to the grid network detection circuit;
and when the system power supply is in a power-off state, the power supply unit supplies power to the grid network detection circuit.
Optionally, the detection apparatus for a password card further includes: the button battery is electrically connected with the power supply unit; when the system power supply is in a power-on state, the power supply unit is powered by the system power supply; when the system power supply is in a power-off state, the power supply unit is powered by the button cell.
An embodiment of the present invention further provides a password card, including: the password card comprises a password card shell, a grid network in contact connection with the password card shell, and the detection device of the password card.
The scheme of the invention at least comprises the following beneficial effects:
when the grid network detection circuit detects that the grid network in contact connection with the password card shell is broken, a detection signal is output; and the processor enters a safety protection state according to the detection signal. Therefore, the password card can be effectively detected, the password card can be effectively protected, and the safety of the password card is improved.
Drawings
FIG. 1 is a block diagram of a device for detecting a password card according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a MESH network interface circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a first detection circuit, a second detection circuit, a third detection circuit, and a fourth detection circuit according to an embodiment of the invention;
FIG. 4 is a simplified schematic diagram of a detection circuit of an embodiment of the present invention;
FIG. 5 is a block diagram of a processor circuit according to an embodiment of the invention;
FIG. 6 is a schematic diagram of a power supply switching control circuit of the power supply unit according to the embodiment of the invention;
fig. 7 is a schematic workflow diagram of a detection apparatus for a cryptographic card according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides a detection apparatus 1 for a password card, including:
the grid network detection circuit 11 is used for outputting a detection signal when detecting that the grid network in contact connection with the password card shell is broken; the contact connection can be a series connection, and when the password card shell is damaged, such as cutting, uncovering and the like, the access of the grid network is disconnected;
and the processor 12 is used for entering a safety protection state according to the detection signal.
In this embodiment, when the grid network detection circuit 11 detects that the grid network in contact connection with the cipher card shell is disconnected, a detection signal is output; and the processor enters a safety protection state according to the detection signal and stops the password-related service. The processor can be a Micro Control Unit (MCU), so that the effective detection of the password card is realized, the effective protection of the password card is realized, and the safety of the password card is improved.
As shown in fig. 2, the MESH network interface circuit includes: the connector J19 is provided with 15 pins, wherein the first pin, the fourth pin, the seventh pin and the tenth pin are electrically connected with the power supply unit, and the second pin, the third pin, the fifth pin, the sixth pin, the eighth pin, the ninth pin and the eleventh pin are respectively connected with a network interface; the fourteenth pin and the fifteenth pin are grounded.
The MESH network is powered by a power supply unit VBAT, and when the password card shell is not damaged, all network interfaces of the MESH network are in a normal access state;
in an optional embodiment of the present invention, the mesh network detection circuit includes: and the at least one detection circuit is in contact connection with the password card shell and is used for outputting the detection signal when detecting that the grid network interface corresponding to the detection circuit is broken.
As shown in fig. 3, the at least one detection circuit includes:
the first detection circuit, the second detection circuit, the third detection circuit and the fourth detection circuit are in contact connection with the password card shell;
at least one of the first detection circuit, the second detection circuit, the third detection circuit and the fourth detection circuit outputs the detection signal when the grid network is detected to be broken.
Wherein the first detection circuit comprises: the key comprises a first key K1, a second key K1 and a third key K, wherein the first key K1 is provided with a first pin, a second pin, a third pin and a fourth pin;
the first pin is electrically connected with a first network interface mesh0_0 of the grid network, and the detection signal is output when the level of the first pin changes from low to high;
the second pin is grounded through a first resistor; the third pin and the fourth pin are suspended.
Wherein the second detection circuit comprises: the second key K2 is provided with a first pin, a second pin, a third pin and a fourth pin;
the first pin is electrically connected with a second network interface mesh1_1 of the grid network, and the detection signal is output when the level of the first pin changes from low to high;
the second pin is grounded through a second resistor; the third pin and the fourth pin are suspended.
Wherein the third detection circuit comprises: a third key K3, wherein the third key K3 is provided with a first pin, a second pin, a third pin and a fourth pin;
the first pin is electrically connected with a third network interface mesh2_2 of the grid network, and the detection signal is output when the level of the first pin changes from low to high;
the second pin is grounded through a third resistor; the third pin and the fourth pin are suspended.
Wherein the fourth detection circuit comprises: a fourth key K4, which is provided with a first pin, a second pin, a third pin and a fourth pin;
the first pin is electrically connected with a fourth network interface mesh3_3 of the grid network, and the detection signal is output when the level of the first pin changes from low to high;
the second pin is grounded through a fourth resistor; the third pin and the fourth pin are suspended.
As shown in fig. 4, which is a simplified schematic diagram of the first detection circuit, the second detection circuit, the third detection circuit, or the fourth detection circuit, when the shell of the cryptographic card is installed, the detection switch is in a closed state, the whole circuit is a pass, the level value detected by the MCU is less than 0.1V, which is a low level, and the MCU does not detect a high level, which does not trigger a response; when the uncapping behavior is detected, the detection switch bounces open, the circuit is broken, the MCU detects a high level, the response of the MCU is triggered, the MCU records the uncapping state, and the key clearing operation is carried out;
when a password card cutting action occurs, the MESH network tightly attached to the inside of the shell is damaged, the circuit is broken, the MCU also detects a high level, the protection response of the MCU is triggered, and the MCU records the uncapping state and clears the secret key.
As shown in FIG. 5, the four pins EXTS0, EXTS1, EXTS4, EXTS5 of the processor are respectively defined as MESH0, MESH1, MESH2, MESH3, the internal pull-up resistance value is 3.8M, and the high level trigger response is set. J19 is the MESH net physical interface, and the MESH net PCB wiring is designed to be parallel winding of MESH signals and VBAT signals.
In an optional embodiment of the present invention, the apparatus for detecting a password card further includes:
the power supply unit VBAT is connected with a system power MH _3V3 and is electrically connected with the grid network detection circuit;
when the system power supply is in a working state, the system power supply supplies power to the grid network detection circuit;
and when the system power supply is in a power-off state, the power supply unit supplies power to the grid network detection circuit.
In this embodiment, the power supply of the detection device of the cryptocard is divided into two parts, one is system power MH _3V3 and the other is battery power supply unit VBAT, when the system power is in the power-on state, the system power MH _3V3 supplies power for the mesh network detection circuit, the battery power is not consumed, when the system power is in the power-off state, the battery BAT supplies power for the mesh network detection circuit, at this moment, only the detection circuit is in the power-on state, and the power consumption is extremely low.
As shown in fig. 6, in an alternative embodiment of the present invention, the apparatus for detecting a password card further includes: the button battery is electrically connected with the power supply unit; when the system power supply is in a power-on state, the power supply unit is powered by the system power supply; when the system power supply is in a power-off state, the power supply unit is powered by the button battery.
In the embodiment, the power supply unit is supplied by the button battery and the system power supply, and when the system power supply is powered on, the power supply unit is supplied by the system power supply MH _3V3, so that the electric quantity of the battery is not consumed; when the system power supply is not on, the power supply unit is powered by the button cell, so that the extremely low power consumption of the password card is ensured.
As shown in fig. 7, the work flow of the detection device for the password card includes:
after detecting a specific attack, transmitting an attack signal to a detection pin of the processor, and after receiving the signal, the MCU records a mark of the attack signal and stores the mark into the internal flash memory.
The specific response functions are divided into the following two cases:
if the attacked cryptographic card device works, the MCU records the attack signal when the detection device detects the attack, then immediately stops the cryptographic related service, makes an early warning, and then enters a specific protection state.
If the attacked cryptographic card device is not in a working state, namely the device is not powered on, at this time, if the device is attacked, the detection device can still transmit an attack signal to the MCU, the MCU only records the attack signal without further operation, but once the cryptographic card device is powered on again to operate, the device reads the flag bit of the attack signal during self-checking, the MCU immediately stops cryptographic related services as well, early warning is given, and then the device enters a specific protection state. Therefore, the password card is effectively protected, and the safety of the password card is improved.
An embodiment of the present invention further provides a cryptographic card, including: the password card comprises a password card shell, a grid network in contact connection with the password card shell, and the detection device of the password card.
All the implementation modes of the detection device of the password card are suitable for the embodiment of the password card, and the same technical effect can be achieved.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions may be stored in a computer-readable storage medium if they are implemented in the form of software functional units and sold or used as separate products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
Furthermore, it should be noted that in the apparatus and method of the present invention, it is obvious that each component or each step may be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.
Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a well-known general purpose device. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or device. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that such storage media can be any known storage media or any storage media developed in the future. It is also noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (4)
1. A device for detecting a cryptographic card, comprising:
the grid network detection circuit is used for outputting a detection signal when detecting that the grid network in contact connection with the password card shell is broken;
the processor is used for entering a safety protection state according to the detection signal;
wherein the mesh network detection circuit comprises:
the detection circuit is in contact connection with the password card shell and is used for outputting the detection signal when detecting that the grid network interface corresponding to the detection circuit is broken;
wherein the at least one detection circuit comprises:
the first detection circuit, the second detection circuit, the third detection circuit and the fourth detection circuit are in contact connection with the password card shell;
at least one of the first detection circuit, the second detection circuit, the third detection circuit and the fourth detection circuit outputs the detection signal when detecting that the corresponding grid network interface is broken;
wherein the first detection circuit comprises: the first key is provided with a first pin, a second pin, a third pin and a fourth pin;
the first pin is electrically connected with a first network interface of the grid network, and the detection signal is output when the level of the first pin changes from low to high;
the second pin is grounded through a first resistor; the third pin and the fourth pin are suspended;
wherein the second detection circuit comprises: the second key is provided with a first pin, a second pin, a third pin and a fourth pin;
the first pin is electrically connected with a second network interface of the grid network, and the detection signal is output when the level of the first pin changes from low to high;
the second pin is grounded through a second resistor; the third pin and the fourth pin are suspended;
wherein the third detection circuit comprises: the third key is provided with a first pin, a second pin, a third pin and a fourth pin;
the first pin is electrically connected with a third network interface of the grid network, and the detection signal is output when the level of the first pin changes from low to high;
the second pin is grounded through a third resistor; the third pin and the fourth pin are suspended;
wherein the fourth detection circuit comprises: the fourth key is provided with a first pin, a second pin, a third pin and a fourth pin;
the first pin is electrically connected with a fourth network interface of the grid network, and the detection signal is output when the level of the first pin changes from low to high;
the second pin is grounded through a fourth resistor; the third pin and the fourth pin are suspended;
when a password card cutting action occurs, a shell of the password card contacts a connected grid network to form an open circuit, a processor detects a high level signal output by at least one of a first detection circuit, a second detection circuit, a third detection circuit and a fourth detection circuit, a protection response of the processor is triggered, the processor records an uncapping state and clears a secret key, the processor records an attack signal, the password card is electrified and operated again, a marker bit of the attack signal can be read when equipment is subjected to self-detection, the processor can immediately stop password-related services, make early warning and enter a specific protection state.
2. The apparatus for detecting a cryptographic card of claim 1, further comprising:
the power supply unit is connected with a system power supply and is electrically connected with the grid network detection circuit;
when the system power supply is in a working state, the system power supply supplies power to the grid network detection circuit;
and when the system power supply is in a power-off state, the power supply unit supplies power to the grid network detection circuit.
3. The apparatus for detecting a cryptographic card of claim 2, further comprising: the button battery is electrically connected with the power supply unit; when the system power supply is in a power-on state, the power supply unit is powered by the system power supply; when the system power supply is in a power-off state, the power supply unit is powered by the button battery.
4. A cryptographic card, comprising: a cryptographic card housing and a mesh network in contact with the cryptographic card housing, characterized in that it further comprises a cryptographic card detection device according to any of claims 1 to 3.
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| CN202211413800.7A CN115460609B (en) | 2022-11-11 | 2022-11-11 | Detection device for password card and password card |
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| CN202211413800.7A CN115460609B (en) | 2022-11-11 | 2022-11-11 | Detection device for password card and password card |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112446058A (en) * | 2020-12-16 | 2021-03-05 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Data safety protection device |
| 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 |
| CN113496047A (en) * | 2021-07-29 | 2021-10-12 | 深圳市纽创信安科技开发有限公司 | Electronic password card with anti-disassembly protection |
| CN115292762A (en) * | 2022-08-07 | 2022-11-04 | 北京国领科技有限公司 | Method for opening and closing active data self-destruction under system power-off state |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110851328B (en) * | 2019-11-12 | 2023-03-21 | 成都三零嘉微电子有限公司 | Method for detecting abnormal power failure of password card in PKCS #11 application |
| CN111352862A (en) * | 2020-03-05 | 2020-06-30 | 中安云科科技发展(山东)有限公司 | Key destroying method, system, password card and password machine |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112446058A (en) * | 2020-12-16 | 2021-03-05 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Data safety protection device |
| 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 |
| CN113496047A (en) * | 2021-07-29 | 2021-10-12 | 深圳市纽创信安科技开发有限公司 | Electronic password card with anti-disassembly protection |
| CN115292762A (en) * | 2022-08-07 | 2022-11-04 | 北京国领科技有限公司 | Method for opening and closing active data self-destruction under system power-off state |
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