CN108154049B - Electronic equipment with data protection function - Google Patents
Electronic equipment with data protection function Download PDFInfo
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- CN108154049B CN108154049B CN201611109148.4A CN201611109148A CN108154049B CN 108154049 B CN108154049 B CN 108154049B CN 201611109148 A CN201611109148 A CN 201611109148A CN 108154049 B CN108154049 B CN 108154049B
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- 238000003825 pressing Methods 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims description 111
- 238000011084 recovery Methods 0.000 claims description 31
- 230000001012 protector Effects 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 5
- 230000006870 function Effects 0.000 description 7
- 238000013461 design Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 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
- G06F21/60—Protecting data
- G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures
-
- 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
- G06F21/86—Secure or tamper-resistant housings
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07G—REGISTERING THE RECEIPT OF CASH, VALUABLES, OR TOKENS
- G07G1/00—Cash registers
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Software Systems (AREA)
- General Health & Medical Sciences (AREA)
- Bioethics (AREA)
- Health & Medical Sciences (AREA)
- Storage Device Security (AREA)
- Input From Keyboards Or The Like (AREA)
Abstract
An electronic device with data protection function comprises a mainboard, a control unit arranged on the mainboard, a first conductive unit and a second conductive unit which are respectively arranged on the mainboard and are respectively electrically connected with the control unit, a protection device arranged on the mainboard and covering the control unit, and a shell covering the protection device. The protection device comprises a protection body electrically connected with a first connection unit and a second connection unit, two first connection units and two second connection units which respectively penetrate through the protection body, and a plurality of contact units arranged on the first connection units and the second connection units. The shell comprises a plurality of pressing pieces, and the pressing pieces are respectively used for pressing the first connecting unit and the second connecting unit and enabling the contact units corresponding to the first connecting unit and the second connecting unit to be in stable contact with the corresponding first conducting unit and the second conducting unit and form an electric path.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to an electronic device for financial payment, and more particularly, to an electronic device with data protection function.
[ background of the invention ]
With the rapid development of financial science and technology, electronic equipment convenient for rapidly processing financial transactions is widely available, such as: POS (Point of Sales), etc. Generally, electronic devices for processing financial payment related services have a built-in mechanism for protecting confidential data, so as to avoid the risk of stealing or tampering the confidential data during the transaction process. A common protection mechanism is to use a security protection device of an electronic device to specially process confidential data acquired and stored during a financial transaction process, and when the security protection device is damaged by external force or is invaded by stealing signals, a processor of the security protection device destroys confidential data such as financial transaction information, account number keys, PIN codes and the like in a memory, so as to ensure the security of the data. Therefore, it is necessary for relevant practitioners to carefully study and discuss how to improve the protection of the security device, effectively detect whether the security device is penetrated by external force, whether the internal data transmission mode is tampered, and avoid the internal data being stolen.
[ summary of the invention ]
Therefore, it is an object of the present invention to provide an efficient electronic device with data protection function.
Therefore, the electronic device with the data protection function comprises a mainboard, a control unit arranged on the mainboard, a first conductive unit and a second conductive unit which are respectively arranged on the mainboard and are respectively electrically connected with the control unit, a protection device arranged on the mainboard and covering the control unit, and a shell arranged on the mainboard and covering the protection device.
The protection device comprises a protection body covering the control unit, a first connecting unit and a second connecting unit which are respectively arranged on the protection body, and a plurality of contact units arranged on the first connecting unit and the second connecting unit. The protection body is provided with a detection circuit layer, the first connecting unit and the second connecting unit are respectively and electrically connected with the detection circuit layer, and the first connecting unit and the second connecting unit respectively correspond to the first conducting unit and the second conducting unit and are respectively matched with the corresponding contact units to be contacted with the first conducting unit and the second conducting unit to form an electric path.
The shell comprises a shell body and a plurality of pressing pieces which are arranged on the shell body, are positioned in the shell body and extend towards the direction of the protection device. The pressing parts correspond to the first connecting unit and the second connecting unit respectively and are used for pressing the first connecting unit and the second connecting unit respectively, and the contact units corresponding to the first connecting unit and the second connecting unit are contacted with the corresponding first conducting unit and the second conducting unit respectively. The control unit sends out a detection instruction, the first conductive unit generates a recovery instruction after passing through the first connecting unit and the detection circuit layer, and the recovery instruction is transmitted back to the control unit from the second connecting unit to the second conductive unit. When the reply command received by the control unit is different from the detection command, the control unit executes a data protection mode to perform internal data protection.
Preferably, the first connecting unit of the protection device has two first connecting pieces penetrating through the protection body, the second connecting unit has two second connecting pieces penetrating through the protection body, the first conductive unit has two first conductive pieces corresponding to the first connecting pieces, the second conductive unit has two second conductive pieces corresponding to the second connecting pieces, the first and second connecting pieces are respectively electrically connected to the detection circuit layer and the first connecting pieces are respectively connected to the second connecting pieces by connecting to the detection circuit layer, the contact units are respectively disposed on the first connecting pieces and the second connecting pieces, and the pressing piece is used for pressing the first and second connecting pieces and making the contact units corresponding to the first and second connecting pieces respectively contact with the corresponding first and second conductive pieces.
Preferably, the detection circuit layer of the protection body has a first detection circuit and a second detection circuit, one of the first connection members of the first connection unit is electrically connected to the first detection circuit and connected to one of the second connection members corresponding to the second connection unit by the first detection circuit, and the other of the first connection members of the first connection unit is electrically connected to the second detection circuit and connected to the other of the second connection members corresponding to the second connection unit by the second detection circuit.
Preferably, the control unit includes a processor and a data protector connected to the processor, the processor sends the detection command and receives the recovery command, the detection command has two sets of detection bit information, one set of detection bit information of the detection command is generated by one first conductive member of the first conductive unit passing through one first connecting member of the first connecting unit and passing through the first detection circuit of the detection circuit layer, the other set of detection bit information of the detection command is generated by the other first conductive member of the first conductive unit passing through the other first connecting member of the first connecting unit and passing through the second detection circuit of the detection circuit layer, when any set of recovery bit information of the recovery command received by the processor of the control unit is different from the corresponding set of detection bit information, the processor executes the data protection mode to protect the data protector.
Preferably, the processor of the control unit has a transmission time, and when a time difference between the set of detection bit information of the detection instruction sent by the processor and the set of recovery bit information of the recovery instruction received by the processor is different from the transmission time, the processor executes the data protection mode to protect the data protector.
Preferably, the transmission time has an upper limit and a lower limit, and when a time difference between the time of the set of detection bit information sent by the processor and the time of the set of recovery bit information received by the processor is greater than the upper limit and less than the lower limit, the processor executes the data protection mode to protect the data protector.
Preferably, the electronic device further comprises a plurality of fixing units, wherein the fixing units are used for fixing the housing of the housing on the main board in a locking manner and enabling the pressing piece to press the first connecting piece and the second connecting piece so as to enable the contact units corresponding to the first connecting piece and the second connecting piece to be in contact with the corresponding first conductive piece and the second conductive piece.
Preferably, the first and second connecting members of the protection device are metal sheets penetrating through the protection body, and the contact unit is a metal bump respectively disposed on the first and second connecting members.
Preferably, the first and second connectors of the guard are integrally formed with the corresponding contact units.
Preferably, the pressing member of the housing is a convex pillar disposed in the casing and extending toward the protection device.
The invention has the beneficial effects that: the design that the pressing piece of the shell respectively presses the first connecting unit and the second connecting unit of the protection device ensures that the contact units corresponding to the first connecting unit and the second connecting unit are contacted with the corresponding first conducting unit and the second conducting unit to form an electric circuit, and the detection instruction of the control unit can generate the return instruction after passing through the detection circuit layer by the first conducting unit through the first connecting unit, and the return instruction can pass through the second connecting unit to the second conducting unit and then return to the control unit.
[ description of the drawings ]
FIG. 1 is an exploded view of an electronic device with data protection function according to an embodiment of the present invention; FIG. 2 is an exploded perspective view illustrating the connection between a housing, a shielding device and a first and second conductive elements of the present embodiment; and
fig. 3 is a perspective view illustrating a case of the present embodiment combined with a main board.
[ detailed description ] embodiments
Before the present invention is described in detail, it should be noted that in the following description, like elements are represented by like reference numerals.
Referring to fig. 1, fig. 2 and fig. 3, the electronic device with data protection function of the present invention includes a main board 1, a control unit 2 disposed on the main board 1, two first conductive units 3 and two second conductive units 4 disposed on the main board 1 and respectively electrically connected to the control unit 2, a protection device 5 disposed on the main board 1 and covering the control unit 2, a housing 6 disposed on the main board 1 and covering the protection device 5, and a plurality of fixing units 7 for locking the housing 6 on the main board 1. The control unit 2 includes a processor 21, and a data protector 22 connected to the processor 21.
The protection device 5 includes a protection body 51 covering the control unit 2, two first connection units 53 and two second connection units 54 respectively disposed on the protection body 51, and a plurality of contact units 55 respectively disposed on the first connection units 53 and the second connection units 54. The protection body 51 has a detection circuit layer 52 connected to the first connection unit 53 and the second connection unit 54. The first connecting unit 53 has two first connecting members 531 penetrating through the protection body 51, and the second connecting unit 54 has two second connecting members 541 penetrating through the protection body 51. The first conductive unit 3 has two first conductive members 31 corresponding to the first connecting members 531, and the second conductive unit 4 has two second conductive members 41 corresponding to the second connecting members 541. The contact units 55 are respectively disposed on the first connecting member 531 and the second connecting member 541 and respectively extend toward the corresponding first conductive member 31 and the second conductive member 41.
The detection circuit layer 52 of the protection body 51 has a first detection circuit 521 and a second detection circuit 522. One of the first connecting members 531 of the first connecting unit 53 is electrically connected to the first detecting circuit 521 and is connected to one of the second connecting members 541 corresponding to the second connecting unit 54 by the first detecting circuit 521. The other first connection member 531 of the first connection unit 53 is electrically connected to the second detection circuit 522 and is connected to the other second connection member 541 corresponding to the second connection unit 54 by the second detection circuit 522.
The housing 6 includes a casing 61, and a plurality of pressing members 62 disposed on the casing 61 and located in the casing 61 and extending toward the protection device 5. The pressing element 62 corresponds to the first connecting element 531 of the first connecting unit 53 and the second connecting element 541 of the second connecting unit 54, respectively, and is used to press the first connecting element 531 and the second connecting element 541, respectively, so that the contact units 55 corresponding to the first connecting element 531 and the second connecting element 541 are in contact with the corresponding first conductive element 31 and second conductive element 41 to form an electrical path. In this embodiment, the first connecting member 531 and the second connecting member 541 penetrate through the protection body 51, are electrically connected to the corresponding first detecting circuit 521 and the corresponding second detecting circuit 522, and can be in contact with the corresponding contact unit 55 to form an electrical path, but not limited thereto, the first connecting member 531 and the second connecting member 541 may also be embedded on the protection body 51, and are electrically connected to the corresponding first detecting circuit 521 and the corresponding second detecting circuit 522, and can be in contact with the corresponding contact unit 55 to form an electrical path.
When the protector is installed, the protection body 51 of the protector 5 covers the control unit 2, and the first connecting member 531 of the first connecting unit 53 is located on the corresponding first conductive member 31, and the second connecting member 541 of the second connecting unit 54 is located on the corresponding second conductive member 41. Finally, the housing 6 covers the protection device 5 and the fixing unit 7 is used to lock the housing 61 on the motherboard 1, so that the pressing member 62 presses the first connecting member 531 and the second connecting member 541 toward the motherboard 1, and the contact units 55 corresponding to the first connecting member 531 and the second connecting member 541 are in contact with the corresponding first conductive member 31 and the second conductive member 41 to form an electrical path. In this embodiment, the first connecting member 531 and the second connecting member 541 are conductive and elastic metal materials, such as: for convenience of drawing and description, please refer to fig. 2, which is a schematic diagram of the protection device 5 and the housing 6 turned over to the reverse side after the protection device 5 and the housing 6 are turned over, the contact units 55 are respectively metal bumps integrally formed with the first connecting member 531 and the second connecting member 541, and the pressing member 62 is a convex pillar, so that when the pressing member 62 presses the first connecting member 531 and the second connecting member 541 toward the motherboard 1, the first connecting member 531 and the second connecting member 541 deform to make the corresponding contact unit 55 contact with the corresponding first conductive member 31 and the corresponding second conductive member 41 to form an electrical path, but not limited thereto.
Referring to fig. 1, 2 and 3, in use, the processor 21 of the control unit 2 sends out a detection command, and the first conductive unit 3 generates a recovery command through the first connection unit 53 and the detection circuit layer 52, and the recovery command is transmitted back to the control unit 2 through the second connection unit 54 to the second conductive unit 4. It should be noted that the detection command has two sets of detection bit information, one set of detection bit information of the detection command is generated by one of the first conductive members 31 of the first conductive unit 3 through one of the first connecting members 531 of the first connecting unit 53, and through the first detection circuit 521 of the detection circuit layer 52, one set of recovery bit information of the recovery command is generated. The other set of detection bit information of the detection command is generated from the other first conductive member 31 of the first conductive unit 3, through the other first connection member 531 of the first connection unit 53, and through the second detection circuit 522 of the detection circuit layer 52. In the embodiment, the processor 21 simultaneously sends the two sets of detection bit information, but not limited thereto, and may also send one set of detection bit information first and then send the other set of detection bit information, so as to design different detection mechanisms according to practical considerations. In addition, in the embodiment, the detection circuit layer 52 is a multi-layer composite circuit, the first detection circuit 521 is one layer of circuit, and the second detection circuit 522 is another layer of circuit, but not limited thereto, the first detection circuit 521 and the second detection circuit 522 may be located in the same layer of circuit and are independent circuits.
When the processor 21 of the control unit 2 determines that any one set of recovery bit information of the received recovery command is different from the corresponding set of detection bit information, the processor 21 executes the data protection mode to the data protector 22 to delete the confidential data inside the data protector 22, and the processor 21 does not execute the externally input command. For example, a set of detection bit information of the detection instruction is (10) and the set of recovery bit information generated after passing through the first detection circuit 521 of the detection circuit layer 52 is (10), indicating that the loop between the processor 21 and the first detection circuit 521 is normal. Another set of detection bit information (11) passes through the second detection circuit 522 of the detection circuit layer 52 to generate the set of recovery bit information (01), which indicates that the loop connection between the processor 21 and the second detection circuit 522 is abnormal, and the second detection circuit 522 may be damaged by external intrusion, so that the set of recovery bit information (01) is different from the corresponding set of detection bit information (11), at this time, the processor 21 executes the data protection mode to delete the confidential data inside the data protector 22, thereby avoiding theft, and the processor 21 cannot execute an externally input instruction, thereby preventing the confidential data such as a password currently input by a user from being stolen, thereby achieving the protection effects of protecting the data protector 22 and preventing the confidential data from leaking.
Through the design that the pressing pieces 62 of the housing 6 respectively press the first connecting unit 53 and the second connecting unit 54 of the protection device 5, it is ensured that the first connecting unit 53, the second connecting unit 54 and the corresponding contact unit 55 are in contact with the corresponding first conductive unit 3 and the corresponding second conductive unit 4 to form an electric path. Furthermore, the processor 21 of the control unit 2 generates the reply instruction after sending the detection instruction through the detection circuit layer 52, and sends the reply instruction back to the processor 21 so as to determine whether the detection instruction is damaged or not and prevent the internal confidential data from being stolen.
It should be noted that the processor 21 of the control unit 2 has a transmission time, and when the time difference between the set of detection bit information sent by the processor 21 of the control unit 2 and the set of recovery bit information received by the processor 21 is different from the transmission time, the processor 21 executes the data protection mode to the data protector 22. For example, the first detection circuit 521 and the second detection circuit 522 have been tampered by external bridges and can make the sets of detection bit information sent by the processor 21 and the sets of recovery bit information received identical, and the processor 21 further determines whether the time difference between the sent sets of detection bit information and the sets of recovery bit information received is identical to the transmission time. If the difference indicates that the first detection circuit 521 or the second detection circuit 522 may have been changed due to external bridging, the processor 21 then executes the data protection mode to the data protector 22 for protection. In this embodiment, the transmission time has an upper limit and a lower limit, and as long as the time difference between the time of the set of detection bit information sent by the processor 21 and the time of the set of recovery bit information received exceeds the upper limit or is less than the lower limit, the processor 21 executes the data protection mode in real time to the data protector 22 for protection, but not limited to this, the transmission time can be determined according to actual use requirements.
In summary, in the electronic device with data protection function of the present invention, the pressing element 62 of the housing 6 respectively presses the first connecting unit 53 and the second connecting unit 54 of the protection apparatus 5, so as to ensure that the first connecting unit 53, the second connecting unit 54 and the corresponding contact unit 55 are stably contacted with the corresponding first conductive unit 3 and the corresponding second conductive unit 4 to form an electrical path, thereby achieving the objective of the present invention.
The detailed description and examples of the present invention are given above with reference to the accompanying drawings, but the scope of the present invention is not limited thereto, and the equivalent modifications and variations within the scope of the claims of the present invention should be considered as falling within the scope of the present invention.
Claims (10)
1. An electronic device with data protection function, characterized in that: comprises the following steps:
a main board;
a control unit arranged on the mainboard;
the two first conductive units and the second conductive units are respectively arranged on the mainboard and are respectively electrically connected with the control unit;
the protection device is arranged on the mainboard and covers the control unit, and comprises a protection body covering the control unit, two first connecting units and two second connecting units which are respectively arranged on the protection body, and a plurality of contact units arranged on the first connecting units and the second connecting units, wherein the protection body is provided with a detection circuit layer; and
the shell is arranged on the mainboard and covers the protection device, and comprises a shell body and a plurality of pressing parts which are arranged on the shell body and are positioned in the shell body and extend towards the direction of the protection device, wherein the pressing parts respectively correspond to the first connecting unit and the second connecting unit and are respectively used for pressing the first connecting unit and the second connecting unit, the contact units corresponding to the first connecting unit and the second connecting unit are respectively contacted with the corresponding first conducting unit and the second conducting unit, the control unit sends out a detection instruction, the first conducting unit generates a return instruction after passing through the detection circuit layer through the first connecting unit and returns the return instruction to the control unit through the second connecting unit, and when the return instruction received by the control unit is different from the detection instruction, the control unit executes a data protection mode to protect internal data.
2. The electronic device with data protection function as claimed in claim 1, wherein: the first connecting unit of the protection device is provided with two first connecting pieces penetrating through the protection body, the second connecting unit is provided with two second connecting pieces penetrating through the protection body, the first conductive unit is provided with two first conductive pieces corresponding to the first connecting pieces, the second conductive unit is provided with two second conductive pieces corresponding to the second connecting pieces, the first connecting pieces and the second connecting pieces are respectively and electrically connected with the detection circuit layer, the first connecting pieces are respectively connected and correspond to the second connecting pieces through being connected with the detection circuit layer, the contact units are respectively arranged on the first connecting pieces and the second connecting pieces, and the abutting pieces are used for abutting against the first connecting pieces and the second connecting pieces and enabling the contact units corresponding to the first connecting pieces and the second connecting pieces to be respectively contacted with the corresponding first conductive pieces and the second conductive pieces.
3. The electronic device with data protection function as claimed in claim 2, wherein: the detection circuit layer of the protection body is provided with a first detection circuit and a second detection circuit, wherein one first connecting piece of the first connecting unit is electrically connected with the first detection circuit and is connected with one second connecting piece corresponding to the second connecting unit through the first detection circuit, and the other first connecting piece of the first connecting unit is electrically connected with the second detection circuit and is connected with the other second connecting piece corresponding to the second connecting unit through the second detection circuit.
4. The electronic device with data protection function as claimed in claim 3, wherein: the control unit comprises a processor and a data protector connected with the processor, the processor sends the detection instruction and receives the recovery instruction, the detection instruction has two groups of detection bit information, one group of detection bit information of the detection instruction passes through one first connecting piece of the first connecting unit from one first conductive piece of the first conductive unit and generates one group of recovery bit information of the recovery instruction after passing through a first detection circuit of the detection circuit layer, the other group of detection bit information of the detection instruction passes through the other first connecting piece of the first connecting unit from the other first conductive piece of the first conductive unit and generates the other group of recovery bit information of the recovery instruction after passing through a second detection circuit of the detection circuit layer, when any group of recovery bit information of the recovery instruction received by the processor of the control unit is different from the corresponding group of detection bit information, the processor executes the data protection mode to protect the data protector.
5. The electronic device with data protection function as claimed in claim 4, wherein: the processor of the control unit has a transmission time, and when the time difference between the set of detection bit information corresponding to the detection instruction sent by the processor and the set of recovery bit information corresponding to the received recovery instruction is different from the transmission time, the processor executes the data protection mode to protect the data protector.
6. The electronic device with data protection function as claimed in claim 5, wherein: the transmission time has an upper limit value and a lower limit value, and when the time difference between the set of detection bit information corresponding to the detection instruction sent by the processor and the set of recovery bit information corresponding to the received detection instruction is greater than the upper limit value and less than the lower limit value, the processor executes the data protection mode to protect the data protector.
7. The electronic device with data protection function as claimed in claim 5, wherein: the fixing unit is used for locking the shell of the shell on the mainboard, and the pressing piece presses the first connecting piece and the second connecting piece so as to enable the contact units corresponding to the first connecting piece and the second connecting piece to be in contact with the corresponding first conductive piece and the second conductive piece.
8. The electronic device with data protection function as claimed in claim 5, wherein: the first connecting piece and the second connecting piece of the protection device are metal sheets penetrating through the protection body, and the contact units are metal bumps respectively arranged on the first connecting piece and the second connecting piece.
9. The electronic device with data protection function as claimed in claim 8, wherein: the first and second connectors of the protector are integrally formed with the corresponding contact units.
10. The electronic device with data protection function as claimed in claim 7, wherein: the pressing piece of the shell is a convex column which is arranged in the shell and extends towards the direction of the protection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611109148.4A CN108154049B (en) | 2016-12-06 | 2016-12-06 | Electronic equipment with data protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611109148.4A CN108154049B (en) | 2016-12-06 | 2016-12-06 | Electronic equipment with data protection function |
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| Publication Number | Publication Date |
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| CN108154049A CN108154049A (en) | 2018-06-12 |
| CN108154049B true CN108154049B (en) | 2021-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611109148.4A Expired - Fee Related CN108154049B (en) | 2016-12-06 | 2016-12-06 | Electronic equipment with data protection function |
Country Status (1)
| Country | Link |
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| CN (1) | CN108154049B (en) |
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| CN108154049A (en) | 2018-06-12 |
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