CN103902936A - Data protection device of terminal equipment - Google Patents
Data protection device of terminal equipment Download PDFInfo
- Publication number
- CN103902936A CN103902936A CN201410131888.2A CN201410131888A CN103902936A CN 103902936 A CN103902936 A CN 103902936A CN 201410131888 A CN201410131888 A CN 201410131888A CN 103902936 A CN103902936 A CN 103902936A
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- chip microcomputer
- reflective photoelectric
- shell
- self
- switch
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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
- G06F21/86—Secure or tamper-resistant housings
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Software Systems (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Electronic Switches (AREA)
Abstract
The invention discloses a data protection device of terminal equipment. The data protection device of terminal equipment comprises a self-reset switch, a reflective photoelectric switch and a single-chip microcomputer. The self-reset switch is abutted against a shell of the terminal equipment to be kept in a triggered state under abutting pressure of the shell and outputs an electric signal. The reflective photoelectric switch is arranged in the shell of the terminal equipment, a light ray signal sent by a transmitter of the reflective photoelectric switch is reflected by the shell and the received by a receiver, and the reflective photoelectric switch is kept in a triggered state and outputs an electric signal. The single-chip microcomputer is respectively connected with the self-reset switch and the reflective photoelectric switch to detect the electric signals outputted by the self-reset switch and the reflective photoelectric switch and clear application data when one of the two electric signals leaps, and accordingly dual protection of data in the terminal equipment is realized, data theft is effectively avoided on the basis that a shell material is unchanged, and increasing of production cost and processing cost is avoided.
Description
Technical field
The present invention relates to terminal device, relate in particular to a kind of terminal data protection device.
Background technology
Along with developing rapidly of infotech, the application of individual payment terminal and financial consumption POS machine is more and more extensive.In this context, the data security of terminal device seems very important.So just require needs to have better safety guarantee on the hardware of terminal device; the equipment that prevents is torn open machine by force; existing terminal device be the wiring board with data processing and data storage function is fixed on to shell within; when stealing that data person takes whole shell apart or by modes such as cuttings during in shell upper shed; external unit can be connected to wiring board; thereby the data in terminal device are stolen out; data security is threatened; therefore, the data protection poor-performing of this terminal device.Existing terminal device is mostly plastic casing, prevents from tearing open by force machine if shell is used special material instead, bring cost high, be difficult to the problems such as processing.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of with low cost can effectively prevent the terminal data protection device that data are stolen.
For solving the problems of the technologies described above, the present invention adopts following technical scheme.
A kind of terminal data protection device, it includes: a self-resetting switch, self-resetting switch is connected to the shell of terminal device and makes reset switch remain on triggering state by compressing of shell, and output electrical signals; One reflective photoelectric switch, within reflective photoelectric switch is located at the shell of terminal device, the light signal that its transmitter sends by its receiver is received, makes reflective photoelectric switch remain on triggering state after the reflection of shell, and output electrical signals; One single-chip microcomputer, it is connected with self-resetting switch and reflective photoelectric switch respectively, to detect the electric signal of both output, and in the time that saltus step occurs one of two electric signal, removes application data.
Preferably, between single-chip microcomputer and power end VCC, have access to one second diode, the anodic bonding power end VCC of the second diode, its negative electrode connects the feeder ear VBAT of single-chip microcomputer.
Preferably, also include a button cell, the two ends of self-resetting switch connect respectively the positive pole of button cell and the intrusion detection pin TAMPER of single-chip microcomputer.
Preferably, also include the first diode, the positive pole of the anodic bonding button cell of the first diode, its negative electrode connects the feeder ear VBAT of single-chip microcomputer.
Preferably, the tie point of single-chip microcomputer and reflective photoelectric switch is by the second resistance and the second capacity earth parallel with one another.
Preferably, the tie point of single-chip microcomputer and self-resetting switch is by the first resistance and the first capacity earth parallel with one another.
Preferably, single-chip microcomputer is STM32 single-chip microcomputer.
The present invention's beneficial effect is compared to existing technologies: single-chip microcomputer receives one of two path signal that self-resetting switch and reflective photoelectric switch send and just removes application data; the data of terminal device inside are protected; do not changing on the basis of enclosure material; effectively avoid data stolen, and avoided increase cost of products and processing cost.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present invention.
Fig. 2 is the position relationship schematic diagram of reflective photoelectric switch and terminal device shell.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in more detail.
The invention discloses a kind of terminal data protection device, shown in Fig. 1 and Fig. 2, it includes a self-resetting switch S1, a reflective photoelectric switch 2 and a single-chip microcomputer 1, wherein:
Self-resetting switch S1 is connected to the shell 3 of terminal device and makes reset switch remain on triggering state by compressing of shell 3, and output electrical signals is to single-chip microcomputer 1, within reflective photoelectric switch 2 is located at the shell 3 of terminal device, the light signal that its transmitter sends after the reflection of shell 3 by its receiver is received, make reflective photoelectric switch 2 remain on triggering state, and output electrical signals is to single-chip microcomputer 1, it is connected single-chip microcomputer 1 with self-resetting switch S1 and reflective photoelectric switch 2 respectively, to detect the electric signal of both output, and there is to remove when saltus step application data at one of two electric signal, in the present embodiment, single-chip microcomputer 1 is STM32 single-chip microcomputer preferably.
Above-mentioned terminal data protection device; realize the duplicate protection to terminal device internal data by self-resetting switch S1 and reflective photoelectric switch 2; successfully manage that shell 3 is opened by entirety or locally open the threat being brought; do not changing on the basis of shell 3 materials, effectively avoiding data stolen.
Further, one end of reflective photoelectric switch 2 connects power end VCC, the other end of this reflective photoelectric switch 2 connects the IO mouth PC1 of single-chip microcomputer 1, wherein, in the time that reflective photoelectric switch 2 is blocked by shell 3, reflective photoelectric switch 2 closures, and the high level signal of power end VCC is transferred to the IO mouth PC1 of single-chip microcomputer 1, in the time stealing data person in shell 3 upper shed, because reflective photoelectric switch 2 has lacked reflecting surface in off-state, the IO mouth PC1 of single-chip microcomputer 1 produces low level signal, single-chip microcomputer 1 is changed the application data of terminal device inside is removed to processing by the height of this level, and send alarm, the data of terminal device inside are protected, effectively avoid stolen because taking the data that part shell 3 causes apart.
In the present embodiment, this terminal device also includes button cell BT, the two ends of self-resetting switch S1 connect respectively the positive pole of button cell BT and the intrusion detection pin TAMPER of single-chip microcomputer 1, this button cell BT is as reserve battery, when self-resetting switch S1 is closed by the electric signal transmission of this button cell BT positive pole to single-chip microcomputer 1.When assembling terminal device, push self-resetting switch S1 with shell 3, make self-resetting switch S1 closure, simultaneously, this self-resetting switch S1 transfers to the anodal high level signal of button cell BT the intrusion detection pin TAMPER of single-chip microcomputer 1, and in the time that shell 3 is taken apart by entirety, self-resetting switch S1 disconnects, intrusion detection pin TAMPER produces low level, and single-chip microcomputer 1 can be removed application data in time.
As a kind of optimal way, this terminal device also includes the first diode D1, the positive pole of the anodic bonding button cell BT of the first diode D1, the negative electrode of this first diode D1 connects the feeder ear VBAT of single-chip microcomputer 1, this first diode D1, in the time that self-resetting switch S1 disconnects, avoids the voltage at feeder ear VBAT place to pour in down a chimney to button cell BT.
As a kind of optimal way, between single-chip microcomputer and power end VCC, have access to one second diode D2, the anodic bonding power end VCC of the second diode D2, its negative electrode connects the feeder ear VBAT of single-chip microcomputer 1, this second diode D2, in the time that reflective photoelectric switch 2 disconnects, avoids the voltage at feeder ear VBAT place to pour in down a chimney to power end VCC.
For fear of maloperation, single-chip microcomputer 1 is with the tie point of reflective photoelectric switch 2 by the second resistance R 2 parallel with one another and the second capacitor C 2 ground connection, and the tie point of single-chip microcomputer 1 and self-resetting switch S1 is by the first resistance R 1 parallel with one another and the first capacitor C 1 ground connection.Be subject to the impact of the instantaneous factors such as power supply ripple, in the time of the IO of single-chip microcomputer 1 mouth PC1 and intrusion detection pin TAMPER place generation short time skip signal, can extend this skip signal by the first capacitor C 1 and the second capacitor C 2 and reach the time of trigger voltage, and can adjust by changing the parameter value of resistance and electric capacity the time value of this prolongation.
In terminal data protection device disclosed by the invention, in the time that shell 3 is taken apart by entirety, self-resetting switch S1 disconnects, the intrusion detection pin TAMPER of single-chip microcomputer 1 produces low level, remove processing to make the timely application data of single-chip microcomputer 1, in the time stealing data person in shell 3 upper shed, reflective photoelectric switch 2 disconnects because lacking reflecting surface, the IO mouth PC1 of single-chip microcomputer 1 produces low level signal, single-chip microcomputer 1 is changed the application data of terminal device inside is removed to processing by the height of this level, the data of terminal device inside are protected, the present invention is not changing on the basis of shell 3 materials, effectively avoid stolen because taking the data that part shell 3 causes apart, and increase cost of products and processing cost are avoided, in addition, under the acting in conjunction of this self-resetting switch S1 and reflective photoelectric switch 2, the application data of terminal device has obtained duplicate protection, data security further improves.
More than preferred embodiment of the present invention just, is not limited to the present invention, all amendments of making in technical scope of the present invention, is equal to and replaces or improvement etc., all should be included in the scope that the present invention protects.
Claims (7)
1. a terminal data protection device, is characterized in that including:
One self-resetting switch, described self-resetting switch is connected to the shell of terminal device and makes described reset switch remain on triggering state by compressing of described shell, and output electrical signals;
One reflective photoelectric switch, within described reflective photoelectric switch is located at the shell of terminal device, the light signal that its transmitter sends by its receiver is received, makes described reflective photoelectric switch remain on triggering state after the reflection of described shell, and output electrical signals;
One single-chip microcomputer, it is connected with described self-resetting switch and reflective photoelectric switch respectively, to detect the electric signal of both output, and in the time that saltus step occurs one of two electric signal, removes application data.
2. terminal data protection device as claimed in claim 1; it is characterized in that; between described single-chip microcomputer and power end VCC, have access to one second diode, the anodic bonding power end VCC of described the second diode, its negative electrode connects the feeder ear VBAT of single-chip microcomputer.
3. terminal data protection device as claimed in claim 1, is characterized in that, also includes a button cell, and the two ends of described self-resetting switch connect respectively the positive pole of button cell and the intrusion detection pin TAMPER of single-chip microcomputer.
4. terminal data protection device as claimed in claim 3, is characterized in that, also includes the first diode, the positive pole of the anodic bonding button cell of described the first diode, and its negative electrode connects the feeder ear VBAT of single-chip microcomputer.
5. the terminal data protection device as described in as arbitrary in claim 1 to 4, is characterized in that, the tie point of described single-chip microcomputer and reflective photoelectric switch is by the second resistance and the second capacity earth parallel with one another.
6. the terminal data protection device as described in claim 3 or 4, is characterized in that, the tie point of described single-chip microcomputer and self-resetting switch is by the first resistance and the first capacity earth parallel with one another.
7. the terminal data protection device as described in as arbitrary in claim 1 to 4, is characterized in that, described single-chip microcomputer is STM32 single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410131888.2A CN103902936A (en) | 2014-04-02 | 2014-04-02 | Data protection device of terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410131888.2A CN103902936A (en) | 2014-04-02 | 2014-04-02 | Data protection device of terminal equipment |
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| Publication Number | Publication Date |
|---|---|
| CN103902936A true CN103902936A (en) | 2014-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410131888.2A Pending CN103902936A (en) | 2014-04-02 | 2014-04-02 | Data protection device of terminal equipment |
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| CN (1) | CN103902936A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110823277A (en) * | 2018-08-07 | 2020-02-21 | 中惠创智无线供电技术有限公司 | Equipment anti-dismounting device and equipment with anti-dismounting function |
| CN111753341A (en) * | 2020-06-29 | 2020-10-09 | 广州邦讯信息系统有限公司 | Illegal disassembly detection method for Internet of things equipment |
-
2014
- 2014-04-02 CN CN201410131888.2A patent/CN103902936A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110823277A (en) * | 2018-08-07 | 2020-02-21 | 中惠创智无线供电技术有限公司 | Equipment anti-dismounting device and equipment with anti-dismounting function |
| CN110823277B (en) * | 2018-08-07 | 2021-12-17 | 中惠创智（深圳）无线供电技术有限公司 | Equipment anti-dismounting device and equipment with anti-dismounting function |
| CN111753341A (en) * | 2020-06-29 | 2020-10-09 | 广州邦讯信息系统有限公司 | Illegal disassembly detection method for Internet of things equipment |
| CN111753341B (en) * | 2020-06-29 | 2023-09-22 | 广州邦讯信息系统有限公司 | Illegal disassembly detection method for Internet of things equipment |
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Address after: Longgang District of Shenzhen City, Guangdong province 518000 Dragon Street Longgang Tianan cyber Park 4 Building A block 16 layer Applicant after: GUANGDONG HUADA INTEGRATION TECHNOLOGY CO., LTD. Address before: Longgang District of Shenzhen City, Guangdong province 518000 Dragon Street Longgang Tianan cyber Park 4 Building A block 16 layer Applicant before: Guangdong Huada Integration Technology Co., Ltd. |
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Application publication date: 20140702 |