CN105930747A - Electronic device and protection method for electronic device - Google Patents
Electronic device and protection method for electronic device Download PDFInfo
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- CN105930747A CN105930747A CN201510516190.7A CN201510516190A CN105930747A CN 105930747 A CN105930747 A CN 105930747A CN 201510516190 A CN201510516190 A CN 201510516190A CN 105930747 A CN105930747 A CN 105930747A
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- carbon film
- resistance value
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- electronic equipment
- control chip
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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
- G06F21/82—Protecting input, output or interconnection devices
- G06F21/83—Protecting input, output or interconnection devices input devices, e.g. keyboards, mice or controllers thereof
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- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
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- Storage Device Security (AREA)
Abstract
The invention provides an electronic device and a protection method for an electronic device. The electronic device includes a cover member, a circuit board and a main control chip. The cover member fits the circuit board. Two contacts are disposed on the inner surface of the circuit board. A carbon film is disposed on the inner surface of the cover member. The carbon film contacts with the two contacts, and communicates the two contacts. The main control chip is connected between the two contacts. The main control chip is used for detecting a resistance valve between the two contacts and recording and saving the resistance valve. When a variation in the resistance valve between the two contacts is detected, the state of the main control chip is set as unavailable. The invention can overcome the problems in a conventional device that even if a conductive rubber is uncovered, a temper detection circuit will not break to trigger a protection mechanism, so an attacker is allowed to steal sensitive data information easily, and the security of the electronic device is improved, that is, once the attacker disassembles the machine, the machine will not work and be destroyed.
Description
Technical field
The present invention relates to a kind of electronic technology field, particularly relate to the guard method of a kind of electronic equipment and electronic equipment.
Background technology
At current electronics field, such as POS, code keypad, ATM, electronic signature equipment, OTP and its
Electronic equipment in his financial field, system sensitive data message is as the keyboard signal part of input personal identification number, deposited and be
The system safety chip of key, self-destruction attack detecting signal etc., be required for by strict protection.
In correlation technique, substantially on keyboard pcb board, it is provided with multiple connection protection for sensitive data information protection and walks
The tamper-evident contact of line, conductive rubber is pressed on tamper-evident contact by machine shell, makes tamper-evident testing circuit turn on.If assailant
Attempt full wafer open machine shell carry out attack keyboard time, conductive rubber just unclamps with tamper-evident contact, cause tamper-evident testing circuit break
Road etc., thus trigger the related mechanism sensitive data information with erasing main frame, such sensitive data information has just obtained effective guarantor
Protect.But in the program, if assailant uses certain mode to be held on by tamper-evident testing circuit in advance, even if rubber will be conducted electricity
Glue is opened, and tamper-evident testing circuit also will not open circuit, it is impossible to trigger protection mechanism so that assailant can gently steal sensitive data letter
Breath, therefore, the safety of the program is the highest.
Summary of the invention
Present invention seek to address that one of the problems referred to above.
A kind of electronic equipment of offer is provided.
Another object of the present invention is to provide the guard method of a kind of electronic equipment.
For reaching above-mentioned purpose, technical scheme is specifically achieved in that
One aspect of the present invention provides a kind of electronic equipment, and described electronic equipment includes: covering, circuit board and main control chip,
Wherein: described covering fits together with described circuit board；Two contacts it are provided with on the inner surface of described circuit board, described
It is provided with carbon film, described carbon film and said two contact on the inner surface of covering, and connects said two contact；Described
Main control chip is connected between said two contact, described main control chip, for detecting the resistance value between said two contact,
And record the described resistance value of preservation；When the resistance value detected between said two contact changes, put described main control chip
State be unavailable.
Additionally, described carbon film is distributed on subregion or the Zone Full of the inner surface of described covering.
Another aspect of the present invention provides a kind of electronic equipment, and described electronic equipment includes: circuit board, be located on described circuit board
Main control chip；It is provided with two contacts on described circuit board, and is coated with carbon film, described carbon film and said two contact,
And connect said two contact；Described main control chip is connected between said two contact, and described main control chip is used for detecting described
Resistance value between two contacts, and record the described resistance value of preservation；When the resistance value detected between said two contact occurs
During change, the state putting described main control chip is unavailable.
Additionally, be also covered with covering on described carbon film, described covering is together with described carbon film, described press fit of circuit boards.
Additionally, described carbon film is distributed on subregion or the Zone Full of described circuit board.
Additionally, described covering is metal clips conducting film.
Additionally, described carbon film includes: bar shaped carbon film, circular carbon film, square carbon film, linear carbon film or irregularly shaped carbon film.
Additionally, the resistance value between said two contact determines according to the carbon capacity of described carbon film unit volume.
Additionally, described main control chip, for detecting that the resistance value between said two contact changes, including:
Detect that the resistance value between presently described two contacts is more than preset resistive value with the difference recording the resistance value preserved.
Additionally, described main control chip is safety chip.
Additionally, described electronic equipment includes: electronic signature equipment, smart card, card reader, dynamic password generating device, sale
Terminal POS machine or described electronic signature equipment, smart card, dynamic password generating device are arbitrarily combined the equipment formed.
Another aspect of the present invention provides a kind of guard method applying above-mentioned electronic equipment, and described method includes:
Resistance value between detection said two contact, and record the described resistance value of preservation；
When the resistance value detected between said two contact changes, the state of the main control chip putting described electronic equipment is
Unavailable.
Detect described in additionally, that the resistance value between said two contact changes, including:
Detect that the resistance value between presently described two contacts is more than preset resistive value with the difference recording the resistance value preserved.
As seen from the above technical solution provided by the invention, the invention provides the protection of a kind of electronic equipment and electronic equipment
Method, opens conductive rubber even if can overcome in existing equipment, and tamper-evident testing circuit also will not open circuit, it is impossible to trigger protection
Mechanism so that assailant can gently steal the problem of sensitive data information, improves the safety of electronic equipment, i.e. assailant one
Denier tears machine open, and machine does not the most work destroyed.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, the required accompanying drawing used in embodiment being described below
It is briefly described, it should be apparent that, the accompanying drawing in describing below is only some embodiments of the present invention, for this area
From the point of view of those of ordinary skill, on the premise of not paying creative work, it is also possible to obtain other accompanying drawings according to these accompanying drawings.
The structural representation of the electronic equipment that Fig. 1 provides for the embodiment of the present invention 1；
Fig. 2 is the schematic diagram being provided with carbon film 400 on the inner surface of covering 100；
The structural representation of the electronic equipment that Fig. 3 provides for the embodiment of the present invention 2；
Fig. 4 is the schematic diagram after carbon film 400 is fitted with circuit board 200；
The structural representation of the electronic equipment that Fig. 5 provides for the embodiment of the present invention 2；
The flow chart of the guard method of the electronic equipment in the Application Example 1 to 2 that Fig. 6 provides for the embodiment of the present invention 3.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Reality based on the present invention
Execute example, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into
Protection scope of the present invention.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " on ", D score, " front ",
Orientation or the position relationship of the instruction such as " afterwards ", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward " are base
In orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description rather than instruction or hint institute
The device that refers to or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the present invention
Restriction.Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or quantity or position.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " install ", " being connected ",
" connect " and should be interpreted broadly, connect for example, it may be fixing, it is also possible to be to removably connect, or be integrally connected；Permissible
It is to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of individual element internal.For the ordinary skill in the art, can understand that above-mentioned term is in the present invention with concrete condition
In concrete meaning.
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in further detail.
Embodiment 1
Present embodiments provide a kind of electronic equipment.
The structural representation of the electronic equipment that Fig. 1 provides for the present embodiment, as it is shown in figure 1, this electronic equipment 10 includes: cover
Part 100 and circuit board 200；Covering 100 fits together with circuit board 200；It is provided with on the inner surface of circuit board 200
Two contacts 301 and 302, the inner surface of covering 100 is provided with carbon film 400 (as shown in Figure 2), and carbon film and two touch
Point cantact, and connect two contacts.Electronic equipment 10 also includes that main control chip 500, main control chip 500 are connected to two contacts
Between 301 and 302, main control chip 500, the resistance value between two contacts of detection, and record preservation resistance value；Work as inspection
Measuring the resistance value between two contacts when changing, the state putting main control chip is unavailable.
As the optional embodiment of the one in the present embodiment, covering 100 is that metal clips conducting film, i.e. technical staff are usual
Described DOME film.In the present embodiment, inner surface refers to when covering 100 and circuit board 200 fit together, covering
The inner surface of 100 is exactly the surface towards circuit board 200, and the inner surface of circuit board 200 is exactly the surface towards covering 100.
Thus, when covering 100 fits together with circuit board 200, two contacts can be connected by carbon film, when covering 100
When separating with circuit board 200, carbon film can be caused to rupture, and then affect the resistance between two contacts, trigger protection mechanism, and then
Carry out anti-demolition protection.
Fig. 2 is the schematic diagram being provided with carbon film 400 on the inner surface of covering 100.As the optional reality of the one in the present embodiment
Executing mode, carbon film 400 is distributed on subregion or the Zone Full of the inner surface of covering 100.Such as, carbon film can be
Thin layer is coated on the whole inner surface of covering 100, naturally it is also possible to have certain thickness；Can also simply be coated in when covering
Cover piece 100 and circuit board 200 can cover the regional area of two contacts when fitting.Carbon film is can cover two contacts
Scope is minimum distribution, and border less in covering 100 and circuit board 200 is for maximum distribution scope.Carbon film is permissible
It is to be coated with on the inner surface of covering 100, it is also possible to for independent pad pasting, fit on the inner surface of covering 100, only
Wanting can be fixed on the inner surface of covering 100, the present embodiment is not particularly limited.Owing to carbon film has electric conductivity,
Therefore, two contacts can be connected by carbon film, and meanwhile, carbon film is also fragile, and the covering being fitted with carbon film is once taken off
Opening, carbon film also will be destroyed, and the resistance between two contacts then changes, and then trigger protection mechanism, carries out anti-demolition
Protection.
Additionally, carbon film 400 can occur with various forms, such as, carbon film 400 may include that bar shaped carbon film, circular carbon film,
Square carbon film, linear carbon film or irregularly shaped carbon film.What deserves to be explained is, when carbon film 400 is linear carbon film, can simply be
Loop wire shape is distributed on the inner surface of covering 100, now, when covering 100 is fitted with circuit board 200, and the two of loop wire
End at least will be with two contact, and the carbon film of other shapes the most at least to cover two contacts.
As the optional embodiment of the one in the present embodiment, main control chip 500 can be safety chip.This safety chip (as
The Z8D64U (state close lot number SSX43) of Guoming Technology Co., Ltd, Z32 (state close lot number SSX20)) internal have solely
Vertical processor and memory element, can store PKI digital certificate and key, and other characteristics, data are added solution
Close computing, provides the user data encryption and identification safety authentication service, protection business privacy and data safety.Main control chip can
With the resistance value between two contacts 301 and 302 of detection, the resistance value between two contacts is covering 100 and circuit board
The resistance value of covering carbon film on two contacts during 200 laminating, the resistance value between two contacts is according to carbon film unit volume
Carbon capacity determines.Therefore, under normal operating conditions, the resistance value between two contacts is no variation in, it is simply that electronics sets
Standby in factory by after shell pressing well, cover carbon film on two contacts when covering 100 and circuit board 200 are fitted
Resistance value, certainly, owing to the shape of carbon film, thin and thick, volume vary in size, the resistance value of carbon film itself can difference, this makes
In each electronic equipment between two contacts resistance value can resistance be different according to the difference of plant produced.Therefore, in normal work
Under state, the resistance value record between two contacts that main control chip first will detect preserves.But, if assailant to open
Carbon film or be only merely and tear sub-fraction carbon film, because carbon film fragility can occur fracture or comes off, now, carbon film unit volume
Carbon capacity will change, thus, main control chip just can detect that the resistance value of the carbon film on two contacts changes,
And then anti-demolition protection can be carried out with trigger protection mechanism, the state of the main control chip i.e. putting electronic equipment is unavailable, can not
With i.e. referring to that safety chip can not work, be equivalent to cancel, it is impossible to be read and can not input, forbid distorting password, erasing master control
The key message of chip-stored and key etc., thus by change in resistance trigger protection mechanism, overcoming conductive rubber opens, anti-
Taking off testing circuit also will not open circuit, it is impossible to trigger protection mechanism so that the problem that assailant can gently steal sensitive data information.
Because, even if assailant can use certain mode to be held on by tamper-evident testing circuit in advance, the resistance that main control chip detects
Value still can change.
In the specific implementation, if assailant's carbon film to be opened or be only merely and tear sub-fraction carbon film, crisp due to carbon film
Weak property, carbon film will be destroyed, and now, the carbon capacity of carbon film unit volume will change, and thus, main control chip is just
Can detect that the resistance value of the carbon film on two contacts changes, and then anti-demolition protection can be carried out with trigger protection mechanism,
Prevent assailant from gently stealing sensitive data information.
As the optional embodiment of the one in the present embodiment, main control chip 500, for detecting the resistance between two contacts
Value changes, including: detect that the resistance value between the first two contact is more than default with the difference of the resistance value of record preservation
Resistance.Wherein, preset resistive value can be arranged according to technical staff's experience, to prevent user's imprudence from being fallen on the ground by electronic equipment or touching
Hitting so that the carbon capacity of carbon film unit volume occurs small change, and then the least change in resistance detected, false triggering is protected
The situation of mechanism.
As the optional embodiment of the one in the present embodiment, electronic equipment 10 includes: the electronic signature equipment (U such as industrial and commercial bank
Shield, agricultural bank K precious etc.), smart card, card reader, dynamic password generating device (One-time Password is called for short OTP),
Point-of-sale terminal POS or above-mentioned electronic signature equipment, smart card, dynamic password generating device are arbitrarily combined formation
Equipment, belongs to the object of the protection of the present invention.
The electronic equipment provided by the present embodiment, is opened conductive rubber even if can overcome in existing equipment, tamper-evident detection electricity
Road also will not open circuit, it is impossible to trigger protection mechanism so that assailant can gently steal the problem of sensitive data information, improves electricity
Machine is once torn in the safety of subset, i.e. assailant open, and machine does not the most work destroyed.
Embodiment 2
Present embodiments provide a kind of electronic equipment.The structural representation of the electronic equipment that Fig. 3 provides for the present embodiment.Such as Fig. 3
Shown in, this electronic equipment 10 includes: circuit board 200 and set main control chip 500 on circuit boards；Arrange on circuit board 200
There are two contacts 301 and 302, and are coated with carbon film 400, carbon film 400 and two contact, and connect two contacts；Main
Control chip 500 is connected between two contacts 301 and 302, the resistance value between two contacts of detection, and records preservation
Resistance value；When the resistance value detected between two contacts 301 and 302 changes, the state putting main control chip 500 is
Unavailable.Fig. 4 is the schematic diagram after carbon film 400 is fitted with circuit board 200.
As the optional embodiment of the one in the present embodiment, as it is shown in figure 5, be also covered with covering 100 on carbon film 400,
Covering 100 presses together with carbon film 400, circuit board 200, thus, at covering 100, carbon film 400 and circuit board
200 when pressing together, and two contacts can be connected by carbon film, when assailant opens covering 100, and covering 100
Separate with circuit board 200, carbon film can be caused to rupture, and then affect the resistance between two contacts, trigger protection mechanism, Jin Erjin
Row anti-demolition protection.
As the optional embodiment of the one in the present embodiment, covering 100 is that metal clips conducting film, i.e. technical staff are usual
Described DOME film.
As the optional embodiment of the one in the present embodiment, carbon film 400 is distributed in the subregion of the inner surface of circuit board 200
Or on Zone Full.Such as, carbon film can be that thin layer is coated on circuit board 200, naturally it is also possible to has certain thickness；
Can also simply be coated in the regional area that can cover two contacts.Carbon film divides in the range of minimum can cover two contacts
Cloth scope, border less in covering 100 and circuit board 200 is for maximum distribution scope.Carbon film can be to be coated with in circuit
On plate 200, it is also possible to for independent pad pasting, fit on circuit board 200, as long as can be fixed on circuit board 200,
The present embodiment is not particularly limited.Owing to carbon film has electric conductivity, therefore, fit together with circuit board 200 when carbon film 400
Time, two contacts can be connected by carbon film, and meanwhile, carbon film is also fragile, and the covering being fitted with carbon film is once lifted,
Carbon film also will be destroyed, and the resistance between two contacts then changes, and then trigger protection mechanism, carries out anti-demolition protection.
Additionally, carbon film 400 can occur with various forms, such as, carbon film 400 may include that bar shaped carbon film, circular carbon film,
Square carbon film, linear carbon film or irregularly shaped carbon film.What deserves to be explained is, when carbon film 400 is linear carbon film, can simply be
Loop wire shape is distributed on circuit board 200, and now, the two ends of loop wire at least will be with two contact, and the carbon film of other shapes is such as
On at least to cover two contacts.
As the optional embodiment of the one in the present embodiment, main control chip 500 can be safety chip.This safety chip (as
The Z8D64U (state close lot number SSX43) of Guoming Technology Co., Ltd, Z32 (state close lot number SSX20)) internal have solely
Vertical processor and memory element, can store PKI digital certificate and key, and other characteristics, data are added solution
Close computing, provides the user data encryption and identification safety authentication service, protection business privacy and data safety.Main control chip can
With the resistance value between two contacts 301 and 302 of detection, the resistance value between two contacts is carbon film 400 and circuit board 200
The resistance value of covering carbon film on two contacts during laminating, the resistance value between two contacts is held according to the carbon of carbon film unit volume
Amount determines.Therefore, under normal operating conditions, the resistance value between two contacts is no variation in, it is simply that electronic equipment exists
By after shell pressing well in factory, when carbon film 400 and circuit board 200 are fitted, cover the resistance value of carbon film on two contacts,
Certainly, owing to the shape of carbon film, thin and thick, volume vary in size, the resistance value of carbon film itself can difference, this makes each electronics
In equipment between two contacts resistance value can resistance be different according to the difference of plant produced.Therefore, in normal operation,
Resistance value record between two contacts that main control chip first will detect preserves.But, if assailant's carbon film to be opened or
Only it is merely and tears sub-fraction carbon film, because carbon film fragility can occur fracture or comes off, now, the carbon capacity of carbon film unit volume
Will change, thus, main control chip just can detect that the resistance value of the carbon film on two contacts changes, and then permissible
Trigger protection mechanism, carries out anti-demolition protection, and the state of the main control chip i.e. putting electronic equipment is unavailable, and unavailable i.e. finger is pacified
Full chip can not work, and is equivalent to cancel, it is impossible to be read and can not input, and forbids distorting password, erasing main control chip storage
Key message and key etc., thus by change in resistance trigger protection mechanism, overcoming conductive rubber opens, tamper-evident detection electricity
Road also will not open circuit, it is impossible to trigger protection mechanism so that the problem that assailant can gently steal sensitive data information.Because, i.e.
Enabling assailant to use certain mode to be held on by tamper-evident testing circuit in advance, the resistance that main control chip detects still can
Change.
In the specific implementation, if assailant's carbon film to be opened or be only merely and tear sub-fraction carbon film, crisp due to carbon film
Weak property, carbon film will be destroyed, and now, the carbon capacity of carbon film unit volume will change, and thus, main control chip is just
Can detect that the resistance value of the carbon film on two contacts changes, and then anti-demolition protection can be carried out with trigger protection mechanism,
Prevent assailant from gently stealing sensitive data information.
As the optional embodiment of the one in the present embodiment, main control chip 500, for detecting the resistance between two contacts
Value changes, including: detect that the resistance value between the first two contact is more than default with the difference of the resistance value of record preservation
Resistance.Wherein, preset resistive value can be arranged according to technical staff's experience, to prevent user's imprudence from being fallen on the ground by electronic equipment or touching
Hitting so that the carbon capacity of carbon film unit volume occurs small change, and then the least change in resistance detected, false triggering is protected
The situation of mechanism.
As the optional embodiment of the one in the present embodiment, electronic equipment 10 includes: the electronic signature equipment (U such as industrial and commercial bank
Shield, agricultural bank K precious etc.), smart card, card reader, dynamic password generating device (One-time Password is called for short OTP),
Point-of-sale terminal POS or above-mentioned electronic signature equipment, smart card, dynamic password generating device are arbitrarily combined formation
Equipment, belongs to the object of the protection of the present invention.
The electronic equipment provided by the present embodiment, is opened conductive rubber even if can overcome in existing equipment, tamper-evident detection electricity
Road also will not open circuit, it is impossible to trigger protection mechanism so that assailant can gently steal the problem of sensitive data information, improves electricity
Machine is once torn in the safety of subset, i.e. assailant open, and machine does not the most work destroyed.
Embodiment 3
According to embodiments of the present invention, it is provided that the guard method of a kind of electronic equipment applied in above-described embodiment 1 to 3.Such as figure
Shown in 6, the guard method of this electronic equipment comprises the following steps:
S401: detect the resistance value between two contacts, and record preservation resistance value；
S402: when the resistance value detected between two contacts changes, puts the state of main control chip of electronic equipment for not
Available.
As the optional embodiment of the one in the present embodiment, in step S401, such as the electronic equipment in embodiment 1 to 3
10 also include main control chip, and main control chip is connected between two contacts.Wherein, main control chip can be safety chip.Master control
Chip can detect the resistance value between two contacts, and the resistance value between two contacts is covering 100 and circuit board 200
The resistance value of covering carbon film on two contacts during laminating, the resistance value between two contacts is held according to the carbon of carbon film unit volume
Amount determines.Therefore, under normal operating conditions, the resistance value between two contacts is no variation in, it is simply that electronic equipment exists
By after shell pressing well in factory, when covering 100 and circuit board 200 are fitted, cover the resistance of carbon film on two contacts
Value, certainly, owing to the shape of carbon film, thin and thick, volume vary in size, the resistance value of carbon film itself can be different, and this makes each
In electronic equipment between two contacts resistance value can resistance be different according to the difference of plant produced.Therefore, in step S401,
Being in normal operation, the resistance value record between two contacts that main control chip first will detect preserves.
In step S402, when the resistance value detected between two contacts changes, illustrate may have occurred and take off film behavior,
I.e. aggressive behavior, now, trigger protection mechanism, carry out anti-demolition protection, i.e. put the state of main control chip of electronic equipment for not
Available, unavailable i.e. refer to that safety chip can not work, be equivalent to cancel, it is impossible to be read and can not input, forbid distorting password,
The key message of erasing main control chip storage and key etc., thus by change in resistance trigger protection mechanism, overcome conductive rubber
Opening, tamper-evident testing circuit also will not open circuit, it is impossible to trigger protection mechanism so that assailant can gently steal sensitive data information
Problem.Because even if assailant can use certain mode to be held on by tamper-evident testing circuit in advance, main control chip is examined
The resistance measured still can change.
In the specific implementation, if assailant's carbon film to be opened or be only merely and tear sub-fraction carbon film, crisp due to carbon film
Weak property, carbon film will be destroyed, and now, the carbon capacity of carbon film unit volume will change, and thus, main control chip is just
Can detect that the resistance value of the carbon film on two contacts changes, and then anti-demolition protection can be carried out with trigger protection mechanism,
Prevent assailant from gently stealing sensitive data information.
As the optional embodiment of the one in the present embodiment, in step S402, detect that the resistance value between two contacts is sent out
Changing, including: detect that the resistance value between the first two contact is more than preset resistive value with the difference recording the resistance value preserved.
Wherein, preset resistive value can be arranged according to technical staff's experience, to prevent user's imprudence from being fallen by electronic equipment on the ground or collision, makes
There is small change in the carbon capacity obtaining carbon film unit volume, and then the least change in resistance detected, false triggering protection mechanism
Situation.
By the guard method of the electronic equipment that the present embodiment provides, even if can overcome in existing equipment, conductive rubber is opened,
Tamper-evident testing circuit also will not open circuit, it is impossible to trigger protection mechanism so that assailant can gently steal the problem of sensitive data information,
Improve the safety of electronic equipment, i.e. assailant and once tear machine open, machine does not the most work destroyed.
Any process described otherwise above or method describe and are construed as in flow chart or at this, represent include one or
The module of code, fragment or the part of the executable instruction of the more steps for realizing specific logical function or process, and
The scope of the preferred embodiment of the present invention includes other realization, wherein can not be by order that is shown or that discuss, including root
According to involved function by basic mode simultaneously or in the opposite order, performing function, this should be by embodiments of the invention institute
Belong to those skilled in the art to be understood.
Should be appreciated that each several part of the present invention can realize by hardware, software, firmware or combinations thereof.In above-mentioned enforcement
In mode, multiple steps or method can be with storing the software or firmware that in memory and be performed by suitable instruction execution system
Realize.Such as, if realized with hardware, with the most the same, available following technology well known in the art
In any one or their combination realize: have and patrol for the discrete of logic gates that data signal is realized logic function
Collect circuit, there is the special IC of suitable combination logic gate circuit, programmable gate array (PGA), field programmable gate
Array (FPGA) etc..
Those skilled in the art are appreciated that it is permissible for realizing all or part of step that above-described embodiment method carries
Instruct relevant hardware by program to complete, program can be stored in a kind of computer-readable recording medium, this program exists
During execution, including one or a combination set of the step of embodiment of the method.
Additionally, each functional unit in each embodiment of the present invention can be integrated in a processing module, it is also possible to be each
Unit is individually physically present, it is also possible to two or more unit are integrated in a module.Above-mentioned integrated module is the most permissible
The form using hardware realizes, it would however also be possible to employ the form of software function module realizes.If integrated module is with software function mould
The form of block realizes and as independent production marketing or when using, it is also possible to be stored in a computer read/write memory medium.
Storage medium mentioned above can be read only memory, disk or CD etc..
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ",
Or specific features, structure, material or the feature that the description of " some examples " etc. means to combine this embodiment or example describes comprises
In at least one embodiment or example of the present invention.In this manual, the schematic representation to above-mentioned term not necessarily refers to
It is identical embodiment or example.And, the specific features of description, structure, material or feature can at any one or
Multiple embodiments or example combine in an appropriate manner.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary,
Being not considered as limiting the invention, those of ordinary skill in the art is in the case of without departing from the principle of the present invention and objective
Above-described embodiment can be changed within the scope of the invention, revise, replace and modification.The scope of the present invention is by appended power
Profit requires and equivalent limits.
Claims (10)
1. an electronic equipment, it is characterised in that described electronic equipment includes: covering, circuit board and main control chip, wherein:
Described covering fits together with described circuit board；
It is provided with two contacts on the inner surface of described circuit board, the inner surface of described covering is provided with carbon film, described carbon film
With said two contact, and connect said two contact；
Described main control chip is connected between said two contact, and described main control chip is for detecting the electricity between said two contact
Resistance, and record the described resistance value of preservation；When the resistance value detected between said two contact changes, put described master
The state of control chip is unavailable.
Electronic equipment the most according to claim 1, it is characterised in that
Described carbon film is distributed on subregion or the Zone Full of the inner surface of described covering.
3. an electronic equipment, it is characterised in that described electronic equipment includes: circuit board, the master control being located on described circuit board
Chip；
It is provided with two contacts on described circuit board, and is coated with carbon film, described carbon film and said two contact, and connect
Said two contact；
Described main control chip is connected between said two contact, and described main control chip is for detecting the electricity between said two contact
Resistance, and record the described resistance value of preservation；When the resistance value detected between said two contact changes, put described master
The state of control chip is unavailable.
Electronic equipment the most according to claim 3, it is characterised in that
Being also covered with covering on described carbon film, described covering is together with described carbon film, described press fit of circuit boards.
5. according to the electronic equipment described in claim 3 or 4, it is characterised in that
Described carbon film is distributed on subregion or the Zone Full of described circuit board.
6. according to the electronic equipment described in claim 1 or 2 or 4 or 5, it is characterised in that
Described covering is metal clips conducting film.
7. according to the electronic equipment described in any one of claim 1 to 6, it is characterised in that
Resistance value between said two contact determines according to the carbon capacity of described carbon film unit volume.
8. according to the electronic equipment described in any one of claim 1 to 7, it is characterised in that
Described main control chip, for detecting that the resistance value between said two contact changes, including:
Detect that the absolute value of difference of the resistance value of the resistance value between presently described two contacts and record preservation is more than pre-handicapping
Value.
9. the guard method of the electronic equipment being applied to as according to any one of claim 1 to 8, it is characterised in that institute
The method of stating includes:
Resistance value between detection said two contact, and record the described resistance value of preservation；
When the resistance value detected between said two contact changes, the state of the main control chip putting described electronic equipment is
Unavailable.
Method the most according to claim 9, it is characterised in that
The described resistance value detected between said two contact changes, including:
Detect that the absolute value of difference of the resistance value of the resistance value between presently described two contacts and record preservation is more than pre-handicapping
Value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510516190.7A CN105930747A (en) | 2015-08-20 | 2015-08-20 | Electronic device and protection method for electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510516190.7A CN105930747A (en) | 2015-08-20 | 2015-08-20 | Electronic device and protection method for electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105930747A true CN105930747A (en) | 2016-09-07 |
Family
ID=56839879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510516190.7A Pending CN105930747A (en) | 2015-08-20 | 2015-08-20 | Electronic device and protection method for electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105930747A (en) |
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| CN107148143A (en) * | 2017-07-04 | 2017-09-08 | 奇酷互联网络科技（深圳）有限公司 | Printed circuit board (PCB) and print circuit plates making method |
| CN109526179A (en) * | 2018-12-24 | 2019-03-26 | 出门问问信息科技有限公司 | Tear the detection device and detection method, electronic equipment of machine testing open for electronic equipment |
| CN110427787A (en) * | 2019-07-05 | 2019-11-08 | 林琳 | Hard disk and its data protecting device |
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Application publication date: 20160907 |