CN101527159A - Information storage circuit anti-theft device and method thereof - Google Patents
Information storage circuit anti-theft device and method thereof Download PDFInfo
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- CN101527159A CN101527159A CN200910106692A CN200910106692A CN101527159A CN 101527159 A CN101527159 A CN 101527159A CN 200910106692 A CN200910106692 A CN 200910106692A CN 200910106692 A CN200910106692 A CN 200910106692A CN 101527159 A CN101527159 A CN 101527159A
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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
- G06F21/88—Detecting or preventing theft or loss
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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
- G06F21/81—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer by operating on the power supply, e.g. enabling or disabling power-on, sleep or resume operations
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F2221/2101—Auditing as a secondary aspect
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Abstract
The invention discloses an information storage circuit anti-theft device comprising a protective shell arranged around the information storage circuit and a anti-theft circuit arranged in the protective shell, wherein, the anti-theft circuit comprises an electric power, a resistor matrix circuit communicated with the electric power, a switch positioned in the resistor matrix circuit, a reactive circuit communicated with the resistor matrix circuit, a controller communicated with the reactive circuit and a trigger circuit communicated with the controller; the controller randomly outputs different command signals to each switch to compose a dynamically changing resistance network, and each kind of command signal combination all has matchable normal reactive signals stored in the controller; when the anti-theft circuit suffers any destroy, and the reactive signals received by the controller does not match the normal reactive signals matching with the command signals combination, the controller outputs trigger signals to the trigger circuit and the trigger circuit executes protection action. The invention also discloses the method thereof.
Description
Technical field
The present invention relates to a kind of information-based product anti-theft device and method thereof, a kind of important information to information storage circuit (as POS machine terminal, code keypad, have the circuit of important procedure software etc.) of more specifically saying so can play the anti-devices and methods therefor of effect of stealing.
Background technology
Along with development of electronic technology, human society has stepped into informationalized epoch, the increasing important information of people is by various electronic equipment and processing, yet these electronic equipments can cause stolen unavoidably because of improper storage or the situation generation such as lose.And these electronic equipments that fall into other people hand are copied the important information of getting inside after might being torn open machine by the people at any time.In the electronic equipment such as POS machine, code keypad, PDA, need be provided with memory storage and be used to store relevant confidential information, as digital certificate, user profile etc.But this class memory storage often is in unsafe environment for use, and its canned data is stolen by other people easily and illegally used, and brings infringement for the possessor or the public's interests.Be directed to this; people develop various protection structures; be used to protect the safety of information-storing device; illegally stolen by other people to prevent confidential information wherein; be to disclose a kind of anti-shell of distorting that is used for electronic circuit in the document of CN1510810A as Patent Office of the People's Republic of China's publication number; we are not difficult to find out from this patent documentation; because of its conductor pattern simplicity of design; the electronic product overwhelming majority produces in batches; the structure of same bulk article is the same; the stealer can be known inner structure by the electronic equipment of taking same model apart fully; externally utilize the lead short circuit when stealing again; just can open electronic equipment at an easy rate, and cause the important information in the electronic equipment to be in the highly dangerous.Its reason is in being changeless to the anti-tamper arrangement of conductors structure that plays an important role, also just because of this changeless arrangement of conductors provides the chance of committing theft to the stealer.
Summary of the invention
The objective of the invention is to provides a kind of anti-theft device and method thereof of more reliable, safe information storage circuit for overcoming the deficiencies in the prior art.
The technology contents of the present invention's information storage circuit anti-theft device is: a kind of information storage circuit anti-theft device, comprise and be located at information storage circuit protecting sheathing all around and the antitheft sense circuit of being located in the protecting sheathing, described protecting sheathing is removable, it is characterized in that described antitheft sense circuit comprises power supply, the resistor matrix circuit that connects with power supply, be located at the switch in the resistor matrix circuit, the feedback circuit that connects with the resistor matrix circuit, controller that connects with feedback circuit and the trigger circuit that connect with controller, described switch is provided with the control end that connects with controller, described controller is exported difference randomly and is controlled signal to each switch, constitute the resistor network of dynamic change, each control signal of each output constitutes the control signal combination; The combination of every kind of control signal all has the normal feedback signal that is complementary and is stored in the controller; Controller output control signal is incorporated into each switch, and when the normal feedback signal that feedback signal that controller receives and the combination of this control signal are mated matched, controller did not produce trigger pip; When each resistance and switch by short circuit, protecting sheathing is separated or protecting sheathing when destroyed by any; the normal feedback signal that feedback signal that feedback circuit receives and the combination of this control signal are mated does not match; controller output trigger pip is to trigger circuit, and the trigger circuit execute protection moves.
Its further technology contents is: described feedback circuit comprise be series at the divider resistance between resistor matrix circuit and power supply one end and be located at divider resistance and the resistor matrix circuit between feedback output end, described feedback output end connects with controller.Described switch is semiconductor switch and/or relay switch.
Its further technology contents is: described protecting sheathing comprise the substrate that is used to set firmly information storage circuit the protection zone and with substrate be the removable case that is fixedly connected, substrate is the protection zone in the conjunction plane and the interior zone thereof of itself and case; The lead that described power supply, resistor matrix circuit, switch, controller, feedback circuit, trigger circuit and being used to connect them is located at respectively in the case and in the protection zone of substrate and by several electric contacts of being located on the conjunction plane and is constituted aforesaid antitheft sense circuit, and described trigger circuit electrically connect with information storage circuit.
Its further technology contents is: described controller, trigger circuit, feedback circuit all are located in the protection zone of substrate; resistor matrix circuit and switch are located in the protection zone of case and/or substrate, the power supply of antitheft sense circuit and the power sharing of information storage circuit.
Its further technology contents is: described substrate is provided with some electric contacts that are used to connect each resistor matrix circuit and switch in conjunction plane.
Its further technology contents is: the middle layer of protecting sheathing and/or endosexine are provided with the lead that is net distribution that is used for connection electrical resistance matrix circuit and switch, and described protection action is the important information in warning or the removing information storage circuit.
Its further technology contents is: described case inboard is provided with the downward opening pcb board cover that is made of five pcb boards that electrically connect mutually, and described pcb board cover is provided with aforesaid resistor matrix circuit, switch and lead.
The technology contents of the present invention's information storage circuit anti-theft method is: be provided with the omnibearing protection shell in the periphery of information storage circuit, protecting sheathing is provided with split type conjunction plane, in protecting sheathing, be provided with the antitheft sense circuit that can play the netted laying of security protection wall effect to information storage circuit, antitheft sense circuit comprises power supply and the resistor matrix circuit that is connected into a loop, and is located at the feedback circuit between power supply and the resistor matrix circuit, be located at the switch in the resistor matrix circuit, give the controller of switch input control signal, the trigger circuit of execute protection action; Antitheft sense circuit is provided with electric contact in the split type conjunction plane inboard of protecting sheathing, detects the safety case of protecting sheathing by antitheft sense circuit; Wherein, the transmission of controller randomness ground is respectively organized control signal and is incorporated into each switch, and feedback circuit is a safe condition when exporting controller to as if the signal that has and normal feedback signal matches; When if the signal of feedback circuit does not match with normal feedback signal, controller output trigger pip is to trigger circuit, and the trigger circuit execute protection moves.
Its further technology contents is: the power supply of antitheft sense circuit and the power sharing of information storage circuit; each resistance of described resistor matrix circuit is to add randomness selection in man-hour, stores the corresponding normal feedback signal of each control information combination when controller works on power after the protecting sheathing of information storage circuit is installed first.
Its further technology contents is: randomly drawing the part electric contact in electric contact has collets in its surface-coated; actual electrical contact with the protecting sheathing that constitutes each information storage circuit has nothing in common with each other, and stores the corresponding normal feedback signal of each control information combination when controller works on power after the protecting sheathing of information storage circuit is installed first.
The present invention's beneficial effect compared with prior art is: the anti-theft device of information storage circuit of the present invention makes up because of the control signal of utilizing controller to send incessantly at random; thereby produce the resistor matrix circuit of continuous dynamic change; thereby make that the resistor matrix circuit occurs that route is cut off, circuit all can utilize feedback circuit to detect antitheft sense circuit during by situations such as short circuit or equivalence replacement to have suffered destruction, trigger pip is reported to the police or the protection of removing important information is moved and send.Resistance combination distribution mode in the resistor matrix circuit of each device is all inequality in addition, add the man-hour resistor-type and number select (it also can be different that the resistor matrix circuit of same device can adopt identical resistance) at random by process equipment, also can adopt part electric contact to carry out insulation processing (to constitute different effective electric contact distributed architectures to conjunction plane, be insulated the electric contact that electric contact that piece covers only accounts for the part of electric contact and only limits to be used for the lead of electric matrix circuit and switch), make the stealer can't be by tearing the circuit structure that machine analyzes the anti-theft device of same model open, thereby further effectively prevented the possibility that information storage circuit is stolen, can improve the reliability and the security of the electronic product or the equipment of the memory circuit that has important information widely.
Below in conjunction with the drawings and specific embodiments the present invention is further described.
Description of drawings
Fig. 1 is the block diagram of information storage circuit anti-theft device specific embodiment of the present invention;
Fig. 2 is the electric contact distribution schematic diagram of the conjunction plane of middle protecting sheathing embodiment illustrated in fig. 1;
Fig. 3 is the present invention's resistor matrix circuit and the perspective view that switch all is located at the interior embodiment of case;
Fig. 3 A is the perspective view of another embodiment of the present invention's case;
Fig. 3 B is the solid blast structural representation of the pcb board cover among Fig. 3 A;
Fig. 4 is the circuit theory diagrams of information storage circuit anti-theft device specific embodiment of the present invention;
Fig. 5-1 is the equivalent circuit diagram of the only S1 closure among Fig. 4;
Fig. 5-2 is the equivalent circuit diagram of the only S2 closure among Fig. 4;
Fig. 5-3 is the equivalent circuit diagram of the only S3 closure among Fig. 4;
Fig. 6-1 is only S11, S12 among Fig. 4 and the equivalent circuit diagram of S1 closure;
Fig. 6-1A is the circuit diagram of the C point among Fig. 6-1 when being disconnected;
Fig. 6-1B is the circuit diagram when replacing with equivalent resistance RA between A, the B among Fig. 6-1;
Fig. 6-2 is only S11, S12 among Fig. 4 and the equivalent circuit diagram of S2 closure;
Fig. 6-3 is only S11, S12 among Fig. 4 and the equivalent circuit diagram of S3 closure;
Fig. 7-1 is only S11, S13 among Fig. 4 and the equivalent circuit diagram of S1 closure;
Fig. 7-2 is only S11, S13 among Fig. 4 and the equivalent circuit diagram of S2 closure;
Fig. 7-3 is only S11, S13 among Fig. 4 and the equivalent circuit diagram of S3 closure.
The accompanying drawing identifier declaration
1 information storage circuit, 2 other circuit
3 substrates, 31 substrate protection zones
30 substrate conjunction planes, 4 protecting sheathings
5 cases, 50 case conjunction planes
The antitheft sense circuit B part of the antitheft sense circuit A part of 6A 6B
61 resistor matrix circuit, 62 switches
63 feedback circuits, 64 controllers
65 trigger circuit, 66 leads
660 electric contacts, 661 collets
7 pcb board covers, 70 PCB cover plates
71 PCB side plates
Embodiment
In order to more fully understand technology contents of the present invention, below in conjunction with specific embodiment technical scheme of the present invention is further introduced and explanation, but be not limited to this.
As shown in Figure 1, a kind of information storage circuit anti-theft device of the present invention, comprise and be located at information storage circuit 1 protecting sheathing 4 all around and the antitheft sense circuit of being located in the protecting sheathing 4 (being divided into antitheft sense circuit A part 6A and the antitheft sense circuit B part 6B that is located on the case 5 in the protection zone 31 that is located at substrate 3 in the present embodiment), protecting sheathing 4 is removable, antitheft sense circuit comprises power supply 60, the resistor matrix circuit 61 that connects with power supply 60, be located at the switch 62 in the resistor matrix circuit 61, the feedback circuit 63 that connects with resistor matrix circuit 61, controller 64 that connects with feedback circuit 63 and the trigger circuit 65 that connect with controller 64, switch 62 is provided with the control end that connects with controller 64, controller 64 is exported difference randomly and is controlled signal to each switch 62, constitute the resistor network of dynamic change, each control signal of each output constitutes the control signal combination; The combination of every kind of control signal all has the normal feedback signal that is complementary and is stored in the controller 64; Controller 64 output control signals are incorporated into each switch, and when the normal feedback signal that feedback signal that controller 64 receives and the combination of this control signal are mated matched, controller 64 did not produce trigger pip; Resistance in antitheft sense circuit and switch by short circuit, protecting sheathing is separated or protecting sheathing (protecting sheathing 4 comprises the protection zone 30 of the substrate 3 that is used to set firmly information storage circuit 1 and is the removable case that is fixedly connected 5 with substrate 3; substrate 3 is protection zone 30 in the conjunction plane and the interior zone thereof of itself and case 5) when destroyed by any; the normal feedback signal that feedback signal that feedback circuit 63 receives and the combination of this control signal are mated does not match; 64 output of controller trigger pip is to trigger circuit 65, and trigger circuit 65 execute protections move.Feedback circuit 63 comprises that being series at resistor matrix circuit 61 (can be power positive end with power supply 60 1 ends, also can be negative terminal/earth terminal) between divider resistance (R as shown in Figure 4) (divider resistance is better simply structure, also can semiconductor amplifying circuit etc., also can adopt the resistor matrix circuit of other one group of dynamic change---be about to feedback output end be located between the dynamic resistance matrix circuit of two series connection) and be located at feedback output end between divider resistance and the resistor matrix circuit, feedback output end connects (specifically also can increase conversion of signals or signal amplifier spares such as A/D converter in the enforcement according to actual needs) with controller.Switch 62 both can adopt semiconductor switch (as triode, also can be other special-purpose analog switch device), also can be mechanical switch (as relay).The lead 66 that power supply 60 in the present embodiment, resistor matrix circuit 61, switch 62, controller 64, feedback circuit 63, trigger circuit 65 and being used to connect them be located in the case 5 respectively and the protection zone 31 of substrate 3 in and constitute an omnibearing antitheft sense circuit network by several electric contacts 660 of being located on the conjunction plane (case conjunction plane 50 and substrate conjunction plane 30), trigger circuit 65 electrically connect (being used for transmission execution signal) with information storage circuit 1.Resistor matrix circuit in the antitheft sense circuit A part and the switch electric contact 660 by being positioned at substrate conjunction plane 30 connects with resistor matrix circuit and switch on being located at case, and the electric contact distribution plan as shown in Figure 2.
The perspective view of embodiment shown in Figure 1 can be understood with reference to spatial structure embodiment illustrated in fig. 3; Resistor matrix circuit 61 and switch 62 all are located at the inboard of case 5, and are provided with the lead 66 of annular spread on the conjunction plane 30 of substrate but in the embodiment shown in fig. 3.
Among the embodiment as shown in Figure 3, resistor matrix circuit 61 and switch 62 all are located at the inboard of case 5, are complete antitheft sense circuit of 65 formations by lead 66 and electric contact 660 with the power supply 60, controller 64, the trigger circuit that are located on the substrate 3; Be positioned at lead on the substrate except being distributed on the substrate conjunction plane 30, can also be located on the pcb board of substrate or in the pcb board interlayer.Several electric contacts that conjunction plane is provided with are positioned at the inboard of conjunction plane.Among this embodiment, be provided with a pcb board that is used for installing resistor matrix circuit and switch in the case, connect with the electric contact of case conjunction plane by the lead that is embedded on the case wall again.
During enforcement, the resistance in the matrix circuit can adopt Chip-R, also can adopt the resistance of burying that is embedded in the PCB interlayer circuit board.The protection action that trigger circuit are carried out is the important information in warning or the removing information storage circuit; also comprise and remove important program or software content; as some the electronic product of use value is arranged extremely, can utilize this kind method to protect its internal information not plagiarized or steal by stealer.
For more tight safeguard measure is provided to information storage circuit, Fig. 3 A shows the spatial structure of another embodiment of case, the case inboard is provided with the downward opening pcb board cover 7 that is made of five pcb boards (shown in Fig. 3 B) that electrically connect mutually, and the pcb board cover is by constituting a PCB cover plate 70 and four 71 mutual electrically connections of PCB side plates; All be provided with resistor matrix circuit, switch and lead on each pcb board, utilize the electric contact of PCB edge to be connected into the network of resistor matrix circuit again, the bottom margin of four PCB side plates is provided with electric contact and connects with resistor matrix circuit on the substrate.And resistor matrix circuit and switch and be used to connect endosexine or the middle layer that lead between them can be located at pcb board.Electric contact between each pcb board can be microswitch or metal clips.
The circuit theory reduced graph that Fig. 4 adopts for specific embodiment, the resistance in the circuit and the quantity of switch can be selected according to the size of information storage circuit, its topology connecting relation can also adopt modes such as star, 3 D stereo shape except adopting the crisscross type among the figure.
Below in conjunction with specific embodiment circuit theory diagrams shown in Figure 4, situation when switch is in closure state not describes, (switch can be that semiconductor devices such as triode analog switch also can be mechanical devices such as relay etc. to allow auditor and reader further understand technology contents of the present invention, closed contact resistance is that convenience of calculation is ignored), but be not limited to this.
First kind of state, the state of each switch is: [S11, S12, S13; S21, S22, S23]=[0,0,0; 0,0,0] (0 representative disconnects, and 1 represents closure), the equivalent circuit diagram when Fig. 5-1 is the S1 closure, Vcheck=VCC*R/ (RV11+RV12+RV13+R) is if all resistances are got " 1 ", then Vcheck=0.25*Vcc; Fig. 5-2 is the equivalent circuit diagram of S2 closure, and Vcheck=VCC*R/ (RV21+RV22+RV23+R) is if all resistances are got " 1 ", then Vcheck=0.25*Vcc; Fig. 5-3 is the equivalent circuit diagram of S3 closure, and Vcheck=VCC*R/ (RV31+RV32+RV33+R) is if all resistances are got " 1 ", then Vcheck=0.25*Vcc.
Second kind of state, the state of each switch is: [S11, S12, S13; S21, S22, S23]=[1,1,0; 0,0,0], (0 representative disconnects, 1 represents closure), Fig. 6-1 is the equivalent circuit diagram of S1 closure, Vcheck=VCC*R/{RV11+[(RV12+RV13) * (RH11+RV22+RV23)]/(RV12+RV13+RH11+RV22+RV23)+R}, if all resistances are got " 1 ", then Vcheck=VCC*5/16=0.3125*Vcc;
Fig. 6-2 is the equivalent circuit diagram of S2 closure, Vcheck=VCC*R/{RV21+[(RH11+RV12+RV13) * (RV22+RV23)]/(RV12+RV13+RH11+RV22+RV23)+R}, if all resistances are got " 1 ", then Vcheck=}=VCC*5/16=0.3125*Vcc;
Fig. 6-3 is the equivalent circuit diagram of S3 closure, and Vcheck=VCC*R/ (RV31+RV32+RV33+R) is if all resistances are got " 1 ", then Vcheck=0.25*Vcc.
The third state, each on off state is: [S11, S12, S13; S21, S22, S23]=[1,0,1; 0,0,0], (0 representative disconnects, and 1 represents closure),
Fig. 7-1 is the equivalent circuit diagram of S1 closure, Vcheck=VCC*R/{[(RH11+RH12+RV32+RV33) * (RV12+RV13)]/(RH11+RH12+RV32+RV33+RV12+RV13) ++ RV11+R}, if all resistances are got " 1 ", then Vcheck=}=VCC*6/20=0.3*Vcc.
Fig. 7-2 is the equivalent circuit diagram of S2 closure, Vcheck=VCC*R/ (RV21+RV22+RV23+R) is if all resistances are got " 1 ", if then all resistances of Vcheck=0.25*Vcc are got " 1 ", then Vcheck=}=VCC*5/16=0.3125*Vcc.
Fig. 7-3 is the circuit diagram of S3 closure, Vcheck=VCC*R/{[(RH11+RH12+RV12+RV13) * (RV32+RV33)] if/(RH11+RH12+RV12+RV13+RV32+RV33) ++ all resistances of RV31+R} are got " 1 ", then Vcheck=}=VCC*6/20=0.3*Vcc.
Protective effect for example
1, suppose that C point victim cuts off, when at second kind of state, carry out annexation that the first via detects (S 1 closure) shown in Fig. 6-1A,
V’check＝VCC*R/(RV11+RV12+RV13+R)
If all resistances are got " 1 "; V ' check=0.25*Vcc ≠ 0.3125*Vcc then; relatively V ' check and the due value of Vcheck 0.3125*Vcc find unequal; just can judge that holding circuit is attacked; CPU control protection triggers topworks and protects action, for example key message self-destruction or warning etc.
Carrying out also can detecting when certain road is detected under other state attacked by this.
2, suppose that when the third state (resistance is 2 victims of A, B with equivalent resistance RA
RA＝RH11//(RV12+RV13+RV22+RV23)
=[RH11*RV12+RV13+RV22+RV23)]/(RV12+RV13+RV22+RV23+RH11)) replace,
When being in first kind of state, carry out annexation that the first via detects (S1 closure) shown in Fig. 6-1B, V " check=VCC*R/{RV11+[(RV12+RV13) * (RA+RV22+RV23)]/(RV12+RV13+RA+RV22+RV23)+R},
If all resistances are got " 1 "; V then " check=}=VCC*6/20=0.3158*Vcc ≠ 0.25*Vcc V relatively " check and the due value of Vcheck 0.25*Vcc discovery be unequal; just can judge that holding circuit is attacked; controller sends trigger pip to trigger circuit; the execute protection action, for example key message self-destruction or warning etc.Carrying out also can detecting when certain road is detected under other state attacked by this.
The present invention's information storage circuit anti-theft method is: be provided with the omnibearing protection shell in the periphery of information storage circuit, protecting sheathing is provided with split type conjunction plane, in protecting sheathing, be provided with the antitheft sense circuit that can play the netted laying of security protection wall effect to information storage circuit, antitheft sense circuit comprises power supply and the resistor matrix circuit that is connected into a loop, and be located at feedback circuit between power supply and the resistor matrix circuit, be located at the switch in the resistor matrix circuit, the trigger circuit of the controller of giving the switch input control signal, execute protection action; Antitheft sense circuit is provided with electric contact in the split type conjunction plane inboard of protecting sheathing, detects the safety case of protecting sheathing by antitheft sense circuit; Wherein, (also be randomness the break time of transmission to controller incessantly, between several seconds to 30 second) randomness sends and respectively organizes control signal and be incorporated into each switch, and feedback circuit is if be safe condition when having the signal that matches with normal feedback signal to export controller to; When if the signal of feedback circuit does not match with normal feedback signal, controller output trigger pip is to trigger circuit, and the trigger circuit execute protection moves.For the antitheft sense circuit that makes the anti-theft device that adopts same model has nothing in common with each other; can adopt two kinds of methods; the first: each resistance of resistor matrix circuit is adding randomness selection in man-hour; it two is: randomly drawing the part electric contact in the electric contact has collets (as shown in Figure 2 be positioned at collets 661 on the electric contact 660) in its surface-coated; actual electrical contact with the protecting sheathing that constitutes each information storage circuit has nothing in common with each other; then; the corresponding normal feedback signal of storing each control information combination after the protecting sheathing of information storage circuit is installed when controller works on power first (also constitutes the inequality of resistor matrix circuit, more to the more effective anti-effect of stealing.
In sum; the present invention's anti-theft device makes up because of the control signal of utilizing controller to send incessantly at random; thereby produce the resistor matrix circuit of continuous dynamic change; thereby make that the resistor matrix circuit occurs that route is cut off, circuit all can utilize feedback circuit to detect antitheft sense circuit during by situations such as short circuit or equivalence replacement to have suffered destruction, trigger pip is reported to the police or the protection of removing important information is moved and send.Resistance combination distribution mode in the resistor matrix circuit of each device is all inequality in addition, add the man-hour resistor-type and number select (it also can be different that the resistor matrix circuit of same device can adopt identical resistance) at random by process equipment, also can adopt part electric contact to carry out insulation processing (to constitute different effective electric contact distributed architectures) to conjunction plane, make the stealer can't be by tearing the circuit structure that machine analyzes the anti-theft device of same model open, thereby further effectively prevented the possibility that information storage circuit is stolen, can improve reliability of products and the security of having used the present invention widely.
The above only further specifies technology contents of the present invention with embodiment, so that the reader is more readily understood, but does not represent embodiments of the present invention to only limit to this, anyly extends or recreation according to the technology that the present invention did, and all is subjected to protection of the present invention.Protection scope of the present invention is as the criterion with claims.
Claims (10)
1. information storage circuit anti-theft device, comprise and be located at information storage circuit protecting sheathing all around and the antitheft sense circuit of being located in the protecting sheathing, described protecting sheathing is removable, it is characterized in that described antitheft sense circuit comprises power supply, the resistor matrix circuit that connects with power supply, be located at the switch in the resistor matrix circuit, the feedback circuit that connects with the resistor matrix circuit, controller that connects with feedback circuit and the trigger circuit that connect with controller, described switch is provided with the control end that connects with controller, described controller is exported difference randomly and is controlled signal to each switch, constitute the resistor network of dynamic change, each control signal of each output constitutes the control signal combination; The combination of every kind of control signal all has the normal feedback signal that is complementary and is stored in the controller; Controller output control signal is incorporated into each switch, and when the normal feedback signal that feedback signal that feedback circuit receives and the combination of this control signal are mated matched, controller did not produce trigger pip; When each resistance and switch by short circuit, protecting sheathing is separated or protecting sheathing when destroyed by any; the normal feedback signal that feedback signal that controller receives and the combination of this control signal are mated does not match; controller output trigger pip is to trigger circuit, and the trigger circuit execute protection moves.
2. information storage circuit anti-theft device according to claim 1, it is characterized in that described feedback circuit comprise be series at the divider resistance between resistor matrix circuit and power supply one end and be located at divider resistance and the resistor matrix circuit between feedback output end, described feedback output end connects with controller; Described switch is semiconductor switch and/or relay switch.
3. information storage circuit anti-theft device according to claim 1 and 2, it is characterized in that described protecting sheathing comprise the substrate that is used to set firmly information storage circuit the protection zone and with substrate be the removable case that is fixedly connected, substrate is the protection zone in the conjunction plane and the interior zone thereof of itself and case; The lead that described power supply, resistor matrix circuit, switch, controller, feedback circuit, trigger circuit and being used to connect them is located at respectively in the case and in the protection zone of substrate and by several electric contacts of being located on the conjunction plane and is constituted aforesaid antitheft sense circuit, and described trigger circuit electrically connect with information storage circuit.
4. information storage circuit anti-theft device according to claim 3; it is characterized in that described controller, trigger circuit, feedback circuit all be located in the protection zone of substrate; resistor matrix circuit and switch are located in the protection zone of case and/or substrate, the power supply of antitheft sense circuit and the power sharing of information storage circuit.
5. information storage circuit anti-theft device according to claim 3 is characterized in that described substrate is provided with some electric contacts that are used to connect each resistor matrix circuit and switch in conjunction plane.
6. information storage circuit anti-theft device according to claim 1; the middle layer and/or the endosexine that it is characterized in that protecting sheathing are provided with the lead that is net distribution that is used for connection electrical resistance matrix circuit and switch, and described protection action is the important information in warning or the removing information storage circuit.
7. information storage circuit anti-theft device according to claim 4, it is characterized in that described case inboard is provided with the downward opening pcb board cover that is made of five pcb boards that electrically connect mutually, described pcb board cover is provided with aforesaid resistor matrix circuit, switch and lead.
8. information storage circuit anti-theft method, it is characterized by: be provided with the omnibearing protection shell in the periphery of information storage circuit, protecting sheathing is provided with split type conjunction plane, in protecting sheathing, be provided with the antitheft sense circuit that can play the netted laying of security protection wall effect to information storage circuit, antitheft sense circuit comprises power supply and the resistor matrix circuit that is connected into a loop, and be located at feedback circuit between power supply and the resistor matrix circuit, be located at the switch in the resistor matrix circuit, the trigger circuit of the controller of giving the switch input control signal, execute protection action; Antitheft sense circuit is provided with electric contact in the split type conjunction plane inboard of protecting sheathing, detects the safety case of protecting sheathing by antitheft sense circuit; Wherein, the transmission of controller randomness ground is respectively organized control signal and is incorporated into each switch, and feedback circuit is a safe condition when exporting controller to as if the signal that has and normal feedback signal matches; When if the signal of feedback circuit does not match with normal feedback signal, controller output trigger pip is to trigger circuit, and the trigger circuit execute protection moves.
9. a kind of information storage circuit anti-theft method according to claim 8; each resistance that it is characterized in that described resistor matrix circuit is to add randomness selection in man-hour, stores the corresponding normal feedback signal of each control information combination when controller works on power after the protecting sheathing of information storage circuit is installed first.
10. a kind of information storage circuit anti-theft method according to claim 8; it is characterized in that randomly drawing in the described electric contact part electric contact and collets are arranged in its surface-coated; actual electrical contact with the protecting sheathing that constitutes each information storage circuit has nothing in common with each other, and stores the corresponding normal feedback signal of each control information combination when controller works on power after the protecting sheathing of information storage circuit is installed first.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910106692 CN101527159B (en) | 2009-04-18 | 2009-04-18 | Information storage circuit anti-theft device and method thereof |
| PCT/CN2010/071738 WO2010118678A2 (en) | 2009-04-18 | 2010-04-13 | Burglarproof device for information storage circuit and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910106692 CN101527159B (en) | 2009-04-18 | 2009-04-18 | Information storage circuit anti-theft device and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101527159A true CN101527159A (en) | 2009-09-09 |
| CN101527159B CN101527159B (en) | 2011-01-05 |
Family
ID=41094985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910106692 Active CN101527159B (en) | 2009-04-18 | 2009-04-18 | Information storage circuit anti-theft device and method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101527159B (en) |
| WO (1) | WO2010118678A2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010118678A2 (en) * | 2009-04-18 | 2010-10-21 | 深圳市新国都技术股份有限公司 | Burglarproof device for information storage circuit and method thereof |
| CN102324139A (en) * | 2011-03-30 | 2012-01-18 | 青岛海信智能商用设备有限公司 | Bank card payment terminal equipment with liquid crystal data anti-tampering protection device |
| CN103605932A (en) * | 2012-12-13 | 2014-02-26 | 深圳市证通电子股份有限公司 | Data security device and anti-disassembling machine network thereof |
| CN103778390A (en) * | 2013-01-17 | 2014-05-07 | 深圳市证通电子股份有限公司 | Controller for disassembly preventing network and data security device |
| CN105424609A (en) * | 2015-11-05 | 2016-03-23 | 国网山西省电力公司大同供电公司 | Forced monitoring system for waste gas emission |
| CN106022174A (en) * | 2016-06-24 | 2016-10-12 | 福建睿矽微电子科技有限公司 | Safety equipment and damage detection method |
| TWI700610B (en) * | 2019-03-15 | 2020-08-01 | 立端科技股份有限公司 | Anti-theft mechanism |
| CN114067855A (en) * | 2021-12-10 | 2022-02-18 | 北京理工大学 | Self-destruction control mechanism system of energetic material driving chip and implementation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8884757B2 (en) | 2011-07-11 | 2014-11-11 | Verifone, Inc. | Anti-tampering protection assembly |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3129258B2 (en) * | 1997-10-28 | 2001-01-29 | 日本電気株式会社 | Important data confidentiality method and important data confidentiality system by distortion detection |
| JPH11353237A (en) * | 1998-06-05 | 1999-12-24 | Fujitsu Ltd | Electronic commerce device |
| US6853093B2 (en) * | 2002-12-20 | 2005-02-08 | Lipman Electronic Engineering Ltd. | Anti-tampering enclosure for electronic circuitry |
| JP4349389B2 (en) * | 2006-07-28 | 2009-10-21 | ソニー株式会社 | Data storage device and communication device |
| CN101527159B (en) * | 2009-04-18 | 2011-01-05 | 深圳市新国都技术股份有限公司 | Information storage circuit anti-theft device and method thereof |
-
2009
- 2009-04-18 CN CN 200910106692 patent/CN101527159B/en active Active
-
2010
- 2010-04-13 WO PCT/CN2010/071738 patent/WO2010118678A2/en active Application Filing
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010118678A2 (en) * | 2009-04-18 | 2010-10-21 | 深圳市新国都技术股份有限公司 | Burglarproof device for information storage circuit and method thereof |
| WO2010118678A3 (en) * | 2009-04-18 | 2010-12-09 | 深圳市新国都技术股份有限公司 | Burglarproof device for information storage circuit and method thereof |
| CN102324139A (en) * | 2011-03-30 | 2012-01-18 | 青岛海信智能商用设备有限公司 | Bank card payment terminal equipment with liquid crystal data anti-tampering protection device |
| CN103605932A (en) * | 2012-12-13 | 2014-02-26 | 深圳市证通电子股份有限公司 | Data security device and anti-disassembling machine network thereof |
| CN103605932B (en) * | 2012-12-13 | 2017-11-03 | 深圳市证通电子股份有限公司 | Data security devices and its tamper machine network |
| CN103778390A (en) * | 2013-01-17 | 2014-05-07 | 深圳市证通电子股份有限公司 | Controller for disassembly preventing network and data security device |
| CN103778390B (en) * | 2013-01-17 | 2017-04-26 | 深圳市证通电子股份有限公司 | Controller for disassembly preventing network and data security device |
| CN105424609A (en) * | 2015-11-05 | 2016-03-23 | 国网山西省电力公司大同供电公司 | Forced monitoring system for waste gas emission |
| CN106022174A (en) * | 2016-06-24 | 2016-10-12 | 福建睿矽微电子科技有限公司 | Safety equipment and damage detection method |
| TWI700610B (en) * | 2019-03-15 | 2020-08-01 | 立端科技股份有限公司 | Anti-theft mechanism |
| CN114067855A (en) * | 2021-12-10 | 2022-02-18 | 北京理工大学 | Self-destruction control mechanism system of energetic material driving chip and implementation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010118678A2 (en) | 2010-10-21 |
| WO2010118678A3 (en) | 2010-12-09 |
| CN101527159B (en) | 2011-01-05 |
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