CN103617908B - The keyboard safety protection device of payment terminal and method - Google Patents
The keyboard safety protection device of payment terminal and method Download PDFInfo
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- CN103617908B CN103617908B CN201310576172.9A CN201310576172A CN103617908B CN 103617908 B CN103617908 B CN 103617908B CN 201310576172 A CN201310576172 A CN 201310576172A CN 103617908 B CN103617908 B CN 103617908B
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Abstract
The invention provides a kind of keypad security guard method of payment terminal, by the safe processor driver output two groups independently secure network detection signal of payment terminal, secure network through two groups of cross arrangements of keyboard pcb board surrounding detects contact, then contact and corresponding two-tier network wiring is detected by the secure network of same two groups of cross arrangements corresponding on pot young sheet FPC diaphragm, the extruding of limited post is coordinated to form path again, again detection signal is turned back to the safety detection input circuit of safe processor, thus the interdigitated interlock realizing safety detection signal is to protect the safety of keyboard.Present invention also offers a kind of keyboard safety protection device of payment terminal, the present invention can realize the safety protecting mechanism of interdigitated interlock, and is detected by secure network and safety switch detection; Make equipment safer, improve the keypad security protection class of payment terminal.
Description
Technical field
The present invention relates to technical field of electronic equipment, particularly relate to a kind of keyboard safety protection device and method of payment terminal.
Background technology
Now, the electronic equipments such as the POS in financial field, code keypad, ATM, keyboard as input data information part, its input or store some hypersensitivity data messages.Along with the develop rapidly of science and technology; financial terminal product applications gets more and more; therefore, the safety requirements for these electronic equipments is more and more higher, in order to prevent electronic equipment tamper; antitheft; present financial payment terminal all must be designed with safety protecting mechanism, by the cooperation of shell and safety protective circuit, realizes the protection to payment terminal; prevent the important information such as password to be stolen, cause serious financial loss.
Payment terminal is generally installed by several pieces of circuit board mating mold shells and is formed, then the general all distribution design of the surrounding of these plates have electric contact, these electric contacts are all generally extruded just signal communication together by structure function with conductive rubber, then receive safety detection circuit, once shell is opened, these points disconnect, safe processor will detect that equipment is attacked, thus making equipment automatically remove the sensitive informations such as key, equipment is lockable, and does not allow it continue operating equipment.
Each safety detection electric contact of existing technology payment terminal disperses independently, then linked together by the mating reaction of structure, deliver to safety detection circuit, do not have formation to give mutual protection between them.These electric contacts often through some means than being easier to by each short circuit, then can being taken shell apart when triggering secure is not protected, in equipment, then hiding the device into steal information, steal crucial sensitive information.As: the means such as other people can use boring, laser, chemical solvent are invaded; make these there is no the first short circuit in shielded contact, then tear lid open, even if there is other detection technique to exist simultaneously; these technology itself are not subject to other protection, it can be allowed to lose efficacy by some means.
Provide one " uncap data self-desttruction equipment and the method for secure payment terminal " in prior art, see that publication number is:, publication date is: Chinese patent, whether the method adopts the detection method of uncapping based on conducting resinl to detect secure payment terminal and is opened; The described detection method of uncapping based on conducting resinl, refers to and arranges at least one contact point in the front of the circuit board of secure payment terminal, and arrange at least one contact point at the back side of the circuit board of secure payment terminal; On the fore shell and back cover of secure payment terminal, the position corresponding with contact point scribbles conducting resinl; Described contact point comprises two mutual disjunct pads; When fore shell and back cover close (during normal condition), two pads of contact point are by conducting resinl conducting, and now contact point is conducting state; Otherwise when fore shell or back cover are opened, be open circuit between two pads of contact point, now contact point is off state; If the microprocessor of secure payment terminal detects that arbitrary contact point is in off state, then judge that the protecgulum of secure payment terminal or bonnet are illegally opened, the microprocessor log-on data self-destruction operation in secure payment terminal.The data self-desttruction equipment and method is easy to implement, fail safe is high, cost is low of uncapping of this secure payment terminal.But the contact point in the method is not subject to any protection, contact ratio is wherein easier under attack.
One " keyboard safety protection device " is additionally provided in prior art, see that publication number is: 102779677A, publication date is: the Chinese patent of 2012-11-14, this invention is applicable to the field of safety protection of electronic equipment, this keyboard safety protection device comprises protective layer, the young sheet of pot, keyboard pcb board, keyboard pcb board is provided with button golden finger and safe processor, protective layer is by one deck pvdf membrane and be covered in first of pvdf membrane surface, second silver medal slurry composition, and first, second silver medal slurry surface is provided with first, second thin layer, first, second silver medal slurry is electrically connected with button golden finger, and be electrically connected with safe processor form safety detection circuit by keyboard pcb board.This invention is intended to solve the problem that the sensitive data information of electronic circuit is stolen, and provide protection comprehensively, the keyboard safety protection device of longer service life.But this device can not realize the protection mechanism realizing the interdigitated interlock of safety detection signal related in present patent application file.
Summary of the invention
One of the technical problem to be solved in the present invention, is the keyboard safety protection device providing a kind of payment terminal, makes payment terminal equipment safer, improves the keypad security protection class of payment terminal.
One of technical problem of the present invention is achieved in that a kind of keyboard safety protection device of payment terminal, and described device comprises keyboard pcb board, safe processor, button rubber and pot young sheet FPC diaphragm; Described safe processor is connected with keyboard pcb board;
The secure network that described pot young sheet FPC diaphragm surrounding is distributed with at least two group cross arrangements detects contact, and the secure network detection contact of each group comprises at least two secure networks and detects input contact and two corresponding secure networks detection output contacts; Two secure networks detect input contact and are positioned on an angle of pot young sheet FPC diaphragm surrounding simultaneously, and two secure networks detect output contact and are positioned on another angle of pot young sheet FPC diaphragm surrounding simultaneously;
Described pot young sheet FPC diaphragm is provided with two-layer network layout, and one deck network layout is arranged at pot young sheet FPC diaphragm upper surface, and the wiring of another layer network is arranged at the lower surface of pot young sheet FPC diaphragm; The network layout of each layer include two and walking line, two and the starting point of walking line is two secure networks detects input contacts, terminal is that two secure networks detect output contacts, and two and walking line around the surface of panful young sheet FPC diaphragm;
The secure network that the network layout of described one deck covers in the wiring of another layer network detects contact;
The secure network position that described keyboard pcb board surrounding is corresponding with pot young sheet FPC diaphragm being distributed with at least two same group cross arrangements detects contact;
Described pot young sheet FPC diaphragm is arranged on keyboard pcb board; and pot young sheet FPC diaphragm surrounding distributes, the secure network of two groups of cross arrangements detects the distribute secure network of two groups of cross arrangements of contact and keyboard pcb board surrounding and detects contact and overlap each other, and is connected after jointly being extruded with the limited post of payment terminal shell by described button rubber.
The technical problem to be solved in the present invention two, is the keypad security guard method providing a kind of payment terminal, can realizes the safety protecting mechanism of interdigitated interlock, and is detected by secure network and safety switch detection; Make equipment safer, improve the keypad security protection class of payment terminal.
Two of technical problem of the present invention is achieved in that a kind of keypad security guard method of payment terminal, described method is: the secure network arranging at least two group cross arrangements in the pot son sheet FPC diaphragm surrounding of payment terminal detects contact, and the secure network detection contact of each group comprises at least two secure networks and detects input contacts and two corresponding secure networks detection output contacts; Two secure networks detect input contact and are positioned on an angle of pot young sheet FPC diaphragm surrounding simultaneously, and two secure networks detect output contact and are positioned on another angle of pot young sheet FPC diaphragm surrounding simultaneously;
And two-layer network layout is provided with on pot young sheet FPC diaphragm, and one deck network layout is arranged at pot young sheet FPC diaphragm upper surface, the wiring of another layer network is arranged at the lower surface of pot young sheet FPC diaphragm; The network layout of each layer include two and walking line, two and the starting point of walking line is two secure networks detects input contacts, terminal is that two secure networks detect output contacts, and two and walking line around the surface of panful young sheet FPC diaphragm; The secure network that the network layout of described one deck covers in the wiring of another layer network detects contact;
The secure network that the position that the keyboard pcb board surrounding of payment terminal is corresponding with pot young sheet FPC diaphragm arranges at least two same group cross arrangements detects contact;
And described pot young sheet FPC diaphragm is positioned on keyboard pcb board, make the distribute secure network of two groups of cross arrangements of pot young sheet FPC diaphragm surrounding detect the distribute secure network of two groups of cross arrangements of contact and keyboard pcb board surrounding and detect contact and overlap each other, and be connected after jointly being extruded with the limited post of payment terminal shell by the button rubber of payment terminal;
By the safe processor driver output two groups independently secure network detection signal of payment terminal; secure network through two groups of cross arrangements of keyboard pcb board surrounding detects contact; then contact and corresponding two-tier network wiring is detected by the secure network of same two groups of cross arrangements corresponding on pot young sheet FPC diaphragm; the extruding of limited post is coordinated to form path again; again detection signal is turned back to the safety detection input circuit of safe processor, thus the interdigitated interlock realizing safety detection signal is to protect the safety of keyboard.
Tool of the present invention has the following advantages: safe processor driver output of the present invention two groups independently secure network detection signal; input and output secure network through the crossed geometry of keyboard pcb board detects contact; then contact and corresponding network layout is detected by the input and output secure network of same crossed geometry queueing discipline corresponding on pot young sheet FPC diaphragm; the effect of payment terminal limited post is coordinated to form path again; link the safety detection input circuit of safe processor again, realize the interdigitated interlock protection mechanism of safety detection signal.And the multichannel coordinating safe processor independently safety switch detect input circuit to the detection of safety switch signal electric contact, realize multi-faceted safe cross protection.Like this, assailant is difficult to attack equipment, is easy to triggering secure mechanism when the equipment of attack, makes safe processor signal under fire be detected, and the key automatically removed in keyboard and sensitive information, thus keyboard is protected; Make equipment safer, improve the keypad security protection class of payment terminal.
Accompanying drawing explanation
Fig. 1 is the structural representation of pot young sheet FPC diaphragm in the present invention.
Fig. 2 is the structural representation of the network layout of pot young sheet FPC diaphragm upper surface in the present invention.
Fig. 3 is the structural representation of the network layout of pot young sheet FPC diaphragm lower surface in the present invention.
Fig. 4 is the structural representation of button golden finger protection zone on keyboard pcb board in the present invention.
Fig. 5 is the structural representation that two secure networks in the present invention on an angle detect the relative position of contacts.
Embodiment
Refer to shown in Fig. 1 to Fig. 5, the keyboard safety protection device of a kind of payment terminal of the present invention, described device comprises keyboard pcb board, safe processor, button rubber and pot young sheet FPC diaphragm; Described safe processor is connected with keyboard pcb board;
The secure network that described pot son sheet FPC diaphragm surrounding is distributed with at least two group cross arrangements detects contact, and (as shown in Figure 1, two groups are respectively (101,103) and (111,113); (102,104) and (112,114) cross arrangement), the secure network detection contact of each group comprises at least two secure networks and detects two secure networks detection output contacts of input contacts and correspondence (as shown in Figure 1, (101,103) and two secure networks of (111,113) this group to detect input contacts be 101 and 103, it is 111 and 113 that two secure networks detect output contacts; It is 102 and 104 that two secure networks of (102,104) and (112,114) this group detect input contact, and it is 112 and 114 that two secure networks detect output contact); Two secure networks detect input contact and are positioned at (as: it is 101 and 103 that two secure networks detect input contact) on an angle of pot young sheet FPC diaphragm surrounding simultaneously, and two secure networks detect output contact and are positioned at (as: it is 111 and 113 that two secure networks detect output contact) on another angle of pot young sheet FPC diaphragm surrounding simultaneously; And two secure networks detection input contacts become cross arrangement with two secure networks detection output contacts;
As shown in Figures 2 and 3, described pot young sheet FPC diaphragm is provided with two-layer network layout, and one deck network layout is arranged at pot young sheet FPC diaphragm upper surface, and the wiring of another layer network is arranged at the lower surface of pot young sheet FPC diaphragm; The network layout of each layer include two and walking line, two and the starting point of walking line is two secure networks detects input contacts, terminal is that two secure networks detect output contacts, and two and walking line around the surface of panful young sheet FPC diaphragm; (as: in the network layout of one deck, the also walking line (101,103) of two is to (111,113); Then in the wiring of another layer network, the also walking line (102,104) of two arrives (112,114); Two network layouts are positioned at difference two faces of pot young sheet FPC diaphragm.）。
The secure network that the network layout of described one deck covers in the wiring of another layer network detects contact; (as: network layout of (101,103) to (111,113) will cover 102,104,112,114 4 contacts; (102,104) will cover 101,103,111,113 4 contacts to (112,114) network layout).Because all input and output contacts must in same layer (in order to be connected with the corresponding contact of keyboard pcb board), so wherein the grid line of one deck must go to other one deck by via hole, this via hole is arranged on the limit of contact, also jointly extrudes in scope at the limited post of button rubber and payment terminal shell simultaneously.Like this; secure network detects all being covered by the protecting network wiring of other a group of the contact wherein on a group on FPC diaphragm that interdigitated interlock protection mechanism forms above; like this, the detectable signal of outside will go to attack the protecting network wiring that these contacts will destroy other a group.
Described pot young sheet FPC diaphragm lower surface post simultaneously the young sheet of the pot corresponding with button golden finger on keyboard pcb board (as in Fig. 2 except 11 ' and the circle of empty frame of 22 ' two positions) with for the pot son sheet (11 ' and 22 ' circle of empty frame) of the corresponding safety switch electric contact of short circuit.
As shown in Figure 4, the secure network position that described keyboard pcb board surrounding is corresponding with pot young sheet FPC diaphragm being distributed with at least two same group cross arrangements detects contact, and (as shown in Figure 4, two groups are respectively (201,203) and (211,213); (202,204) and (212,214) cross arrangement);
Described pot young sheet FPC diaphragm is arranged on keyboard pcb board, and pot young sheet FPC diaphragm surrounding distributes, the secure network of two groups of cross arrangements detects the distribute secure network of two groups of cross arrangements of contact and keyboard pcb board surrounding and detects contact and overlap each other (namely (101,103) overlapping with (201,203); (102,104) are overlapping with (202,204); (112,114) are overlapping with (212,214); (111,113) are overlapping with (211,213)), the secure network overlapped each other detects after contact is extruded with the limited post of payment terminal shell jointly by described button rubber and is connected; Namely one four limited posts are had, four angles of the corresponding pot of each limited post young sheet FPC diaphragm surrounding; (as (101,103) and (201,203) extruded with the limited post of payment terminal shell by button rubber after be connected; Be connected after (102,104) and (202,204) are extruded with the limited post of payment terminal shell by button rubber; Be connected after (112,114) and (212,214) are extruded with the limited post of payment terminal shell by button rubber; Be connected after (111,113) and (211,213) are extruded with the limited post of payment terminal shell by button rubber).
In the present invention, on described pot young sheet FPC diaphragm, each secure network detection output contact and each secure network detection input contact are made up of carbon film.These points are not easy soldered like this, and reliably.
Two groups of secure networks of described pot son sheet FPC diaphragm surrounding distribution detect each group secure network detection contact in contacts and diagonally distribute, and two secure networks detect input contacts is positioned on an angle of pot young sheet FPC diaphragm surrounding simultaneously, two secure networks detect straight line that input contact formed become with horizontal line miter angle (as 101 to detect with 103 two secure networks input the straight line that contact formed and become miter angle with horizontal line); Two secure networks detect output contact and are positioned on another angle of pot young sheet FPC diaphragm surrounding simultaneously; Two secure networks detect straight line that output contact formed become with horizontal line miter angle (as 111 to detect with 113 two secure networks input the straight line that contact formed and become miter angle with horizontal line).Like this, there is a contact on any road wherein in the inner part, and a contact in the outer part, think short circuit any road (101 to 111,102 to 112,103 to 113 wherein, 104 to 114), time, an other contact, road all can be caused to disconnect, like this will triggering secure mechanism.Two secure network input contacts in each group and two corresponding output contacts are cross arrangement inside and outside diagonal angle.
In addition, in the present invention, be provided with at least 2 safety switches in the button golden finger protection zone of described keyboard pcb board and detect electric contacts (as shown in Figure 4, safety switch detects electric contact 11 and 22).Described 2 safety switches detect electric contact by button rubber, are connected after the young sheet of the pot for short circuit safety switch signal corresponding under pot young sheet FPC diaphragm (as in Fig. 2 11 ' and 22 ') extrudes jointly with the limited post of payment terminal shell.Described safety switch detects that electric contact any point disconnects all can triggering secure mechanism, and equipment knows sensitive information, and self-destruction.Like this, safety switch detection signal is not easy under attack, is equivalent to duplicate protection (secure network is protected while detecting contact and safety switch detection electric contact mutually).
Here it should be noted that: as shown in Figure 5, two secure networks in the present invention on an angle detect the structural representation of the relative position of contact.Namely two secure networks detect two points on the abscissa of contacts and ordinate does not all have juxtaposition; The benefit of this set is: when assailant implements attack one road secure network test point, inevitable easily make same structure stress point support extruding another one secure network test point disconnect, like this will triggering secure mechanism.(contact namely in two secure network detection contacts is attacked, and another contact will disconnect, due to stressed point-supported extruding)
The keypad security guard method of a kind of payment terminal of the present invention, described method is: the secure network arranging at least two group cross arrangements in the pot son sheet FPC diaphragm surrounding of payment terminal detects contact, and the secure network detection contact of each group comprises at least two secure networks and detects input contacts and two corresponding secure networks detection output contacts; Two secure networks detect input contact and are positioned on an angle of pot young sheet FPC diaphragm surrounding simultaneously, and two secure networks detect output contact and are positioned on another angle of pot young sheet FPC diaphragm surrounding simultaneously;
And two-layer network layout is provided with on pot young sheet FPC diaphragm, and one deck network layout is arranged at pot young sheet FPC diaphragm upper surface, the wiring of another layer network is arranged at the lower surface of pot young sheet FPC diaphragm; The network layout of each layer include two and walking line, two and the starting point of walking line is two secure networks detects input contacts, terminal is that two secure networks detect output contacts, and two and walking line around the surface of panful young sheet FPC diaphragm; The secure network that the network layout of described one deck covers in the wiring of another layer network detects contact; Like this; secure network detects all being covered by the protecting network wiring of other a group of the contact wherein on a group on FPC diaphragm that interdigitated interlock protection mechanism forms above; like this, the detectable signal of outside will go to attack the protecting network wiring that these contacts will destroy other a group.
The secure network that the position that the keyboard pcb board surrounding of payment terminal is corresponding with pot young sheet FPC diaphragm arranges at least two same group cross arrangements detects contact;
And described pot young sheet FPC diaphragm is positioned on keyboard pcb board, make the distribute secure network of two groups of cross arrangements of pot young sheet FPC diaphragm surrounding detect the distribute secure network of two groups of cross arrangements of contact and keyboard pcb board surrounding and detect contact and overlap each other, and be connected after jointly being extruded with the limited post of payment terminal shell by the button rubber of payment terminal; Any one secure network open circuit on described pot young sheet FPC diaphragm or and other secure network short circuit all can triggering secure mechanism, equipment knows sensitive information, and self-destruction.
By the safe processor driver output two groups independently secure network detection signal of payment terminal; secure network through two groups of cross arrangements of keyboard pcb board surrounding detects contact; then contact and corresponding two-tier network wiring is detected by the secure network of same two groups of cross arrangements corresponding on pot young sheet FPC diaphragm; the extruding of limited post is coordinated to form path again; again detection signal is turned back to the safety detection input circuit of safe processor, thus the interdigitated interlock realizing safety detection signal is to protect the safety of keyboard.Like this when the secure network that assailant attacks any a group detects contact, safe processor all can detect signal under fire, and the key automatically removed in keyboard and sensitive information, thus keyboard is protected.
Wherein, on described pot young sheet FPC diaphragm, each secure network detection output contact and each secure network detection input contact are made up of carbon film.These points are not easy soldered like this, and reliably.
Two groups of secure networks of described pot son sheet FPC diaphragm surrounding distribution detect each group secure network detection contact in contacts and diagonally distribute, and two secure networks detection input contacts are positioned on an angle of pot young sheet FPC diaphragm surrounding simultaneously, two secure networks detect the straight line inputting contact formation and become miter angle with horizontal line; Two secure networks detect output contact and are positioned on another angle of pot young sheet FPC diaphragm surrounding simultaneously; The straight line of two secure network detection output contacts formation becomes miter angle with horizontal line.Like this, there is a contact on any road wherein in the inner part, and a contact in the outer part, when thinking short circuit any road wherein, all can cause an other contact, road to disconnect, like this will triggering secure mechanism.Two secure network input contacts in each group and two corresponding output contacts are cross arrangement inside and outside diagonal angle (if the input contact of a road network network is positioned at the outer position at an angle, so corresponding output contact should be positioned at the inner position at diagonal angle).
In addition, in the present invention, at least 2 safety switches are set in the button golden finger protection zone of described keyboard pcb board and detect electric contacts.The straight line that described 2 safety switches detect electric contact formation becomes miter angle with horizontal line.These two safety detection switches be by pot young sheet FPC diaphragm under the young sheet of corresponding pot and mould squeeze flow, as fruit structure disconnects, will triggering secure mechanism.Described 2 safety switches detect electric contact by button rubber, are connected after the young sheet of the pot for short circuit safety switch signal corresponding under pot young sheet FPC diaphragm extrudes jointly with the limited post of payment terminal shell.Described safety switch detects that electric contact any point disconnects all can triggering secure mechanism, and equipment knows sensitive information, and self-destruction.Like this, safety switch detection signal is not easy under attack, is equivalent to duplicate protection (secure network is protected while detecting contact and safety switch detection electric contact mutually).
In addition, in invention, due to same system point squeezing action two safety contacts simultaneously, when assailant attacks the secure network signal of a wherein contact, easily trigger the secure network signal of an other contact.
Safety switch detects the protection that electric contact is subject to secure network detection signal, forms the effect of protection mutually.Any one safety electric contact is wherein triggering secure because being off, and all can cause equipment self-destruction.
Below in conjunction with a specific embodiment, the present invention will be further described:
Refer to shown in Fig. 1 to Fig. 5; the safety switch detection signal of multichannel is had in payment terminal of the present invention; every road safety switch detection signal is all detect electric contact by several safety switches to be in series; these safety switches detect electric contact and are extruded by structure (i.e. limited post) and conductive rubber or the young sheet interaction of pot and be connected; and in the safety switch signal on every road, have a crucial electrical pickoff to be distributed in button golden finger protection zone (as 11 in Fig. 4,22).Pot young sheet FPC diaphragm is adopted to cover (design diagram of diaphragm is as Fig. 1) above the button golden finger protection zone of keyboard pcb board.The surrounding distribution of button golden finger protection zone detects contact according to the secure network of two groups of cross arrangement layouts, and (two groups of respective signal are be (101,103) and (111,113) respectively; (102,104) and (112,114) cross arrangement).The signal of these two groups of contacts, by covering the input and output contact of same cross arrangement placement rule corresponding on the pot young sheet FPC diaphragm above them and corresponding network layout, realizes corresponding input and output contact and connects.Two group network layerings on the young sheet FPC diaphragm of pot, every one deck is all little by a pair spacing, and the line that live width is thin walking line (101,103) arrive (112,114) to (111,113) and (102,104); The secure network of every one deck is all respective around full one deck, and wherein the network layout of one deck must cover the contact of other one deck.The grid line of (101,103) to (111,113) will cover 102,104,112,114 4 contacts; (102,104) will cover 101,103,111,113 4 contacts to (112,114) grid line.Because all input and output contacts on pot young sheet FPC diaphragm must in same layer (in order to be connected with the corresponding contact of keyboard pcb board); so wherein the grid line of one deck must go to other one deck by via hole; this via hole is arranged on the limit of contact, also jointly extrudes in scope at the limited post of button rubber and payment terminal shell simultaneously.Realize two groups of signals mutually to protect.Be distributed in the secure network detection signal contact on pot young sheet FPC diaphragm; wherein two adjacent contacts (a pair (101 in such as Fig. 1 of position, every nook and cranny; 103) (in Fig. 4 a pair (201, adjacent two contacts corresponding to the button golden finger protection zone) and on keyboard pcb board; 203)) coordinating, is all the column type limited post acting in conjunction squeeze flow (namely a limited post withstands two safety detection contacts simultaneously) by same button rubber and shell.Also has the signalling contact of other the three pairs of secure network detection signal contacts on pot young sheet FPC diaphragm and the button golden finger protection zone on corresponding keyboard pcb board, also be all do same process (a pair (102 in Fig. 1 by respective outer side edges, 104)) corresponding (in Fig. 4 a pair (202,204)); (a pair (112,114) in Fig. 1) corresponding (in Fig. 4 a pair (212,214)); (a pair (111,113) in Fig. 1) corresponding (in Fig. 4 a pair (211,213)).If shell unclamps, these points disconnect, will triggering secure mechanism.If assailant attempts to raise the FPC diaphragm covered on keyboard golden finger protection zone by certain means, short circuit 101 and 111 contact, or 102 and 112 contacts, or 103 and 113 contacts, or any road wherein, 104 and 114 contacts.Capital causes other one group of contact to be triggered, because they are intersection collateral arrangement, and a limited post withstands two safety detection contacts simultaneously, has the effect of giving mutual protection.Secure network simultaneously on pot young sheet FPC diaphragm detects contact and adopts carbon film design, and design size is enough little, is not easy under attack.One of them crucial electric contact of the safety switch detection signal on each road is also had to be arranged at button golden finger protection zone all respectively (as 11 in Fig. 4, 22), safety switch on these keyboard pcb boards is detected electric contact and is coordinated by the young sheet of pot of the correspondence on pot young sheet FPC diaphragm and payment terminal shell mechanism and withstand connection, them are made to be connected in series to respective safety switch measure loop, if want to uncap, safety switch under necessary these FPC diaphragms of first short circuit detects electrical pickoff, such mechanism is safer than the original safety detection switch electrical pickoff not by the protection of FPC diaphragm.
By the safe processor driver output two groups independently secure network detection signal of payment terminal; secure network through two groups of cross arrangements of keyboard pcb board surrounding detects contact; then contact and corresponding two-tier network wiring is detected by the secure network of same two groups of cross arrangements corresponding on pot young sheet FPC diaphragm; the extruding of limited post is coordinated to form path again; again detection signal is turned back to the safety detection input circuit of safe processor, thus the interdigitated interlock realizing safety detection signal is to protect the safety of keyboard.Like this when the secure network that assailant attacks any a group detects contact, safe processor all can detect signal under fire, and the key automatically removed in keyboard and sensitive information, thus keyboard is protected.
Here it should be noted that: as shown in Figure 5, two secure networks in the present invention on an angle detect the structural representation of the relative position of contact.Namely two secure networks detect two points on the abscissa of contacts and ordinate does not all have juxtaposition; The benefit of this set is: when assailant implements attack one road secure network test point, inevitable easily make same structure stress point support extruding another one secure network test point disconnect, like this will triggering secure mechanism.(contact namely in two secure network detection contacts is attacked, and another contact will disconnect, due to stressed point-supported extruding)
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (11)
1. a keyboard safety protection device for payment terminal, described device comprises keyboard pcb board, safe processor, button rubber and pot young sheet FPC diaphragm; It is characterized in that: described safe processor is connected with keyboard pcb board;
The secure network that described pot young sheet FPC diaphragm surrounding is distributed with at least two group cross arrangements detects contact, and the secure network detection contact of each group comprises at least two secure networks and detects input contact and two corresponding secure networks detection output contacts; Two secure networks detect input contact and are positioned on an angle of pot young sheet FPC diaphragm surrounding simultaneously, and two secure networks detect output contact and are positioned on another angle of pot young sheet FPC diaphragm surrounding simultaneously;
Described pot young sheet FPC diaphragm is provided with two-layer network layout, and one deck network layout is arranged at pot young sheet FPC diaphragm upper surface, and the wiring of another layer network is arranged at the lower surface of pot young sheet FPC diaphragm; The network layout of each layer include two and walking line, two and the starting point of walking line is two secure networks detects input contacts, terminal is that two secure networks detect output contacts, and two and walking line around the surface of panful young sheet FPC diaphragm;
The secure network that the network layout of described one deck covers in the wiring of another layer network detects contact;
The secure network position that described keyboard pcb board surrounding is corresponding with pot young sheet FPC diaphragm being distributed with at least two same group cross arrangements detects contact;
Described pot young sheet FPC diaphragm is arranged on keyboard pcb board, and pot young sheet FPC diaphragm surrounding distributes, the secure network of two groups of cross arrangements detects the distribute secure network of two groups of cross arrangements of contact and keyboard pcb board surrounding and detects contact and overlap each other, and is connected after jointly being extruded with the limited post of payment terminal shell by described button rubber;
Two groups of secure networks of described pot son sheet FPC diaphragm surrounding distribution detect each group secure network detection contact in contacts and diagonally distribute, and two secure networks detection input contacts are positioned on an angle of pot young sheet FPC diaphragm surrounding simultaneously, two secure networks detect the straight line inputting contact formation and become miter angle with horizontal line; Two secure networks detect output contact and are positioned on another angle of pot young sheet FPC diaphragm surrounding simultaneously; The straight line of two secure network detection output contacts formation becomes miter angle with horizontal line; Two secure network input contacts in each group and two corresponding output contacts are cross arrangement inside and outside diagonal angle.
2. the keyboard safety protection device of payment terminal according to claim 1, is characterized in that: each secure network on described FPC diaphragm detects output contact and each secure network detection input contact is made up of carbon film.
3. the keyboard safety protection device of payment terminal according to claim 1, is characterized in that: be provided with at least 2 safety switches in the button golden finger protection zone of described keyboard pcb board and detect electric contact.
4. the keyboard safety protection device of payment terminal according to claim 3; it is characterized in that: described 2 safety switches detect electric contact by button rubber, be connected after the young sheet of the pot for short circuit safety switch signal corresponding under pot young sheet FPC diaphragm extrudes jointly with the limited post of payment terminal shell.
5. the keypad security guard method of a payment terminal, it is characterized in that: described method is: the secure network arranging at least two group cross arrangements in the pot son sheet FPC diaphragm surrounding of payment terminal detects contact, the secure network detection contact of each group comprises at least two secure networks and detects input contacts and two corresponding secure networks detection output contacts; Two secure networks detect input contact and are positioned on an angle of pot young sheet FPC diaphragm surrounding simultaneously, and two secure networks detect output contact and are positioned on another angle of pot young sheet FPC diaphragm surrounding simultaneously;
And two-layer network layout is provided with on pot young sheet FPC diaphragm, and one deck network layout is arranged at pot young sheet FPC diaphragm upper surface, the wiring of another layer network is arranged at the lower surface of pot young sheet FPC diaphragm; The network layout of each layer include two and walking line, two and the starting point of walking line is two secure networks detects input contacts, terminal is that two secure networks detect output contacts, and two and walking line around the surface of panful young sheet FPC diaphragm; The secure network that the network layout of described one deck covers in the wiring of another layer network detects contact;
The secure network that the position that the keyboard pcb board surrounding of payment terminal is corresponding with pot young sheet FPC diaphragm arranges at least two same group cross arrangements detects contact;
And described pot young sheet FPC diaphragm is positioned on keyboard pcb board, make the distribute secure network of two groups of cross arrangements of pot young sheet FPC diaphragm surrounding detect the distribute secure network of two groups of cross arrangements of contact and keyboard pcb board surrounding and detect contact and overlap each other, and be connected after jointly being extruded with the limited post of payment terminal shell by the button rubber of payment terminal;
By the safe processor driver output two groups independently secure network detection signal of payment terminal, secure network through two groups of cross arrangements of keyboard pcb board surrounding detects contact, then contact and corresponding two-tier network wiring is detected by the secure network of same two groups of cross arrangements corresponding on pot young sheet FPC diaphragm, the extruding of limited post is coordinated to form path again, again detection signal is turned back to the safety detection input circuit of safe processor, thus the interdigitated interlock realizing safety detection signal is to protect the safety of keyboard;
Two groups of secure networks of described pot son sheet FPC diaphragm surrounding distribution detect each group secure network detection contact in contacts and diagonally distribute, and two secure networks detection input contacts are positioned on an angle of pot young sheet FPC diaphragm surrounding simultaneously, two secure networks detect the straight line inputting contact formation and become miter angle with horizontal line; Two secure networks detect output contact and are positioned on another angle of pot young sheet FPC diaphragm surrounding simultaneously; The straight line of two secure network detection output contacts formation becomes miter angle with horizontal line; Two secure network input contacts in each group and two corresponding output contacts are cross arrangement inside and outside diagonal angle.
6. the keypad security guard method of payment terminal according to claim 5, is characterized in that: each secure network on described pot young sheet FPC diaphragm detects output contact and each secure network detection input contact is made up of carbon film.
7. the keypad security guard method of payment terminal according to claim 5, is characterized in that: in the button golden finger protection zone of described keyboard pcb board, arrange at least 2 safety switches detect electric contact.
8. the keypad security guard method of payment terminal according to claim 7; it is characterized in that: described 2 safety switches detect electric contact by button rubber, be connected after the young sheet of the pot for short circuit safety switch signal corresponding under pot young sheet FPC diaphragm extrudes jointly with the limited post of payment terminal shell.
9. the keypad security guard method of payment terminal according to claim 5, it is characterized in that: same system point simultaneously squeezing action two secure networks detects contact, easily triggers the secure network signal of an other contact when assailant attacks the secure network signal of a wherein contact; Detect in contact at the secure network of two groups of cross arrangements of surrounding; the secure network of any two intersection collateral arrangement of short circuit detects contact and other one group of contact all can be caused to trigger; and a limited post withstands two safety detection contacts, has the effect of giving mutual protection simultaneously.
10. the keypad security guard method of payment terminal according to claim 7, is characterized in that: safety switch detects the protection that electric contact is subject to secure network detection signal, forms the effect of protection mutually; Any one safety electric contact is wherein triggering secure because being off, and all can cause equipment self-destruction.
The keypad security guard method of 11. payment terminals according to claim 5; it is characterized in that: when the secure network that assailant attacks any a group detects contact; safe processor all can detect signal under fire; and the key automatically removed in keyboard and sensitive information, thus keyboard is protected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310576172.9A CN103617908B (en) | 2013-11-15 | 2013-11-15 | The keyboard safety protection device of payment terminal and method |
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| CN201310576172.9A CN103617908B (en) | 2013-11-15 | 2013-11-15 | The keyboard safety protection device of payment terminal and method |
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| CN103617908A CN103617908A (en) | 2014-03-05 |
| CN103617908B true CN103617908B (en) | 2015-11-04 |
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| CN103942877B (en) * | 2014-03-07 | 2016-07-06 | 东方通信股份有限公司 | ATM user's keyboard |
| EP3195182B1 (en) * | 2014-09-16 | 2021-09-29 | Verifone, Inc. | Secure smartcard reader |
| CN104201028B (en) * | 2014-09-30 | 2019-05-07 | 太阳神(珠海)电子有限公司 | A kind of film press-key structure and membrane keyboard with security confidentiality function |
| CN104465185A (en) * | 2014-11-19 | 2015-03-25 | 深圳长城开发科技股份有限公司 | Keyboard cover keyboard protection device |
| CN105956497A (en) * | 2016-04-25 | 2016-09-21 | 福建新大陆支付技术有限公司 | Safety anti-dismounting method for financial electronic device and structure thereof |
| CN106599670A (en) * | 2016-12-25 | 2017-04-26 | 长沙修恒信息科技有限公司 | Modular multifunctional host and system |
| CN112053515B (en) * | 2020-08-07 | 2022-12-09 | 福建联迪商用设备有限公司 | Intelligent POS terminal data protection structure and protection method |
| CN112669544A (en) * | 2020-12-21 | 2021-04-16 | 福建新大陆支付技术有限公司 | Novel safety cover plate wiring method and application thereof |
| CN114281007B (en) * | 2022-03-07 | 2022-05-24 | 坤泰车辆系统(常州)股份有限公司 | Electronic parking brake controller with peep-proof function and peep-proof method thereof |
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