CN103955997A - Cryptographic device - Google Patents
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- CN103955997A CN103955997A CN201410187731.1A CN201410187731A CN103955997A CN 103955997 A CN103955997 A CN 103955997A CN 201410187731 A CN201410187731 A CN 201410187731A CN 103955997 A CN103955997 A CN 103955997A
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- liquid crystal
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- scrambler
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Abstract
The invention discloses a cryptographic device which comprises a front shell and a rear shell; in a space formed by the front shell and the rear shell, a touch screen, a liquid crystal screen and a main circuit board are arranged on the front shell and/or the rear shell in sequence in parallel, wherein the touch screen is arranged close to the front shell, and the main circuit board is arranged close to the rear shell, and a processor is arranged on the main circuit board and is close to the rear shell; the processor generates and transmits a dynamic backlight control signal to the liquid crystal screen and is used for dynamically controlling the backlight display intensity of the liquid crystal screen. The cryptographic device has the benefits that as the touch screen is adopted to collect and input a password, the operation of a user is facilitated; am enclosure and an anti-peeping cover need not to be used, so that the operation of the user can be further facilitated; and through dynamically controlling the backlight display intensity of the liquid crystal screen, the focusing of secret photographing equipment can be disturbed, so that the secret photography is effectively prevented, as a result, the safety is high.
Description
Technical field
The invention belongs to E-Payment technical field, specifically, relate to a kind of scrambler.
Background technology
Scrambler has been widely used in the fields such as bank, finance and third party's payment at present, is generally used for and gathers the encrypted message that user inputs in process of exchange.
At present, most of scramblers all adopt key board, and during input password, user need to firmly press corresponding button, are not easy to very much user's operation.
Present scrambler to be spied upon or is taken on the sly in order to prevent, a top larger watching shield cover of general design of scrambler blocks, and it realizes the sight line that peep-proof has also affected user simultaneously, to user, uses and makes troubles.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of scrambler, adopt touch-screen Gather and input password, easy to use, by the backlight demonstration intensity to liquid crystal display, dynamically control, can disturb the focusing of the equipment of taking on the sly, effectively prevent from taking on the sly, safe.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of scrambler, comprise fore shell, back cover, in the space that described fore shell and back cover form, be parallel to described fore shell and/or described back cover is disposed with touch-screen, liquid crystal display and main circuit board, wherein, described touch-screen is near described fore shell setting, described main circuit board is near described back cover setting, and described processor is arranged on described main circuit board and near described back cover; Described processor produces dynamic backlight control signal and is sent to liquid crystal display, for the backlight demonstration intensity to liquid crystal display, dynamically controls.
Further, described processor is added to backlight control signal on the pulse-width signal that dutycycle and/or frequency accidental change, and produces dynamic backlight control signal.
Further, described processor produces dynamic color control signal and is sent to liquid crystal display, for the backlight Show Color to liquid crystal display, dynamically controls.
Further, between described liquid crystal display and described main circuit board, be provided with the first trigger unit.
Further again, described the first trigger unit comprises and is arranged on described liquid crystal display near at least one conductive structure on described main circuit board one side surface, described main circuit board is provided with near a side of liquid crystal display the first contact being electrically connected to described conductive structure, and described the first contact is electrically connected to safe processor.
Preferably, described the first contact is dressing interdigital structure.
Further, between described back cover and main circuit board, be provided with the second trigger unit.
Further again, described the second trigger unit comprises that at least one second contact and at least one top are provided with the projection of electric conductor, described the second contact is arranged on main circuit board near described back cover one side, and described projection is arranged on back cover, and described electric conductor is electrically connected to described the second contact.
Further, described scrambler also comprises FPC circuit board, described FPC circuit board pastes on the inwall of described back cover, and the side near described back cover on described main circuit board arranges at least one installation thimble, and described at least one installation thimble contacts with described FPC circuit board.
Preferably, described liquid crystal display at least comprises display field and instruction input field, and after described liquid crystal display powers on, described display field and/or described instruction input field are bright.
Further, described touch-screen is supported keyboard input and/or handwriting input, and described liquid crystal display adopts display keyboard interface and/or signature interface.
Compared with prior art, advantage of the present invention and good effect are: scrambler of the present invention adopts touch-screen Gather and input password, and during input password, user, without firmly pressing respective keys, only touches touch-screen, and user is easy to operate; By the backlight demonstration intensity to liquid crystal display, dynamically control, can disturb the focusing of the equipment of taking on the sly, effectively prevent from taking on the sly, safe.
Read by reference to the accompanying drawings after the detailed description of embodiment of the present invention, it is clearer that the other features and advantages of the invention will become.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of embodiment external structure schematic diagram of scrambler proposed by the invention;
Fig. 2 is the interior volume cross section view that in Fig. 1, fore shell and back cover form;
Fig. 3 is the structural representation of liquid crystal display in scrambler of the present invention;
Fig. 4 is the structural representation of middle main circuit board one side of scrambler of the present invention;
Fig. 5 is the cross section view of the safeguard protection contact of scrambler back cover of the present invention, main circuit board and liquid crystal display;
Fig. 6 is the cut-open view of back cover in Fig. 5;
Fig. 7 is the structural representation of the other side of main circuit board in scrambler of the present invention;
Fig. 8 is FPC circuit board and back cover assembling process schematic diagram in scrambler of the present invention;
Fig. 9 is that in scrambler of the present invention, FPC circuit board is assemblied in the structural representation on back cover;
Figure 10 is the viewing area schematic diagram of liquid crystal display in scrambler of the present invention;
Figure 11 is the keyboard interface schematic diagram that in scrambler of the present invention, liquid crystal display shows;
Figure 12 is the out of order rear interface schematic diagram of keyboard in Figure 11;
Figure 13 is the signature interface schematic diagram that in scrambler of the present invention, liquid crystal display shows.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment mono-
Fig. 1 is the external structure schematic diagram of the present embodiment scrambler, Fig. 2 is the interior volume cross section view that in Fig. 1, fore shell and back cover form, shown in Fig. 1, Fig. 2, the scrambler of the present embodiment comprises fore shell 101, back cover 102, in the space that fore shell 101 and back cover 102 forms, be parallel to fore shell 101 and/or back cover 102 is disposed with touch-screen 103, liquid crystal display 104 and main circuit board 105, wherein, touch-screen 103 arranges near fore shell 101, main circuit board 105 arranges near back cover 102, and processor 106 is arranged on main circuit board 105 and near back cover 102; Processor 106 produces dynamic backlight control signal and is sent to liquid crystal display 104, for the backlight demonstration intensity to liquid crystal display 104, dynamically controls.Scrambler employing touch-screen Gather and input information due to the present embodiment, overcome the problem of the input inconvenience of mechanical key existence, by the backlight demonstration intensity to liquid crystal display, dynamically control, can make the backlight of liquid crystal display show that dynamic changes of strength changes, can disturb the focusing of the equipment of taking on the sly like this, effectively prevent from taking on the sly, and then improve the security of process of exchange.
As a preferred embodiment, the method that processor produces dynamic backlight control signal is: processor sends backlight control signal to backlight drive circuit, and then the light on and off of control liquid crystal display LED, dynamic backlight in the present embodiment is controlled, by PWM controller being set at processor end, on the I/O port that PWM controller output signal the processor that is added to transmit control signal to backlight drive circuit, when not needing dynamic backlight to control, PWM controller output high level, be presented as the static demonstration of liquid crystal display, when user inputs password by touch-screen, processor is random to be produced a control signal and sends to PWM controller, the pwm signal of PWM controller output frequency and/or dutycycle random variation, the frequency of pwm signal is presented as that the backlight of liquid crystal display shows dynamic changes of strength change frequency, the dutycycle of pwm signal is presented as that the backlight of liquid crystal display shows intensity, finally realize the variation of the whole light and shade of liquid crystal display 104, owing to taking pictures, need to focus when taking with photographic goods, its principle is to focus according to the bright intensity of target, by controlling the backlight of liquid crystal display 104, show that the period of change of intensity is less than the time shutter of capture apparatus, can cause capture apparatus always in focusing state, also the shooting of cannot focusing smoothly, just can not take clear photograph and image in this case, therefore the scrambler of the present embodiment can well defend the equipment of taking on the sly to take on the sly.In addition, in working control, also need to consider the adaptability of human eye and the time of comfort level and Password Input, make the design of this scrambler more reasonable.In addition, described processor produces dynamic color control signal and is sent to liquid crystal display, for the backlight Show Color to liquid crystal display, dynamically controls.Concrete control method is: processor sends color control signal to RGB driving circuit, and then the Show Color of control liquid crystal display LED, dynamic color in the present embodiment is controlled, by PWM controller being set at processor end, on the I/O port that PWM controller output signal the processor that is added to transmit control signal to RGB driving circuit, when not needing dynamic color to control, PWM controller output high level, be presented as that liquid crystal display single color shows, when user inputs password by touch-screen, processor is random to be produced a control signal and sends to PWM controller, the pwm signal of PWM controller output frequency and/or dutycycle random variation, the frequency of pwm signal is presented as the backlight color dynamic change frequency of liquid crystal display, the dutycycle of pwm signal is presented as the backlight display color of liquid crystal display, finally realize the dynamic change of the overall color of liquid crystal display 104, the backlight display color of liquid crystal display is carried out to dynamic control and can play the effect that further interference capture apparatus is taken.
It should be noted that, when liquid crystal display being carried out to dynamic backlight control and dynamic color control simultaneously, PWM controller only need arrange one, this PWM controller produces two paths of signals and is respectively used to dynamic backlight control and dynamic color control, certainly, two PWM controllers also can be set, be respectively used to dynamic backlight control and dynamic color control.
Embodiment bis-
For fear of scrambler, be subject to the attack such as physical arrangement aspects such as disassembling, the present embodiment has provided another embodiment, shown in Fig. 5 and Fig. 2, the scrambler of the present embodiment by being provided with the first trigger unit 2 between liquid crystal display 104 and main circuit board 105, this first trigger unit 2 is electrically connected to the processor 106 on main circuit board 105, forms signal circuit.When being subject to external force, disassembles while attacking liquid crystal display 104, the first trigger unit 2 forms trigger pip, the first trigger unit 2 is sent to processor 106 by the trigger pip of formation, the trigger pip that processor 106 sends according to the first trigger unit 2 judges whether scrambler is subject to external attack, if confirm that scrambler is subject to external attack, processor 106 can also be carried out other operations, for example, processor 106 can be wiped inner at least part of sensitive data (as the encrypted message of user's input), now, the sensitive data of processor 106 inside also cannot be stolen, can and not crack by illegal copies.
Fig. 3 is that the liquid crystal display 104 of scrambler is near main circuit board 105 1 side surface views, Fig. 4 is that main circuit board 105 is near liquid crystal display 104 1 side surface views, as a preferred embodiment, in the present embodiment, shown in Fig. 3, Fig. 4, the first trigger unit 2 comprises and is arranged on liquid crystal display 104 near at least one conductive structure 201 on main circuit board 105 1 side surfaces, and main circuit board 105 is provided with 202, the first contacts 202, the first contact near a side of liquid crystal display 104 and is electrically connected to processor 106.After scrambler assembles, under normal condition, at fore shell 101, under the effect of back cover 102 and liquid crystal display 104, the first contact 202 is electrically connected to conductive structure 201, the treated device 106 of trigger pip that comes from processor 106, the first contact 202, and conductive structure 201 forms closed signal circuit, when being subject to external force, disassembles while attacking liquid crystal display 104, the first contact 202 disconnects and being electrically connected to conductive structure 201, corresponding signal circuit is disconnected, because the signal transmitting in signal circuit comes from processor 106, once disconnect, using the trigger pip as processor 106, corresponding triggering processor 106 is erased to small part sensitive data, the scrambler of the present embodiment can effectively prevent the attack of disassembling to liquid crystal display.
In the present embodiment, in order to facilitate the installation of conductive structure 201 and the location of the first contact 202, preferably be arranged on the position, four angles of liquid crystal display, fixed form can adopt to paste and fix, certainly, the desired location of conductive structure 201 is circumscribed not, and conductive structure 201 also can be arranged at liquid crystal display 104 near any position of main circuit board 105 1 side surfaces, conductive structure 201 also circumscribed not of number is set, in actual production, can determine position and number according to concrete project organization.Fixed form is also not limited to paste fixing, can also adopt as fixed forms such as clamping, bolt are fixed, gripped, heat seal is fixing.In addition, the material of conductive structure 201 preferably adopts has flexible conductive rubber, can prevent such as causing the first contact 202 to be electrically connected to and to cause erroneous judgement to occur with conductive structure 201 moments disconnection owing to suddenly clashing into when scrambler falls, certainly, the restriction that the material of conductive structure 201 is not given an example by the present embodiment, also can adopt other to there is flexible conductive material, as spring thimble, spring is led pad etc. and is had flexible metal conductive materials, in the situation that not considering that causing the first contact 202 to be electrically connected to conductive structure 201 moments disconnection causes erroneous judgement, can also adopt and not there is flexible conductive material and/or conductive structure.
The first contact 202 preferably adopts pectination interdigital electrode as shown in Figure 4, this pectination interdigital electrode structure, can between the very near electrode of spacing, adopt as far as possible large contact area, such as, when the factors such as scrambler is clashed into suddenly cause conductive structure 201 to be just electrically connected to disconnection with the first contact 202 from a side, due to pectination interdigital electrode structure, still can realize conductive structure 201 is electrically connected in an other side with the first contact 202, therefore improved the anti-noise ability of scrambler, reduced erroneous judgement event and occur.It should be noted that, the first contact 202 is not limited to given an example pectination interdigital electrode, and other can be realized the electrode structure being electrically connected to conductive structure 201 and all belong to protection scope of the present invention.
When comprising a plurality of the first contacts 202 and/or conductive structure 201, the first all contacts 202 and/or conductive structure 201 can be electrically connected and be connected into a bars loop, also can be electrically connected and be connected into many independently signal circuits, the signal transmitting in all signal circuits all comes from processor 106, and the number of signal circuit is arranged according to actual needs and laid.
Embodiment tri-
Housing for fear of scrambler is subject to the attack such as physical arrangement aspects such as disassembling, the present embodiment has provided a kind of embodiment, shown in Figure 5, the scrambler of the present embodiment by being provided with the second trigger unit 3 between back cover 102 and main circuit board 105, this second trigger unit 3 is electrically connected to the processor on electric main road plate 105, forms signal circuit.When fore shell 101 and/or back cover 102 are disassembled while attacking; the second trigger unit 3 forms trigger pip; the second trigger unit 3 is sent to processor by the trigger pip of formation; processor is wiped inner at least part of sensitive data (as the encrypted message of user's input) like this, can play the effect of the inner sensitive data of conservation treatment device.
The present embodiment gives a kind of a kind of preferred implementation of the second trigger unit 3, Fig. 6 is the cut-open view of back cover 102 in the present embodiment, Fig. 7 be in the present embodiment main circuit board 105 near the view of back cover 102 1 sides, shown in Fig. 6, Fig. 7, the second trigger unit 3 comprises that at least one the second contact 301 and at least one top are provided with the projection 302 of electric conductor, the second contact 301 is arranged on main circuit board 105 near on back cover 102 1 sides, and projection 302 is arranged on back cover 102.Under normal condition, after fore shell 101 and back cover 102 assemble, electric conductor 303 is electrically connected to the second contact 301, the treated device of trigger pip that comes from processor, the second contact 301, and electric conductor 303 forms closed signal circuit, when fore shell 101 and/or back cover 102 are disassembled while attacking, electric conductor 303 can disconnect and being electrically connected to the second contact 301, corresponding signal circuit is disconnected, because the signal transmitting in signal circuit comes from processor, once disconnect, using the trigger pip as processor, corresponding triggering processor is erased to small part sensitive data, can play the effect of the inner sensitive data of conservation treatment device, the scrambler of the present embodiment can effectively prevent the attack of disassembling to fore shell 101 and/or back cover 102.
In order to facilitate electric conductor 303 to be assemblied on projection 302, it is E character form structure that electric conductor 303 preferably adopts longitudinal profile as shown in Figure 6, its material can adopt the flexible conductive rubber that has of giving an example in embodiment bis-, can very easily electric conductor 303 be assemblied on projection 302, in addition, adopt flexible conductive rubber, can also prevent such as causing electric conductor 303 to be electrically connected to and to cause erroneous judgement to occur with the second contact 301 moments disconnection owing to suddenly clashing into when scrambler falls.The desired location of projection 302 on back cover 102 be circumscribed not, can be arranged at back cover 102 near any position of main circuit board 105 1 side surfaces, projection 302 also circumscribed not of number is set, in actual production, can determine position and number according to concrete project organization.The material of electric conductor 303 and fixed form are all not limited to the present embodiment and give an example, and specifically can, referring to other implementations of conductive structure 201 in embodiment bis-, at this, not repeat.
The second contact 301 preferably adopts pectination interdigital electrode as shown in Figure 7, the advantage of this pectination interdigital electrode structure is described in detail in embodiment bis-, at this, do not repeat, the second contact 301 adopts pectination interdigital electrode structure will produce same good effect, when the factors such as scrambler is clashed into suddenly cause electric conductor 303 to be just electrically connected to the second contact 301 disconnections from a side, due to pectination interdigital electrode structure, still can realize electric conductor 303 keeps being electrically connected in an other side with the second contact 301, therefore improved the anti-noise ability of scrambler, reducing erroneous judgement event occurs.It should be noted that, the second contact 301 is not limited to given an example pectination interdigital electrode, and other can be realized the electrode structure being electrically connected to electric conductor 303 and all belong to protection scope of the present invention.
When comprising a plurality of the second contacts 301 and/or electric conductor 303, the second all contacts 301 and/or electric conductor 303 can be electrically connected and be connected into a bars loop, also can be electrically connected respectively and be connected into many independently signal circuits, the signal transmitting in all signal circuits all comes from processor, and the number of signal circuit is arranged according to actual needs and laid.
Embodiment tetra-
For fear of the back cover 102 of scrambler be subject to such as digging a hole, hole, the attack of the aspect such as cutting; when there is the attack of this kind of mode; if do not take safeguard measure; main circuit board 105 and processor will be exposed; be easy to be surveyed; the present embodiment has provided another embodiment, can defend the attack of this kind of mode.
Shown in Figure 8, the scrambler of the present embodiment also comprises FPC circuit board 4, FPC circuit board 4 pastes on the inwall of back cover 102, shown in Figure 5, a side near back cover 102 on main circuit board 105 arranges at least one installation thimble 107, in FPC circuit board 4, be furnished with line trigger signal, this at least one installation thimble 107 is electrically connected to the line trigger signal on FPC circuit board 4.And thimble 107 is installed and is electrically connected to the processor on electric main road plate 105, form signal circuit.Back cover 102 is dug a hole or is holed while attacking; be easy to be corrupted to the line trigger signal on FPC circuit board 4; cause signal circuit to open circuit; can corresponding formation trigger pip trigger processor; be erased to small part sensitive data; can play the effect of the inner sensitive data of conservation treatment device, the scrambler of the present embodiment can effectively prevent to back cover 102 dig a hole, the attack of boring aspect.
As a preferred embodiment, shown in Figure 9, FPC circuit board 4 is provided with the thimble contact 401 being electrically connected to line trigger signal, under normal condition, after FPC circuit board 4 and main circuit board 105 assemble, as shown in Figure 7, back cover 102 at scrambler, under the pressure of liquid crystal display 104 other structures such as grade, thimble 107 is installed to be electrically connected to thimble contact 401, the treated device of trigger pip that comes from processor, thimble 107 is installed, and thimble contact 401 forms closed signal circuit in line trigger signal, because FPC circuit board 4 is attached on back cover 102, when back cover 102 is attacked, may cause signal circuit to disconnect, then processor is carried out corresponding action, protected sensitive data.Wherein, FPC circuit board 4 preferably adopts opaque epoxy resin to fix, and can avoid the optical detection to line trigger signal.When taking the technical scheme of the present embodiment and projection 302 architectural feature in embodiment tri-simultaneously, corresponding for projection 302 has cavity 402 on FPC circuit board 4, for projection 302, therefrom pass.Number and the position of the installation thimble 107 in the present embodiment are also unrestricted, can arrange according to actual needs.
Embodiment five
In order to solve current scrambler, need to establish in addition the problem that handwriting pad is realized handwritten signature input, the scrambler of the present embodiment provides another embodiment, can support hand-write input function.
Shown in Figure 10, liquid crystal display 104 at least comprises display field 104a and instruction input field 104b, and after liquid crystal display 104 powers on, display field 104a and/or described instruction input field 104b are bright.Wherein, touch-screen 105 is supported keyboard input and/or handwriting input, and liquid crystal display 104 adopts display keyboard interface and/or signature interface.Shown in Figure 11, for display keyboard interface, shown in Figure 13, for showing signature interface.User can be switched two kinds of input patterns by switching key, has realized the handwritten signature input function of scrambler, without handwriting pad is set in addition again.
In addition, when liquid crystal display 104 is shown as display keyboard interface, for prevent by input during password hand-type spy upon analysis, the keyboard interface of this scrambler adopts the out of order demonstration design of button, also be that the numeric key arrangement order that processor shows liquid crystal display is upset demonstration at random, as given in Figure 12 wherein a kind of displaying scheme after out of order, because numeric key arrangement order is controlled and arranged by processor, when therefore user presses respective digital, processor accurately Treatment Analysis goes out pressed numeral.
Certainly; above-mentioned explanation is not limitation of the present invention; the present invention is also not limited in above-mentioned giving an example, and the variation that those skilled in the art make in essential scope of the present invention, remodeling, interpolation or replacement, also should belong to protection scope of the present invention.
Claims (10)
1. a scrambler, comprise fore shell, back cover, it is characterized in that, in the space that described fore shell and back cover form, be parallel to described fore shell and/or described back cover is disposed with touch-screen, liquid crystal display and main circuit board, wherein, described touch-screen is near described fore shell setting, and described main circuit board is near described back cover setting, and described processor is arranged on described main circuit board and near described back cover; Described processor produces dynamic backlight control signal and is sent to liquid crystal display, for the backlight demonstration intensity to liquid crystal display, dynamically controls.
2. scrambler according to claim 1, is characterized in that, described processor is added to backlight control signal on the pulse-width signal that dutycycle and/or frequency accidental change, and produces dynamic backlight control signal.
3. scrambler according to claim 2, is characterized in that, described processor produces dynamic color control signal and is sent to liquid crystal display, for the backlight Show Color to liquid crystal display, dynamically controls.
4. scrambler according to claim 1, is characterized in that, between described liquid crystal display and described main circuit board, is provided with the first trigger unit.
5. scrambler according to claim 4, it is characterized in that, described the first trigger unit comprises and is arranged on described liquid crystal display near at least one conductive structure on described main circuit board one side surface, described main circuit board is provided with near a side of liquid crystal display the first contact being electrically connected to described conductive structure, and described the first contact is electrically connected to safe processor.
6. scrambler according to claim 1, is characterized in that, is provided with the second trigger unit between described back cover and main circuit board.
7. scrambler according to claim 6, it is characterized in that, described the second trigger unit comprises that at least one second contact and at least one top are provided with the projection of electric conductor, described the second contact is arranged on main circuit board near described back cover one side, described projection is arranged on back cover, and described electric conductor is electrically connected to described the second contact.
8. according to the scrambler described in claim 1-7 any one, it is characterized in that, described scrambler also comprises FPC circuit board, described FPC circuit board pastes on the inwall of described back cover, a side near described back cover on described main circuit board arranges at least one installation thimble, and described at least one installation thimble contacts with described FPC circuit board.
9. according to the scrambler described in claim 1-7 any one, it is characterized in that, described liquid crystal display at least comprises display field and instruction input field, and after described liquid crystal display powers on, described display field and/or described instruction input field are bright.
10. scrambler according to claim 1, is characterized in that, described touch-screen is supported keyboard input and/or handwriting input, and described liquid crystal display adopts display keyboard interface and/or signature interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410187731.1A CN103955997A (en) | 2014-05-06 | 2014-05-06 | Cryptographic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410187731.1A CN103955997A (en) | 2014-05-06 | 2014-05-06 | Cryptographic device |
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| Publication Number | Publication Date |
|---|---|
| CN103955997A true CN103955997A (en) | 2014-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410187731.1A Pending CN103955997A (en) | 2014-05-06 | 2014-05-06 | Cryptographic device |
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| CN107636674A (en) * | 2017-08-02 | 2018-01-26 | 福建联迪商用设备有限公司 | Liquid crystal touch screen safety protection structure, guard method and financial payment equipment |
| WO2019023977A1 (en) * | 2017-08-02 | 2019-02-07 | 福建联迪商用设备有限公司 | Safety protection structure and method for liquid crystal touch screen, and financial payment device |
| CN107636674B (en) * | 2017-08-02 | 2020-11-24 | 福建联迪商用设备有限公司 | Liquid crystal touch screen safety protection structure, liquid crystal touch screen safety protection method and financial payment equipment |
| CN110944115A (en) * | 2019-12-12 | 2020-03-31 | 河南大学 | Automatic out-of-focus method for preventing illegal shooting |
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