CN204926090U - Control system based on developments password and USBKEY - Google Patents
Control system based on developments password and USBKEY Download PDFInfo
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- CN204926090U CN204926090U CN201520556434.XU CN201520556434U CN204926090U CN 204926090 U CN204926090 U CN 204926090U CN 201520556434 U CN201520556434 U CN 201520556434U CN 204926090 U CN204926090 U CN 204926090U
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- 238000004891 communication Methods 0.000 claims description 14
- 238000002955 isolation Methods 0.000 claims description 5
- 230000002452 interceptive effect Effects 0.000 claims description 4
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- 230000005059 dormancy Effects 0.000 abstract description 3
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Abstract
The utility model relates to a data transaction technical field, the utility model provides a control system based on developments password and USBKEY, control system include dynamic password control chip, USB control chip, USB interface, battery and detection circuitry, when detection circuitry detects USB interface connection external equipment, to dynamic password control chip output detection signal, developments password control chip got into state of dormancy when receiving the detected signal, the battery is the power supply of dynamic password control chip to when dynamic password control chip gets into state of dormancy, reduce the power supply electric quantity to dynamic password control chip, to start working as USB control chip, dynamic password chip is by battery powered, and dynamic password control chip gets into the low -power consumption state, and each other noninterference of dynamic password control chip and USB control chip's confession ferroelectric phase, avoids switching supplying power to USB and leads to dynamic password control chip probably to lose the defect of the content that presets.
Description
Technical field
The utility model relates to data trade technical field, particularly relates to a kind of control system based on dynamic password and USBKEY.
Background technology
OTP full name is One-timePassword, also dynamic password is claimed, to generate one every 60 seconds with time correlation according to special algorithm, uncertain random digit combination, each password can only use once, OTP comes to divide technically three kinds of forms, time synchronized, event synchronization and challenge/response, the operational line that challenge/response type OTP is usually used in, website/response exports the challenge code that service end issues, dynamic token inputs this challenge code, by built-in algorithm generating the random digit of 6/8, password is once effective, due to needs input challenge code, need to increase numeric keypad.
Have at the same time in prior art on the equipment complex of OTP function and USBKEY function, display screen and button is controlled by OTP control chip, when using USB interface, USB main control chip is by extra PORT COM and OTP chip communication, the content that will show is sent to OTP control chip shown by display screen, key information imports USB main control chip into by OTP control chip.When using USB pattern, OTP control chip and the communication of USB main control chip, under OTP control chip needs to be operated in higher speed, two kinds of power supply modes are had in prior art, a kind of use OTP control chip powered battery, the battery electric quantity of OTP control chip can be consumed like this under USB pattern, in order to ensure there is enough service time when using OTP pattern, just need the capacity increasing battery, add battery cost, and once for a long time equipment connection under the state of USB interface, battery may exhaust; Another kind of mode automatically switches to USB interface when USB pattern to power, and this mode is except needing complicated commutation circuit, and the instability of USB interface voltage may cause OTP control chip to reset, thus makes OTP disabler.These two kinds of modes, all can frequent starting OTP control chip when using usb function, when communication makes mistakes, the operation irregularity of OTP control chip may be caused, cause OTP pattern to use, if OTP chip operation is abnormal, USB pattern also possibly cannot work.In sum, exist when using USB pattern switching to be powered by USB interface in prior art, the instability of powering due to USB interface makes OTP control chip may lose preset content and needs to increase the problem of battery capacity.
Utility model content
The purpose of this utility model is to provide a kind of control system based on dynamic password and USBKEY, be intended to solve for exist in prior art use USB pattern switching to be powered by USB interface time, the instability of powering due to USB interface makes OTP control chip may lose preset content and needs to increase the problem of battery capacity.
The utility model is achieved in that first aspect provides a kind of control system based on dynamic password and USBKEY, and described control system comprises dynamic password control chip, USB control chip, USB interface, battery and testing circuit;
The input end of described testing circuit connects described USB interface, first output terminal of described testing circuit connects the state-detection end of described dynamic password control chip, described testing circuit detect USB interface connect external unit time, to described dynamic password control chip output detections signal;
Described dynamic password control chip enters dormant state when receiving described detection signal;
Described battery connects the power input of described dynamic password control chip, and described battery is that described dynamic password control chip is powered;
The input/output terminal of described USB control chip connects described USB interface, and described USB control chip carries out interactive communication by described USB interface and described external unit.
In conjunction with first aspect, in the first possible implementation of first aspect, described control system also comprises keyboard circuit;
Described keyboard circuit comprises multiple button, many first signal wires and many secondary signal lines, described many first signal wires and the cross arrangement of many secondary signal lines, each button connects first signal wire and a secondary signal line, described many first signal wires are connected multiple input ends of described dynamic password control chip with described many secondary signal lines, and at least one secondary signal line in described many secondary signal lines connects the input end of described USB control chip;
Second output terminal of described testing circuit connects first signal wire in described keyboard circuit, described testing circuit is when described USB interface connects external unit, adjust the level state of the first signal wire that it connects, make described USB control chip receive the key information of described keyboard.
In conjunction with in the first possible implementation of first aspect, in the implementation that the second of first aspect is possible, described dynamic password control chip is also for when detecting that described USB interface scans button when not connecting external unit, and when receiving off signal or exceed preset value sweep time, enter dormant state.
In conjunction with first aspect, in the third possible implementation of first aspect, described testing circuit comprises the first resistance, the second resistance and switching tube;
The first end of described first resistance connects the power end of described USB interface, second end of described first resistance connects the first end of described second resistance and the control end of described switching tube, second end of described second resistance is connected altogether with the input end of described switching tube, the control end of described switching tube is the first output terminal of described testing circuit, and the output terminal of described switching tube is the second output terminal of described testing circuit.
In conjunction with in the implementation that the second of first aspect is possible, in the 4th kind of possible implementation of first aspect, also buffer circuit is provided with between described USB control chip and described keyboard circuit, described buffer circuit comprises one way conducting device and pull-up resistor, the input end of described one way conducting device connects the first end of described pull-up resistor, the output terminal of described one way conducting device forms an output terminal of described buffer circuit, the first end of each pull-up resistor connects an input end corresponding to described USB control chip, second end of described each pull-up resistor connects direct supply.
In conjunction with first aspect, in the 5th kind of possible implementation of first aspect, described control system also comprises display screen, and the output terminal of described dynamic password control chip is connected the input end of described display screen with the output terminal of described USB control chip;
Described dynamic password control chip, when detecting that described USB interface connects external unit, stops driving described display screen and entering dormant state;
USB interface described in described USB control chip controls described display screen when connecting external unit.
In conjunction with first aspect, in the 6th kind of possible implementation of first aspect, between each input end of the described display screen that each output terminal of described USB control chip is connected with it, be provided with isolation resistance.
A kind of control system based on dynamic password and USBKEY that the utility model provides, by arranging testing circuit, when dynamic password control chip is in running order, dynamic password chip is battery-powered, when testing circuit detects USB interface access external unit, USB control chip is started working, dynamic password control chip enters dormant state automatically, dynamic password control chip is still powered by battery, because dynamic password control chip enters low power consumpting state, the powering quantity of battery can be saved, and dynamic password control chip does not interfere with each other mutually with the power supply of USB control chip, avoid can in prior art dynamic password control chip when USB interface access external unit, USB can be switched to power the defect causing dynamic password control chip may lose preset content, the power supply achieving dynamic password control chip and USB control chip is independent, and do not need communication between USB control chip and dynamic password control chip, decrease size of code and debugging efforts.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of control system based on dynamic password and USBKEY that a kind of embodiment of the utility model provides;
Fig. 2 is the structural representation of a kind of control system based on dynamic password and USBKEY that the another kind of embodiment of the utility model provides;
Fig. 3 is a kind of circuit diagram based on the keyboard circuit in the control system of dynamic password and USBKEY and isolation detection circuit that the another kind of embodiment of the utility model provides;
Fig. 4 is the structural representation of a kind of control system based on dynamic password and USBKEY that the another kind of embodiment of the utility model provides;
Fig. 5 be the another kind of embodiment of the utility model provide a kind of based on the display screen circuit diagram in the control system of dynamic password and USBKEY;
Fig. 6 is the process flow diagram of a kind of control method based on dynamic password and USBKEY that a kind of embodiment of the utility model provides.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
In order to the technical solution of the utility model is described, be described below by specific embodiment.
A kind of embodiment of the utility model provides a kind of control system based on dynamic password and USBKEY, and as shown in Figure 1, control system comprises dynamic password control chip 101, USB control chip 102, usb 1 04, battery 103 and testing circuit 105.
The input end of testing circuit 105 connects usb 1 04, first output terminal of testing circuit 105 connects the state-detection end of dynamic password control chip 101, when testing circuit 105 detects that usb 1 04 connects external unit, to dynamic password control chip 101 output detections signal.
Dynamic password control chip 101 enters dormant state when receiving detection signal.
Battery 103 connects the power input of dynamic password control chip 101, and battery 103 is powered for dynamic password control chip 101, and when dynamic password control chip 101 enters dormant state, reduces the powering quantity to dynamic password control chip 101.
The input/output terminal of USB control chip 102 connects usb 1 04, USB control chip 102 and carries out interactive communication by usb 1 04 and external unit.
The utility model embodiment is by arranging testing circuit 105, when dynamic password control chip 101 is in running order, dynamic password chip is powered by battery 103, when testing circuit 105 detects that usb 1 04 accesses external unit, USB control chip 102 is started working, dynamic password control chip 101 enters dormant state automatically, dynamic password control chip 101 is still powered by battery 103, because dynamic password control chip 101 enters low power consumpting state, the powering quantity of battery 103 can be saved, and dynamic password control chip 101 does not interfere with each other mutually with the power supply of USB control chip 102, to avoid in prior art dynamic password control chip 101 when usb 1 04 accesses external unit, USB can be switched to power the defect causing dynamic password control chip 101 may lose preset content, the power supply achieving dynamic password control chip 101 and USB control chip 102 is independent, and do not need communication between USB control chip 102 and dynamic password control chip 101, decrease size of code and debugging efforts.
The another kind of embodiment of the utility model provides a kind of control system based on dynamic password and USBKEY, as shown in Figure 2, control system also comprises keyboard circuit 106, keyboard circuit 106 comprises multiple button, many the first signal wires and many secondary signal lines, many the first signal wires and the cross arrangement of many secondary signal lines, each button connects first signal wire and a secondary signal line, many the first signal wires are connected multiple input ends of dynamic password control chip 101 with many secondary signal lines, at least one secondary signal line in many secondary signal lines connects the input end of USB control chip 102.
Second output terminal of testing circuit 105 connects first signal wire in keyboard circuit 106, testing circuit 105 is when usb 1 04 connects external unit, adjust the level state of the first signal wire that it connects, make USB control chip 102 receive the key information of keyboard.
Concrete, testing circuit 105 comprises the first resistance R1, the second resistance R2 and switching tube; The first end of the first resistance R1 connects the power end of usb 1 04, second end of the first resistance R1 connects the first end of the second resistance R2 and the control end of switching tube, second end of the second resistance R2 is connected altogether with the input end of switching tube, the control end of switching tube is the first output terminal of testing circuit 105, and the output terminal of switching tube is the second output terminal of testing circuit 105.
Concrete, switching tube can be the switching devices such as field effect transistor, triode and IGBT.
Preferably, switching tube is the drain electrode of field effect transistor Q1, field effect transistor Q1, source electrode and grid be respectively the output terminal of switching tube, input end and control end.
Optionally, buffer circuit 108 is also provided with between the secondary signal line that USB control chip 102 is connected with it, buffer circuit 108 comprises one way conducting device and pull-up resistor, the input end of one way conducting device connects the first end of pull-up resistor, the output terminal of one way conducting device forms an output terminal of buffer circuit, the first end of each pull-up resistor connects an input end of USB control chip 102 correspondence, and the second end of each pull-up resistor connects direct supply.
Concrete, one way conducting device is the device that diode etc. has one-way conduction.
Preferably, one way conducting device is diode.
As shown in Figure 3, keyboard circuit 106 comprises 16 buttons, comprise four the first signal wires and four secondary signal lines of cross arrangement, wherein, the pin of the first signal wire is OTP_LINE0, OTP_LINE1, OTP_LINE2 and OTP_LINE3, the pin of secondary signal line is OTP_ROW0, OTP_ROW1, OTP_ROW2 and OTP_ROW3, first signal pins and secondary signal pin are the array scanning pins being connected OTP, the pin of secondary signal line is connected with USB control chip 102 respectively by buffer circuit 108, the pin OTP_ROW0 of secondary signal line connects the negative electrode of diode D1, the anode of diode D1 connects the first end of the 3rd resistance R3, second end of the 3rd resistance R3 connects the upturning key USB_UP of USB control chip 102, the pin OTP_ROW1 of secondary signal line connects the negative electrode of diode D2, the anode of diode D2 connects the first end of the 4th resistance R4, second end of the 4th resistance R4 connects the downturning key USB_DOWN of USB control chip 102, the pin OTP_ROW2 of secondary signal line connects the negative electrode of diode D3, the anode of diode D3 connects the first end of the 5th resistance R5, second end of the 5th resistance R5 connects the cancel key USB_CANCEL of USB control chip 102, the pin OTP_ROW3 of secondary signal line connects the negative electrode of diode D4, the anode of diode D4 connects the first end of the 6th resistance R6, second end of the 6th resistance R6 connects the confirmation button USB_ENTER of USB control chip 102, in testing circuit 105, USB_5V is the power supply signal connecting usb 1 04, field effect transistor Q1 is NMOS tube, USB_DET connects detection usb 1 04 status pin of OTP control chip, when using OTP pattern, USB control chip 102 is in off-position, because diode D1 to D4 does not allow current direction USB control chip 102, the grid of field effect transistor Q1 is low level, therefore electric current can not flow to field effect transistor Q1, therefore, OTP control chip can realize array scanning, when connecting USB, USB_5V is high level state, OTP control chip detects that USB_DET exits OTP pattern when being high level, enter park mode, the grid of field effect transistor Q1 is high level, electric current can flow to the S end of Q1, being equivalent to now OTP_LINE3 pin is ground connection, now USB_UP, USB_DOWN, USB_CANCEL, USB_ENTER tetra-button pins are inputted by the pull-up of isolation resistance R3 to R6, when the arbitrary button of switch S 11 to S14 is pressed, by button USB_UP, USB_DOWN, USB_CANCEL, USB_ENTER can detect that level is by high step-down, thus complete button detection.
Further, dynamic password control chip 101 also for when detecting that usb 1 04 scans button when not connecting external unit, and when receiving off signal or exceed preset value sweep time, enters dormant state.
The third embodiment of the utility model provides a kind of control system based on dynamic password and USBKEY, as shown in Figure 4, control system also comprises display screen 107, and the output terminal of dynamic password control chip 101 is connected the input end of display screen 107 with the output terminal of USB control chip 102;
Dynamic password control chip 101, when detecting that usb 1 04 connects external unit, stops controlling display screen 107 and entering dormant state; USB control chip 102USB interface 104 controls display screen 107 when connecting external unit.
Further, isolation resistance is provided with between each input end of the connected display screen of each output terminal 107 of USB control chip 102.
As shown in Figure 5, OTP chip is connected with the communication pin of display screen 107, USB main control chip is connected with display screen 107 data pin by resistance in series, when being in OTP pattern, OTP chip is powered to display screen 107 by OTP_LCD_VDD, USB main control chip is off-position, OTP chip be equivalent to add pull down resistor with the connection pin of display screen 107, still can with display screen 107 normal communication, when being in USB pattern, by USB_DET pin, OTP chip detects that USB accesses, the pin controlling display screen 107 is set to input state, then dormancy is entered, wait for next time and restart OTP pattern.
The another kind of embodiment of the utility model provides a kind of control method of the above-mentioned control system based on dynamic password and USBKEY, and as shown in Figure 6, control method comprises:
When step S101. testing circuit 105 detects that usb 1 04 connects external unit, to dynamic password control chip 101 output detections signal;
Step S102. dynamic password control chip 101 enters dormant state when receiving detection signal;
Step S103. battery 103 is powered for dynamic password control chip 101, and when dynamic password control chip 101 enters dormant state, reduces the powering quantity to dynamic password control chip 101;
Step S104.USB control chip 102 carries out interactive communication by usb 1 04 and external unit.
Optionally, dynamic password control chip 101 also for when detecting that usb 1 04 scans button when not connecting external unit, and when receiving off signal or exceed preset value sweep time, enters dormant state.
Optionally, dynamic password control chip 101, when detecting that usb 1 04 connects external unit, stops driving display screen 107 that USB control chip 102 pairs of display screens 107 are controlled, and enters dormant state;
Described USB control chip controls described display screen when described USB interface connects external unit.
A kind of control system based on dynamic password and USBKEY that the utility model provides and control method thereof, by arranging testing circuit, when dynamic password control chip is in running order, dynamic password chip is battery-powered, when testing circuit detects USB interface access external unit, USB control chip is started working, dynamic password control chip enters dormant state automatically, dynamic password control chip is still powered by battery, because dynamic password control chip enters low power consumpting state, the powering quantity of battery can be saved, and dynamic password control chip does not interfere with each other mutually with the power supply of USB control chip, to avoid in prior art dynamic password control chip when USB interface access external unit, USB can be switched to power the defect causing dynamic password control chip may lose preset content, the power supply achieving dynamic password control chip and USB control chip is independent, and do not need communication between USB control chip and dynamic password control chip, decrease size of code and debugging efforts.
Those of ordinary skill in the art can recognize, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with the combination of electronic hardware or computer software and electronic hardware.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present utility model.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the system of foregoing description, device and unit, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
In several embodiments that the application provides, should be understood that disclosed system, apparatus and method can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the utility model can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.
If described function using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part of the part that the technical solution of the utility model contributes to prior art in essence in other words or this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the utility model.And aforesaid storage medium comprises: USB flash disk, portable hard drive, ROM (read-only memory) (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), magnetic disc or CD etc. various can be program code stored medium.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field; make some equivalent alternative or obvious modification without departing from the concept of the premise utility; and performance or purposes identical, all should be considered as belonging to the scope of patent protection that the utility model is determined by submitted to claims.
Claims (7)
1., based on a control system of dynamic password and USBKEY, it is characterized in that, described control system comprises dynamic password control chip, USB control chip, USB interface, battery and testing circuit;
The input end of described testing circuit connects described USB interface, first output terminal of described testing circuit connects the state-detection end of described dynamic password control chip, described testing circuit detect USB interface connect external unit time, to described dynamic password control chip output detections signal;
Described dynamic password control chip enters dormant state when receiving described detection signal;
Described battery connects the power input of described dynamic password control chip, and described battery is that described dynamic password control chip is powered;
The input/output terminal of described USB control chip connects described USB interface, and described USB control chip carries out interactive communication by described USB interface and described external unit.
2. control system as claimed in claim 1, it is characterized in that, described control system also comprises keyboard circuit;
Described keyboard circuit comprises multiple button, many first signal wires and many secondary signal lines, described many first signal wires and the cross arrangement of many secondary signal lines, each button connects first signal wire and a secondary signal line, described many first signal wires are connected multiple input ends of described dynamic password control chip with described many secondary signal lines, and at least one secondary signal line in described many secondary signal lines connects the input end of described USB control chip;
Second output terminal of described testing circuit connects first signal wire in described keyboard circuit, described testing circuit is when described USB interface connects external unit, adjust the level state of the first signal wire that it connects, make described USB control chip receive the key information of described keyboard.
3. control system as claimed in claim 2, it is characterized in that, described dynamic password control chip also for when detecting that described USB interface scans button when not connecting external unit, and when receiving off signal or exceed preset value sweep time, enters dormant state.
4. control system as claimed in claim 2, it is characterized in that, described testing circuit comprises the first resistance, the second resistance and switching tube;
The first end of described first resistance connects the power end of described USB interface, second end of described first resistance connects the first end of described second resistance and the control end of described switching tube, second end of described second resistance is connected altogether with the input end of described switching tube, the control end of described switching tube is the first output terminal of described testing circuit, and the output terminal of described switching tube is the second output terminal of described testing circuit.
5. control system as claimed in claim 2, it is characterized in that, also buffer circuit is provided with between described USB control chip and described keyboard circuit, described buffer circuit comprises one way conducting device and pull-up resistor, the input end of described one way conducting device connects the first end of described pull-up resistor, the output terminal of described one way conducting device forms an output terminal of described buffer circuit, the first end of each pull-up resistor connects an input end corresponding to described USB control chip, and the second end of described each pull-up resistor connects direct supply.
6. the control system as described in any one of claim 1 to 5, is characterized in that, described control system also comprises display screen, and the output terminal of described dynamic password control chip is connected the input end of described display screen with the output terminal of described USB control chip;
Described dynamic password control chip, when detecting that described USB interface connects external unit, stops controlling described display screen and entering dormant state;
Described USB control chip controls described display screen when described USB interface connects external unit.
7. control system as claimed in claim 6, is characterized in that, is provided with isolation resistance between each input end of the described display screen that each output terminal of described USB control chip is connected with it.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520556434.XU CN204926090U (en) | 2015-07-28 | 2015-07-28 | Control system based on developments password and USBKEY |
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| CN201520556434.XU CN204926090U (en) | 2015-07-28 | 2015-07-28 | Control system based on developments password and USBKEY |
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| CN204926090U true CN204926090U (en) | 2015-12-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105005727A (en) * | 2015-07-28 | 2015-10-28 | 深圳市文鼎创数据科技有限公司 | Control system based on dynamic password and USBKEY and control method for control system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105005727A (en) * | 2015-07-28 | 2015-10-28 | 深圳市文鼎创数据科技有限公司 | Control system based on dynamic password and USBKEY and control method for control system |
| WO2017016131A1 (en) * | 2015-07-28 | 2017-02-02 | 深圳市文鼎创数据科技有限公司 | Control system based on dynamic password and usbkey, and control method therefor |
| CN105005727B (en) * | 2015-07-28 | 2018-07-17 | 深圳市文鼎创数据科技有限公司 | Control system based on dynamic password and USBKEY and its control method |
| US10708057B2 (en) | 2015-07-28 | 2020-07-07 | Shenzhen Excelsecu Data Technology Co., Ltd | Control system based on dynamic password and USBKEY, and control method thereof |
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