CN203465725U - Electronic signature expansion device - Google Patents
Electronic signature expansion device Download PDFInfo
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- CN203465725U CN203465725U CN201320185298.9U CN201320185298U CN203465725U CN 203465725 U CN203465725 U CN 203465725U CN 201320185298 U CN201320185298 U CN 201320185298U CN 203465725 U CN203465725 U CN 203465725U
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Abstract
The utility model relates to an electronic signature expansion device. The device comprises a first interface, a central control unit, a second interface, an output unit and a physical control unit. The first interface is used for connecting with a first device with a function of operating E-bank clients, The central control unit is achieved by utilizing an intelligent safe chip and a main control chip, used for collecting digital information transmitted by the first device and received by the first interface and transmitting the information to an output unit, used for transmitting digital information to a second device through the second interface based on confirmed operation information input by users, and used for receiving signed digital information from the second interface and transmitting the information through the first interface. The second interface is used for connecting with the second device with a function of E-bank authentication. The output unit is used for outputting the digital information collected by the central control unit. The physical control unit is used for receiving operation information input by the users and transmitting the information to the central control unit. The operation information comprises the confirmed operation information. The device can determine security of electronic signature authentication of an electronic signature authentication device.
Description
Technical field
The utility model relates to application of electronic technology field, relates in particular to a kind of electronic signature expansion equipment.
Background technology
At present, along with popularizing of Web bank, increasing people brings into use this conveniently financial service.China now the solution of the safety of generally acknowledged solution Internet-based banking services client be to use electronic signature equipment, as USBKey.It is very general that conventional USBKey carries out network security certification as the carrier of digital certificate.In the Net silver application of financial field, large-scale application is in the internet banking system of each bank of the whole nation for traditional USBKey, and custom is referred to as generation USBKey in the industry.But along with the development of Net silver and universal, for the attack of generation USBKey, with more and more many, be mainly reflected in two aspects, the one, in process of exchange, for the attack of transaction data, the key elements such as the payee account in transaction data and the amount of money are revised; Another aspect is to attack for transaction itself, forges a transaction in the unwitting situation of user.For these, attack, the Net silver application safety certified product of bank is transitioned into the two generation USBKey with LCDs and button by generation USBKey gradually.
Although at present, nationalized bank and numerous local bank are all at distribution two generation USBKey, and there has been a large amount of generation USBKey storage clients in each bank of the whole nation, and these storages client is still faced with hacker's attack.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of electronic signature expansion equipment, to solve the potential safety hazard of existing generation Net silver authentication USBKey.
In order to solve the problems of the technologies described above, the utility model provides a kind of electronic signature expansion equipment, and described equipment comprises:
First interface, for the first equipment connection with having operation Net silver client functionality;
Central control unit, adopt intelligent and safe chip and main control chip to realize, be connected with described first interface, the second interface, output unit and physical control unit, comprise message processing module, for extracting by first interface, receive the numerical information that described the first equipment sends, and send to output unit, and the confirmation operation information based on user's input, by described the second interface, to the second equipment, send numerical information, also for receiving the numerical information signing and send by described first interface from the second interface;
The second interface, for the second equipment connection with having Net silver authentication function;
Output unit, is connected with described central control unit, the numerical information of extracting for exporting described central control unit;
Physical control unit, is connected with described central control unit, and for receiving the operation information of user's input and sending to described central control unit, described operation information comprises confirmation operation information.
Further, described intelligent and safe chip is high security system (SOC) chip based on 8 or above Reduced Instruction Set Computer (RISC) processor.
Further, the STM32 chip that described intelligent and safe chip is ST or the Z8D168U chip of national technology, described main control chip is ISP1761USB controller or CH375USB controller.
Further, described central control unit adopts intelligent and safe chip to realize Net silver authentication function, and the Net silver authentication function of described central control unit and described the second equipment are realized the Net silver authentication of identical or different bank.
Further, described equipment also comprises actuating switch, for control based on described central control unit or user's operation, realize being connected and disconnection of described central control unit and described the second interface, described central control unit receives after described numerical information, controls being connected between described actuating switch conducting and described the second interface; Receive numerical information after described signature after the schedule time, control described actuating switch disconnect with described the second interface between be connected.
Further, described central control unit also comprises the Interface status control module being realized by main control chip, the Interface status of the first equipment connecting for detection of described first interface, if described the first equipment interface is interface master status, it is that interface is from equipment that described first interface is set, if described the first equipment interface be interface from equipment state, it is interface main equipment that described first interface is set, and for described the second interface is set, is also interface master status.
Further, described central control unit also comprises recognition of devices module, when first interface being set being interface master status, for identifying whether the equipment of first interface connection is for having the first equipment of operation Net silver client functionality, when the second interface being set being interface master status, for identifying whether the equipment of the second interface connection is second equipment with Net silver authentication function, when the equipment only connecting when first interface is the first equipment, described message processing module carry out and the first equipment between processing, and when the equipment of the second interface connection is the second equipment, described message processing module carry out and the second equipment between processing.
Further, described first interface and described the second interface are A type or MiniB type USB interface, and described first interface is directly connected or connects by breakout box with described the second equipment with described the first equipment and described the second interface.
Further, described the second interface adopts the mode that circuit is put up a bridge or interface docks to be connected with described the second equipment.
Further, described equipment comprises battery, and described physical control unit comprises the on & off switch of opening, closing for opertaing device, and described on & off switch is in opening state, and described battery provides power supply.
Further, described central control unit also comprises energy supply control module, for realizing power management, comprising: when the first equipment connecting at first interface is personal computer (PC), employing external power source is described equipment power supply and/or is battery charging.
Compared with prior art, utilize the utility model expansion equipment to increase not have the security of electron underwriting authentication of the electron underwriting authentication equipment of output device and physical control function, make it be compatible with existing electron underwriting authentication system, and the utility model expansion equipment can possess electron underwriting authentication function by high intelligent and safe chip, has increased the practicality of expansion equipment.
Other features and advantages of the utility model will be set forth in the following description, and, partly from instructions, become apparent, or understand by implementing the utility model.The purpose of this utility model and other advantages can be realized and be obtained by specifically noted structure in instructions, claims and accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the modular structure schematic diagram of the utility model electronic signature expansion equipment embodiment 1;
Fig. 2 is the modular structure schematic diagram of the utility model electronic signature expansion equipment embodiment 1.
Accompanying drawing is used to provide the further understanding to technical solutions of the utility model, and forms a part for instructions, is used from explanation the technical solution of the utility model with the application's embodiment mono-, does not form the restriction to technical solutions of the utility model.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with the drawings and specific embodiments, technical scheme described in the utility model is described in further detail, so that those skilled in the art can better understand the utility model being implemented, but illustrated embodiment is not as to restriction of the present utility model.It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.
Embodiment 1
As shown in Figure 1, the utility model electronic signature expansion equipment embodiment 1 comprises first interface, central control unit, the second interface, output unit and physical control unit, wherein:
First interface, for the first equipment connection with having operation Net silver client functionality;
Central control unit, adopt intelligent and safe chip and main control chip to realize, be connected with described first interface, the second interface, output unit and physical control unit, comprise message processing module, for extracting by first interface, receive the numerical information that described the first equipment sends, and send to output unit, and the confirmation operation information based on user's input, by described the second interface, to the second equipment, send numerical information, also for receiving the numerical information signing and send by described first interface from the second interface;
The second interface, for the second equipment connection with having Net silver authentication function;
Alternatively, described the second interface adopts the mode that circuit is put up a bridge or interface docks to be connected with described the second equipment.
Described first interface and described the second interface are A type or MiniB type USB interface, and described first interface is directly connected or connects by breakout box with described the second equipment with described the first equipment and described the second interface.
Output unit, is connected with described central control unit, the numerical information of extracting for exporting described central control unit, and alternatively, described output unit shows with word or the mode of speech play is exported described numerical information;
User can browse or listen to Transaction Information by the output unit of equipment, as name, and account and the amount of money, or image information etc., but do not limit to therewith.Can adopt current LCD, OLED Screen Technology realizes output unit, simple and convenient, and its major function is that the sensitive information that user is carried out in network bank business based shows, such as: name, account, the amount of money etc.Output unit provides energy by internal cell or external power source, and is subject to the control of central control unit, the demonstration information that demonstration or speech play central control unit are issued only.
Physical control unit, is connected with described central control unit, and for receiving the operation information of user's input and sending to described central control unit, described operation information comprises confirmation operation information.
Alternatively, physical control unit can be by information page turning key, transaction cancel key, and the basic function keys such as USB interface actuating switch key (trade confirmation key) form, can also increase other a plurality of buttons such as numerical key, function switch key to meet the needs of future development, but not only be confined to this.It is the external input equipment of equipment, and user can carry out Password Input by this module, and function is switched, the control of electronic signature etc.While realizing, can adopt such as light sensation button, film key, the modes such as the young sheet of pot complete.Physical control unit provides energy by internal cell or external power source, and is subject to the control of central control unit.On physical control unit, user's all operations information signal can be processed to central control unit by the circuit transmission in equipment.
What the utility model electronic signature expansion equipment was selected due to master chip own is the chip that electronic signature functionality can be provided, so itself be also the equipment that independently signs electronically.Alternatively, the characteristic based on intelligent and safe chip itself, described central control unit adopts intelligent and safe chip to realize Net silver authentication function, and the Net silver authentication function of described central control unit and described the second equipment are realized the Net silver authentication of identical or different bank.
Embodiment 2
As shown in Figure 2, the utility model electronic signature expansion equipment embodiment 2 comprises first interface, central control unit, the second interface, output unit, physical control unit, actuating switch, wherein:
First interface, for the first equipment connection with having operation Net silver client functionality;
Central control unit, adopt intelligent and safe chip and main control chip to realize, be connected with described first interface, the second interface, output unit and physical control unit, comprise message processing module, for extracting by first interface, receive the numerical information that described the first equipment sends, and send to output unit, and the confirmation operation information based on user's input, by described the second interface, to the second equipment, send numerical information, also for receiving the numerical information signing and send by described first interface from the second interface;
Described intelligent and safe chip is based on 8 or above RISC(reduced instruction set computer, Reduced Instruction Set Computer) high security system (SOC) chip of processor, particularly, the STM32 chip that described intelligent and safe chip can be ST or the Z8D168U chip of national technology, described main control chip is ISP1761USB controller or CH375USB controller.
The second interface, for the second equipment connection with having Net silver authentication function;
Alternatively, described the second interface adopts the mode that circuit is put up a bridge or interface docks to be connected with described the second equipment.
Described first interface and described the second interface are A type or MiniB type USB interface, and described first interface is directly connected or connects by breakout box with described the second equipment with described the first equipment and described the second interface.
Output unit, is connected with described central control unit, the numerical information of extracting for exporting described central control unit, and alternatively, described output unit shows with word or the mode of speech play is exported described numerical information;
Physical control unit, be connected with described central control unit, for receiving the operation information of user's input and sending to described central control unit, described operation information comprises confirmation operation information, and the implementation of described physical control unit includes but not limited to adopt light sensation button, film key or the young sheet of pot to realize.
Alternatively, the characteristic based on intelligent and safe chip itself, described central control unit adopts intelligent and safe chip to realize Net silver authentication function, and the Net silver authentication function of described central control unit and described the second equipment are realized the Net silver authentication of identical or different bank.
Actuating switch, realizes being connected and disconnection of described central control unit and described the second interface for the control based on described central control unit or user operation; Particularly, described central control unit receives after described numerical information, controls being connected between described actuating switch conducting and described the second interface; Receive numerical information after described signature after the schedule time, control described actuating switch disconnect with described the second interface between be connected.
Understandably, based on user operation, be to realize being connected or disconnection of central control unit and the second interface based on physical contact or noncontact, the control based on central control unit is to realize being connected or disconnection of central control unit and the second interface based on electric signal.
Particularly, when user confirms that the numerical information of this equipment output unit output is errorless, by manual operation actuating switch or central control unit, control and make actuating switch in closure state, and keep the schedule time (such as 5 minutes), actuating switch switches under the control of central control unit subsequently, or automatically returns to off-state.When actuating switch is during in closure state, the central control unit of this equipment can be adjusted into interface master status by the second interface automatically, and the equipment of the second interface access is identified and operated, and by the second equipment USBkey, completes electronic signature.
Take below first, second interface is that USB interface is example, and the first USB interface, secondary USB interface, central control unit in embodiment 1 and embodiment 2 are elaborated:
The first USB interface: the equipment of being responsible for is connected and communication with the first equipment (as PC or intelligent mobile terminal), institute's USB communication pin that provides and usb circuit connecting communication in central control unit are provided while realizing.USB is that interface has many kinds, and modal is exactly use in PC that flat, and this is called A type USB mouth, there are 4 lines the inside, according to whom, pegging graft, who is divided into male and female interface, on general USB flash disk, electric signing tools or connecting line be public mouthful, also claim USB plug; On machine be female mouthful, also claim USB socket.Meanwhile, also have a kind of modal low profile interface on digital product that is applicable to, because digital product volume is limit, so conventionally use be Mini Type B USB interface, and be to be generally set to female mouthful, be exactly Mini Type B USB socket; But Mini Type B interface also has numerous species, there is the interface of Mini Type B 5Pin interface, Mini Type B 4Pin, interface of Mini Type B 8Pin etc.; This MiniB type USB socket of the general employing of the second equipment with electronic signature (also claiming Net silver authentication) function; Conventionally adopt Mini Type B 5Pin interface.The first USB interface in the present invention, as the USB device being connected with PC or intelligent mobile terminal, is considered in the compatibility of invention simultaneously, public mouthful of the compatible A type USB of the first USB interface needs, Mini Type B USB interface while realizing.
Secondary USB interface: the equipment of being responsible for is connected and communication with second equipment (as USBKey or electronic signature equipment) with electronic signature (also claiming Net silver authentication) function, and institute's USB communication pin that provides and usb circuit connecting communication in central control unit are provided while realizing.While realizing, secondary USB interface needs female mouthful of compatible A type USB, Mini Type B USB interface.Especially, it should be noted that, owing to considering Cost Problems, when realizing, invention can directly adopt circuit overlapping mode to provide and USBKey or electronic signature equipment, utilize circuit or pin to be directly connected and communication with the USBKey of access or the USB interface of electronic signature equipment, and without increase female mouthful of A type USB or Mini Type B USB interface in this equipment, with this, reach the object of workout cost.
Central control unit is the central processing unit of whole equipment, and it be that the core of this equipment is also the bridge of other modules.
The master chip that the utility model central control unit adopts is the intelligent and safe chip that electronic signature functionality can be provided, one the safe SOC chip of height based on 8 or above risc processor, possesses the features such as high throughput, high security, low-power consumption, low cost.As the Z8D168U chip of the STM32 chip of ST or national technology or chip of the same type etc.Especially it should be noted that, adopt its chip internal in master chip described above all to have USB from equipment interface characteristic.If the first equipment is PC, because PC itself just has USB main equipment characteristic, if two equipment are both USB main equipment, cannot be connected so.In the utility model owing to providing USB from equipment interface in the chip of selecting, so when being connected with PC, its first USB interface is connected with PC from equipment as USB.
Because said chip does not have the characteristic of USB main equipment, so need to be connected with a USB main equipment, using that this guarantees that secondary USB interface is that generation USBKey is connected as USB main equipment and the second equipment in realization.At this, can select to extend out usb bus common interface chip (above said main control chip) and solve, as ISP1761USB controller scheme or CH375 scheme cheaply.
In addition, when this equipment is connected with the first equipment PC, because PC itself is USB main equipment, so first USB interface of this equipment can be set to USB by the control of central control unit, from equipment, be connected with PC, and in the first USB interface, keep USB from this feature of equipment always.But when the first equipment is intelligent mobile terminal, when this equipment is connected with intelligent mobile terminal, because intelligent mobile terminal itself is all that USB is from equipment, so first USB interface of this equipment can be set to by the control of central control unit USB main equipment, be connected with intelligent mobile terminal, and in the first USB interface, keep this feature of USB main equipment always.
Understandably, except above hardware chip, this equipment also needs to develop some software programs and drives this equipment, comprise: embedded OS (control to this equipment by the exploitation realization to its embedded OS on chip), USB Client Driver, USB driver and usb host controller driver.The issued transaction of application program is by USB Client Driver, when starting, USB device to be used as to system software to comprise USB driver and USB Host Controller Driver, and USB driver is responsible for the position coding, package, cyclic check, transmission, mistake processing of configuration management, user management, bus management and data transfer management and data etc.Need especially to propose, usb protocol stack need to be realized in master chip, to guarantee the normal operation of USB main equipment, if extending out usb bus common interface chip usb protocol stack can being provided of adopting can be simplified this step so.
In central control unit, also should have built-in storage area, in this region, store embedded OS program, each driver of USB, Net silver client-side program, character library Chinese matrix etc.
As mentioned above, in above embodiment 1 and embodiment 2, described central control unit also comprises the Interface status control module being realized by main control chip, the Interface status of the first equipment connecting for detection of described first interface, if described the first equipment interface is interface master status, it is that interface is from equipment that described first interface is set, if described the first equipment interface is that interface is from equipment state, it is interface main equipment that described first interface is set, and for described the second interface is set, is also interface master status.
Alternatively, described central control unit also comprises recognition of devices module, when first interface being set being interface master status, for identifying whether the equipment of first interface connection is for having the first equipment of operation Net silver client functionality, when the second interface being set being interface master status, for identifying whether the equipment of the second interface connection is second equipment with Net silver authentication function, when the equipment only connecting when first interface is the first equipment, described message processing module carry out and the first equipment between processing, and when the equipment of the second interface connection is the second equipment, described message processing module carry out and the second equipment between processing.
In another embodiment, alternatively, described equipment comprises battery, and described physical control unit comprises the on & off switch of opening, closing for opertaing device, and described on & off switch is in opening state, and described battery provides power supply.Thereby realize the function of saves energy.
Described central control unit also comprises energy supply control module, for realizing power management, comprising: when the first equipment connecting at first interface is personal computer (PC), employing external power source is described equipment power supply and/or is battery charging.
That is, no matter on & off switch is in opening or closed condition, and during the first interface of this equipment access external power source, this equipment all can carry out charging operations to internal cell, and this function is completed by energy supply control module.
Particularly, energy supply control module is responsible for the power management function of this equipment, and energy supply control module and each module are connected to following situation and energy are provided and complete charging:
When the first interface of this equipment is connected with PC, it is central control unit, output unit, the power supply of physical control unit that this equipment adopts external power source.
After actuating switch closure, energy supply control module utilizes internal cell for accessed the second equipment equipment power supply, completes identification subsequently and the work of electronic signature.
When the first interface of this equipment is connected with intelligent mobile terminal, it is central control unit, output unit, the power supply of physical control unit that this equipment adopts internal electric source.
When this equipment by first interface and PC or external power source when being connected, this energy supply control module adopts the electric power being provided by the USB interface on PC or external power source to charge to device interior battery.
Battery is responsible for equipment electric energy is provided, and is subject to energy supply control module and is connected with each module, adopts button-shaped rechargeable battery to realize.
Compared with prior art, utilize the utility model expansion equipment to increase not have the security of electron underwriting authentication of the electron underwriting authentication equipment of output device and physical control function, make it be compatible with existing electron underwriting authentication system, and the utility model expansion equipment can possess electron underwriting authentication function by high intelligent and safe chip, has increased the practicality of expansion equipment.
Various unit described in the utility model embodiment, module are only a kind of examples of dividing according to its function; understandably; in the situation that system/device/equipment is realized identical function; those skilled in the art can provide one or more other function dividing mode; can be by wherein functional entity device of any one or more functional modules employing or unit are realized when concrete application; undeniable ground, above mapping mode is all within the application's protection domain.
Although the disclosed embodiment of the utility model as above, the embodiment that described content only adopts for ease of understanding the utility model, not in order to limit the utility model.Those of skill in the art under any the utility model; do not departing under the prerequisite of the disclosed spirit and scope of the utility model; can in the form of implementing and details, carry out any modification and variation; but scope of patent protection of the present utility model, still must be as the criterion with the scope that appending claims was defined.
Claims (10)
1. an electronic signature expansion equipment, is characterized in that, described equipment comprises:
First interface, for the first equipment connection with having operation Net silver client functionality;
Central control unit, adopt intelligent and safe chip and main control chip to realize, be connected with described first interface, the second interface, output unit and physical control unit, comprise message processing module, for extracting by first interface, receive the numerical information that described the first equipment sends, and send to output unit, and the confirmation operation information based on user's input, by described the second interface, to the second equipment, send numerical information, also for receiving the numerical information signing and send by described first interface from the second interface;
The second interface, for the second equipment connection with having Net silver authentication function;
Output unit, is connected with described central control unit, the numerical information of extracting for exporting described central control unit;
Physical control unit, is connected with described central control unit, and for receiving the operation information of user's input and sending to described central control unit, described operation information comprises confirmation operation information.
2. equipment as claimed in claim 1, is characterized in that: described intelligent and safe chip is the high security system chip based on 8 or above RISC processor.
3. equipment as claimed in claim 1, is characterized in that: the STM32 chip that described intelligent and safe chip is ST or the Z8D168U chip of national technology, described main control chip is ISP1761USB controller or CH375USB controller.
4. equipment as claimed in claim 1, it is characterized in that: described equipment also comprises actuating switch, for control based on described central control unit or user's operation, realize being connected and disconnection of described central control unit and described the second interface, described central control unit receives after described numerical information, controls being connected between described actuating switch conducting and described the second interface; Receive numerical information after described signature after the schedule time, control described actuating switch disconnect with described the second interface between be connected.
5. equipment as claimed in claim 1, it is characterized in that: described central control unit also comprises the Interface status control module being realized by main control chip, the Interface status of the first equipment connecting for detection of described first interface, if described the first equipment interface is interface master status, it is that interface is from equipment that described first interface is set, if described the first equipment interface is that interface is from equipment state, it is interface main equipment that described first interface is set, and for described the second interface is set, is also interface master status.
6. equipment as claimed in claim 5, it is characterized in that: described central control unit also comprises recognition of devices module, when first interface being set being interface master status, for identifying whether the equipment of first interface connection is for having the first equipment of operation Net silver client functionality, when the second interface being set being interface master status, for identifying whether the equipment of the second interface connection is second equipment with Net silver authentication function, when the equipment only connecting when first interface is the first equipment, described message processing module carry out and the first equipment between processing, and when the equipment of the second interface connection is the second equipment, described message processing module carry out and the second equipment between processing.
7. equipment as claimed in claim 1, it is characterized in that: described first interface and described the second interface are A type or MiniB type USB interface, described first interface is directly connected or connects by breakout box with described the second equipment with described the first equipment and described the second interface.
8. equipment as claimed in claim 1, is characterized in that: described the second interface adopts circuit to put up a bridge with described the second equipment or the mode of interface docking is connected.
9. equipment as claimed in claim 1, is characterized in that: described equipment comprises battery, and described physical control unit comprises the on & off switch of opening, closing for opertaing device, and described on & off switch is in opening state, and described battery provides power supply.
10. the equipment as described in claim 1 or 9, it is characterized in that: described central control unit also comprises energy supply control module, be used for realizing power management, comprise: when the first equipment connecting at first interface is personal computer, employing external power source is described equipment power supply and/or is battery charging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320185298.9U CN203465725U (en) | 2013-04-12 | 2013-04-12 | Electronic signature expansion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320185298.9U CN203465725U (en) | 2013-04-12 | 2013-04-12 | Electronic signature expansion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203465725U true CN203465725U (en) | 2014-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320185298.9U Expired - Lifetime CN203465725U (en) | 2013-04-12 | 2013-04-12 | Electronic signature expansion device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020172797A1 (en) * | 2019-02-26 | 2020-09-03 | 南京摩铂汇信息技术有限公司 | Digital signature terminal and secure communication method |
| CN107092571B (en) * | 2016-02-18 | 2021-10-15 | 医科达有限公司 | Device identification |
-
2013
- 2013-04-12 CN CN201320185298.9U patent/CN203465725U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107092571B (en) * | 2016-02-18 | 2021-10-15 | 医科达有限公司 | Device identification |
| WO2020172797A1 (en) * | 2019-02-26 | 2020-09-03 | 南京摩铂汇信息技术有限公司 | Digital signature terminal and secure communication method |
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Granted publication date: 20140305 |