CN102255730A - Digital certificate safety lock device and digital certificate authentication system and method - Google Patents
Digital certificate safety lock device and digital certificate authentication system and method Download PDFInfo
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Abstract
The invention relates to a digital certificate safety lock device and a digital certificate authentication system and method. The digital certificate safety lock device comprises a universal encryption and digital signature microcontroller, an audio plug and a first modulation and demodulation module, wherein the universal encryption and digital signature microcontroller is provided with an encryption and digital signature module and a storage for storing a digital certificate, a key of the digital certificate and encryption and decryption algorithms; and the first modulation and demodulation module is used for modulating data information from the encryption and digital signature module for transmitting through an MIC (Microphone) pole of the audio plug, demodulating a signal received from a first sound channel pole of the audio plug and transmitting the demodulated signal to the encryption and digital signature module. The digital certificate safety lock device is provided with a universal audio interface plug which has high university and adaptability and can support communication terminals such as mobile phones, tablet computers, PDAs (Personal Digital Assistants) or PCs (Personal Computers) and the like, with audio interfaces. Due to the functions of independent hardware signature, digital certificate encryption and the like, the security of application logon and transactions of Internet banks or enterprises can be ensured to the maximum extent.
Description
Technical field
The present invention relates to safe access authentication, more particularly, relate to a kind of digital certificate security lock arrangement, digital certificate authentication system and method with audio interface.
Background technology
Telecom terminal products such as mobile phone, panel computer, PDA lack general USB interface at present, therefore U-KEY that generally uses on PC (PC) or U shield etc. use USB interface hardware independently digital certificate and signature algorithm technology, can't use on this type of communication terminal.
The Internet bank's software that is installed on the part communication terminal of Pu Jiing does not have independently safety key of hardware, makes its transaction security reduce, and function reduces.Along with the enhancing of communication terminal functions, they have faced the similar hacker attacks of PC, document certificate and security risk such as have lost, independently, general hardware digital certificate equipment and cryptographic algorithm become particularly important.Same problem also appears at secure log is existed in the applied environment of strong demand, and is online etc. as enterprise VPN, Alipay, Net silver.
In the present above-mentioned application, as the Web bank on PC inquiry and transaction software, the USB KEY that generally adopts for security reason carries out digital certificate store, signature and summary computing as hardware unit independently.Along with the mobile communication terminal user popularity rate improves rapidly, the mobile phone users total amount will be considerably beyond the number of users that has PC.Each bank and enterprise are that mobile communication terminal user has been developed special-purpose mobile communication terminal software, but do not have independent digit certificate hardware such as USB KEY above the mobile communication terminal, and fail safe still can not get guaranteeing.
The USB KEY that Web bank generally adopts at present needs main equipment (PC etc.) to have USB interface, and can install driver, and in fact perhaps so-called free drive USB KEY has shared the above operating system HID interface driving of WINDOWS XP.Intelligent communications terminal or other personal hand-held communication terminals generally do not have USB interface, the more impossible built-in driving that " free drive " prerequisite of suitable USB KEY is arranged.But PC, communication terminal or personal hand-held communication terminal all have the audio interface that has earphone and MIC, therefore need invention a kind of universal audio interface equipment (KEY), it adopts audio interface and has the digital certificate of USB KEY and hardware capability such as signature algorithm.
Summary of the invention
The technical problem to be solved in the present invention is, many communication terminals at prior art are not provided with USB interface, and USB interface is not general, can't use prior USB KEY to carry out the defective of digital certificate checking, a kind of digital certificate security lock arrangement that has audio jack is provided, and it can communicate to connect by universal audio interface and communication terminal.
The technical problem to be solved in the present invention is, many communication terminals at prior art are not provided with USB interface, can't use U-KEY to carry out the defective of digital certificate checking, a kind of digital certificate authentication system is provided, comprising the digital certificate security lock arrangement that has audio jack, can communicate to connect by audio interface and communication terminal.
The technical problem to be solved in the present invention is, many communication terminals at prior art are not provided with USB interface, can't use U-KEY to carry out the defective of digital certificate checking, a kind of digital certificate authentication method is provided, and the digital certificate security lock arrangement that wherein has audio jack can communicate to connect by audio interface and communication terminal.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of digital certificate security lock arrangement, comprise general encryption and digital signature microcontroller, it is provided with encrypts and digital signature module and the memory that is used to store digital certificate and key and enciphering and deciphering algorithm; It is characterized in that, also comprise:
Audio jack, it has the MIC utmost point and the first sound channel utmost point; And
The first modulation module, be used for spreading out of, and be used for signal to the first sound channel utmost point that is received from described audio jack and carry out demodulation and after obtaining data message, be sent to described encryption and digital signature module modulating with the MIC utmost point by described audio jack from the data message of described encryption and digital signature module.
In digital certificate security lock arrangement of the present invention, the described first modulation module comprises with described general encryption and digital signature micro-controller communications and links to each other, is used to carry out the first communication microcontroller that the Code And Decode of audio signal is handled, and ac-coupled circuit and low-pass filter circuit, wherein, the output of the described first communication microcontroller is connected in Mike (MIC) utmost point of described audio jack by low-pass filter circuit, and the input of the described first communication microcontroller is connected in the first sound channel utmost point of described audio jack by ac-coupled circuit.
In digital certificate security lock arrangement of the present invention, the described first modulation module comprises with described general encryption and digital signature micro-controller communications and links to each other, is used to carry out the first communication microcontroller and first digital to analog converter that the Code And Decode of audio signal is handled, wherein, the output of the described first communication microcontroller is connected in the MIC utmost point of described audio jack by described first digital to analog converter, and the input of the described first communication microcontroller is connected in the first sound channel utmost point of described audio jack.
In digital certificate security lock arrangement of the present invention, the described first modulation module also comprises first analog to digital converter, and the input of the described first communication microcontroller is connected in the first sound channel utmost point of described audio jack by described first analog to digital converter.
In digital certificate security lock arrangement of the present invention, the described first modulation module comprises ac-coupled circuit, low-pass filter circuit and is integrated in the first encode/decode audio signal module on described general encryption and the digital signature microcontroller, wherein, the output of described general encryption and digital signature microcontroller is connected in Mike (MIC) utmost point of described audio jack by low-pass filter circuit, and the input of described general encryption and digital signature microcontroller is connected in the first sound channel utmost point of described audio jack by ac-coupled circuit.
In digital certificate security lock arrangement of the present invention, the described first modulation module comprises first digital to analog converter and is integrated in the first encode/decode audio signal module on described general encryption and the digital signature microcontroller, wherein, the output of described general encryption and digital signature microcontroller is connected in the MIC utmost point of described audio jack by described first digital to analog converter, and the input of described general encryption and digital signature microcontroller is connected in the first sound channel utmost point of described audio jack.
In digital certificate security lock arrangement of the present invention, the described first modulation module also comprises first analog to digital converter, and the input of described general encryption and digital signature microcontroller is connected in the first sound channel utmost point of described audio jack by described first analog to digital converter.
In digital certificate security lock arrangement of the present invention, also comprise the electric supply installation that is used to described encryption lock device power supply; And described audio jack also has the second sound channel utmost point; Described electric supply installation comprises the electric weight gatherer that is built in described digital certificate security lock arrangement and is connected in the described second sound channel utmost point, and perhaps described electric supply installation comprises the battery that is built in the described digital certificate security lock arrangement.
In digital certificate security lock arrangement of the present invention, described general encryption and digital signature microcontroller and the described first communication microcontroller are by UART interface or USB interface or I
2C interface communicates to connect.
The present invention solves another technical scheme that its technical problem adopts: construct a kind of digital certificate authentication system, comprising:
Aforesaid digital certificate security lock arrangement;
The communication terminal that has audio interface and communication module, described communication terminal are provided with the second modulation module of the modulation that is used to carry out audio signal;
Certificate server;
Wherein, the audio jack of described digital certificate security lock arrangement and the audio interface of described communication terminal communicate to connect, and described communication terminal communicates to connect by communication network and described certificate server via described communication module.
In digital certificate authentication of the present invention system, the described second modulation module comprises: being arranged on being used on the described communication terminal carries out the second communication microcontroller that the Code And Decode of audio signal is handled; Perhaps be integrated in the second encode/decode audio signal module on the described communication terminal.
In digital certificate authentication of the present invention system, described communication terminal comprises mobile phone, computer or the personal digital assistant that Internet bank's software is installed, described certificate server comprises the web of Internet bank server and communicates with continuous application server that described application server is connected with database communication.
The present invention solves another technical scheme that its technical problem adopts: a kind of digital certificate authentication method is provided, may further comprise the steps:
The logging request that certificate server received communication terminal sends by communication network is also returned the response signal that comprises a serial data;
After the described response signal modulation that described communication terminal will receive, and send the digital certificate security lock arrangement to by audio interface;
Described digital certificate security lock arrangement carries out obtaining described serial data again after the demodulation to the received signal, and described serial data is carried out ciphering signature obtains the ciphering signature resultant string;
Described digital certificate security lock arrangement returns to described communication terminal by audio interface after described ciphering signature resultant string is modulated;
Again obtain described ciphering signature resultant string after the demodulation to the received signal of described communication terminal, and by communication network described ciphering signature resultant string is sent to described certificate server and verifies.
Implement the present invention, has following beneficial effect: because digital certificate security lock arrangement of the present invention has the universal audio interface plug, its versatility and applicability are strong, can support to have the communication terminal of audio interface, as mobile phone, panel computer, PDA or PC etc.Functions such as separate hardware signature, digital certificate encryption can guarantee at utmost that the Internet bank or enterprise use the safety of login and transaction.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation of digital certificate security lock arrangement of the present invention;
Fig. 2 A is the structural representation of first embodiment of digital certificate security lock arrangement of the present invention;
Fig. 2 B is the structural representation of second embodiment of digital certificate security lock arrangement of the present invention;
Fig. 3 A is the structural representation of the 3rd embodiment of digital certificate security lock arrangement of the present invention;
Fig. 3 B is the structural representation of the 4th embodiment of digital certificate security lock arrangement of the present invention;
Fig. 4 A is the structural representation of the 5th embodiment of digital certificate security lock arrangement of the present invention;
Fig. 4 B is the structural representation of the 6th embodiment of digital certificate security lock arrangement of the present invention;
Fig. 5 is the structural representation of digital certificate authentication of the present invention system;
Fig. 6 A is the structural representation of first embodiment of digital certificate authentication of the present invention system;
Fig. 6 B is the structural representation of second embodiment of digital certificate authentication of the present invention system;
Fig. 7 is the flow chart of digital certificate authentication method of the present invention.
Embodiment
The present invention conceives a kind of digital certificate security lock arrangement that has audio jack and (also can be described as universal audio interface KEY, be called for short A-KEY), so that cooperate with the communication terminal that has audio interface, user identity is authenticated, with safety access service or application system, Internet bank's operation system for example.
As shown in Figure 1, digital certificate security lock arrangement 100 of the present invention comprises general encryption and digital signature microcontroller 10, the first modulation module 20 and audio jack 30.Wherein, general encryption and digital signature microcontroller 10 are provided with and encrypt and digital signature module 12 and the memory (not shown) that is used to store digital certificate and key and enciphering and deciphering algorithm.Audio jack 30 comprises Mike (MIC) utmost point 32 and the first sound channel utmost point (for example a left side or the R channel utmost point) 34.In the present invention, as selection, audio jack 30 can be a headset integral type plug.As another selection, audio jack 30 also can be the split type plug that headset plug separates with Mike (MIC) plug.The MIC utmost point 32 and a left side and/or the R channel utmost point all are arranged on the same contact pin on headset integral type plug, are isolated by insulating material each other.On split type plug, the MIC utmost point 32 is arranged on the MIC plug; A left side and/or the R channel utmost point are arranged on the headset plug, are isolated by insulating material each other.
In operation, the first modulation module 20 is used for spreading out of modulating with the MIC utmost point 32 by audio jack from the data message of described encryption and digital signature module 12, and is used for signal to the first sound channel utmost point 34 that is received from described audio jack and carries out demodulation be sent to described encryption and digital signature module 12 after obtaining data message.
Fig. 2 A is the structural representation of the digital certificate security lock arrangement 100A of first embodiment of the invention.As shown in Figure 1, digital certificate security lock arrangement 100A comprises general encryption and digital signature microcontroller 10, the first modulation module 20, audio jack 30 and electric weight gatherer 52.Wherein be provided with and encrypt and digital signature module 12 and memory (not shown), store digital certificate and key thereof and enciphering and deciphering algorithm in this memory.The first modulation module 20 comprises the first communication microcontroller 22, low-pass filter circuit 24, ac-coupled circuit 26.Be provided with audio coding module 22a and audio decoder module 22b in the first communication microcontroller 22, be used to carry out the Code And Decode processing of audio signal.Audio jack 30 comprises the Mike MIC utmost point 32, R channel utmost point 34a, L channel utmost point 34b.
General encryption and digital signature microcontroller 10 and the first communication microcontroller 22 communicate to connect, for example by UART interface, USB interface or I
2C interface or other communication interfaces that is suitable for communicate.The output of the first communication microcontroller 22 is connected in the MIC utmost point 32, the first communication microcontrollers of audio jack by low-pass filter circuit 24 20 inputs are connected in the R channel utmost point 34a of audio jack 30 by ac-coupled circuit 26.Electric weight gatherer 52 is connected in the L channel utmost point 34b of audio jack 30, is used for obtaining electric energy from the communication terminal that is connected, so that be the power supply of digital certificate security lock arrangement.
Need to prove, though ac-coupled circuit 26 shown in Fig. 2 A is connected with R channel utmost point 34a, electric weight gatherer 52 is connected with L channel utmost point 34b, but the invention is not restricted to this, as an alternative, also ac-coupled circuit 26 can be connected with L channel utmost point 34b, electric weight gatherer 52 is connected with R channel utmost point 34a.Therefore one of R channel utmost point 34a and L channel utmost point 34b can be represented with the first sound channel utmost point, and another sound channel is represented with the second sound channel utmost point.
Fig. 2 B is the structural representation according to the digital certificate security lock arrangement 100B of second embodiment of the invention.Except adopting battery 54 to substitute electric weight gatherer 52 for the power supply of digital certificate security lock arrangement, remainder is identical with the structure of the digital certificate security lock arrangement 100A shown in Fig. 2 A among Fig. 2 B.In addition, among the embodiment shown in Fig. 2 B, ac-coupled circuit 44 can be connected in the R channel utmost point, perhaps can be connected in the L channel utmost point, among Fig. 2 B R channel utmost point 34a or L channel utmost point 34b is referred to as the right side or the L channel utmost point 34.
Fig. 3 A is the structural representation of the digital certificate security lock arrangement 100C of third embodiment of the invention.Different with Fig. 2 A illustrated embodiment is that in Fig. 3 A illustrated embodiment, the audio coding decoding module is integrated in general encryption and the digital signature microcontroller 10, promptly compares with Fig. 2 A illustrated embodiment, has economized a microcontroller.As shown in Figure 3A, in digital certificate security lock arrangement 100C, general encryption and digital signature microcontroller 10 also are integrated with the first encode/decode audio signal module 28 except comprising encryption and digital signature module 12.The output signal of the first encode/decode audio signal module 28 is sent to the wheat MIC utmost point 32 of audio jack 30 by low-pass filter circuit 24 via the output of general encryption and digital signature microcontroller 10, and the first encode/decode audio signal module 28 can be passed through the R channel utmost point 34a received signal of ac-coupled circuit 26 and audio jack 30 via the input of general encryption and digital signature microcontroller 10.Electric weight gatherer 52 is connected in the L channel utmost point 34b of audio jack 30, is used for obtaining electric energy from the communication terminal that is connected, so that be the power supply of digital certificate security lock arrangement.
Need to prove, though ac-coupled circuit 26 shown in Fig. 3 A is connected with R channel utmost point 34a, electric weight gatherer 52 is connected with L channel utmost point 34b, but the invention is not restricted to this, as an alternative, also ac-coupled circuit 26 can be connected with L channel utmost point 34b, electric weight gatherer 52 is connected with R channel utmost point 34a.Therefore one of R channel utmost point 34a and L channel utmost point 34b can be represented with the first sound channel utmost point, and another sound channel is represented with the second sound channel utmost point.
Fig. 3 B is the structural representation of the digital certificate security lock arrangement 100D of fourth embodiment of the invention.Except adopting battery 54 to substitute electric weight gatherer 52 for the power supply of digital certificate security lock arrangement, remainder is identical with the structure of the digital certificate security lock arrangement 100C shown in Fig. 3 A among Fig. 3 B.In addition, among the embodiment shown in Fig. 3 B, ac-coupled circuit 44 can be connected in the R channel utmost point, perhaps can be connected in the L channel utmost point, among Fig. 3 B R channel utmost point 34a or L channel utmost point 34b is referred to as the right side or the L channel utmost point 34.
Fig. 4 A is the structural representation of the digital certificate security lock arrangement 100E of fifth embodiment of the invention.Different with Fig. 2 A illustrated embodiment is, in Fig. 4 A illustrated embodiment, low-pass filter circuit 24 is substituted by digital to analog converter (DAC) 23a, and ac-coupled circuit 26 is substituted by analog to digital converter (ADC) 23b.And remainder is identical with the structure of the digital certificate security lock arrangement 100A shown in Fig. 2 A.
ADC 23b with dashed lines frame table shows that these parts are selectable unit (SU)s among Fig. 4 A, also can not use ADC 23b in other embodiments, and the input of the first communication microcontroller 22 is directly connected in the R channel utmost point 34a of audio jack 30.
Fig. 4 B is the structural representation of the digital certificate security lock arrangement 100F of sixth embodiment of the invention.Different with Fig. 3 B illustrated embodiment is, in Fig. 4 B illustrated embodiment, low-pass filter circuit 24 is substituted by digital to analog converter (DAC) 23a, and ac-coupled circuit 26 is substituted by analog to digital converter (ADC) 23b.And remainder is identical with the structure of the digital certificate security lock arrangement 100A shown in Fig. 2 A.
ADC 23b with dashed lines frame table shows that these parts are selectable unit (SU)s among Fig. 4 A, also can not use ADC 23b in other embodiments, and the input of the first communication microcontroller 22 is directly connected in the R channel utmost point 34a of audio jack 30.
Need to prove, though all comprise built-in electric weight gatherer 52 or battery 54 among the embodiment shown in Fig. 2 A, 2B, 3A, 3B, 4A and the 4B, but, know as is known to the person skilled in the art, the digital certificate security lock arrangement also can be powered by external power supply, and need not built-in electric weight gatherer 52 or battery 54.
In operating process, the audio jack of the digital certificate security lock arrangement of the foregoing description is inserted in the audio interface of corresponding communication terminal, data message after the modulation can send communication terminal (for example mobile phone, panel computer, personal digital assistant or desktop computer etc.) to, by the processing of the second modulation module that disposes in the communication terminal, the data message that obtains reducing.Relevant this a little will be elaborated in conjunction with Fig. 5, Fig. 6 A, Fig. 6 B and Fig. 7 in the back.
Fig. 5 is the structural representation of digital certificate authentication of the present invention system.As shown in Figure 5, the digital certificate authentication system comprises digital certificate security lock arrangement 100 (for example digital certificate security lock arrangement 100,100A, 100B, 100C, 100D, 100E and the 100F shown in Fig. 1-4B), mobile communication terminal 200, certificate server 300 and communication network 400.Wherein, mobile communication terminal 200 comprises audio interface 202, the second modulation module 204 and communication module 206, and not shown but functional module that conventional mobile communication terminal had or device for example processor, memory, input/output unit etc.
In operating process, the audio jack 30 of digital certificate security lock arrangement 100 communicates to connect (being that audio jack 30 is inserted in the audio interface 202) with the audio interface 202 of mobile communication terminal 200, mobile communication terminal 200 communicates to connect by communication network 400 and certificate server 300 via communication module 206.Send communication module 206 to after the audio signal demodulation process that the second modulation module 204 is used for audio interface 202 is received, and the signal that is used for receiving from communication module 206 carries out modulation treatment with the audio signal after obtaining modulating, and sends digital certificate security lock arrangement 100 to by audio interface 202 again.
Fig. 6 A is the structural representation of first embodiment of digital certificate authentication of the present invention system.As shown in Figure 6A, the digital certificate authentication system comprises digital certificate security lock arrangement 100 (for example digital certificate security lock arrangement 100,100A, 100B, 100C, 100D, 100E and the 100F shown in Fig. 1-4B), mobile communication terminal 200, certificate server 300 and communication network 400.Wherein, mobile communication terminal 200 comprises audio interface 202, be used to carry out the second communication microcontroller 204a and communication module 206 that the Code And Decode of audio signal is handled, and not shown but functional module that conventional mobile communication terminal had or device for example processor, memory, input/output unit etc.
In operating process, the audio jack 30 of digital certificate security lock arrangement 100 communicates to connect (being that audio jack 30 is inserted in the audio interface 202) with the audio interface 202 of mobile communication terminal 200, mobile communication terminal 200 communicates to connect by communication network 400 and certificate server 300 via communication module 206.After handling, the audio signal decoding that the second communication microcontroller 204a is used for that audio interface 202 is received sends communication module 206 to, and the signal that is used for receiving from communication module 206 carries out encoding process with the audio signal after obtaining encoding, and sends digital certificate security lock arrangement 100 to by audio interface 202 again.
Fig. 6 B is the structural representation of second embodiment of digital certificate authentication of the present invention system.As shown in Figure 6, the digital certificate authentication system comprises digital certificate security lock arrangement 100 (for example digital certificate security lock arrangement 100,100A, 100B, 100C, 100D, 100E and the 100F shown in Fig. 1-4B), desktop computer 200 ', certificate server 300 and communication network 400.Wherein, desktop computer 200 ' comprises that audio interface is MIC interface 202a and earphone interface 202b, is used to carry out the second encode/decode audio signal module 204b and communication module 206 that the Code And Decode of audio signal is handled, and not shown but functional module that conventional computer had or device for example processor, memory, input/output unit etc.In the present embodiment, the audio jack of digital certificate security lock arrangement 100 comprises isolated M IC plug 32 ' and headset plug 34 '.
In operating process, the audio jack of digital certificate security lock arrangement 100 and the audio interface of desktop computer 200 ' communicate to connect (being among MIC plug 32 ' the insertion MIC interface 202a, among headset plug 34 ' the insertion earphone interface 202b), and desktop computer 200 ' communicates to connect by communication network 400 and certificate server 300 via communication module 206.The second encode/decode audio signal module 204 ' is used for sending communication module 206 to after the audio signal decoding processing that receives from MIC interface 202a, and the signal that is used for receiving from communication module 206 carries out encoding process with the audio signal after obtaining encoding, and sends digital certificate security lock arrangement 100 to by earphone interface 202b again.
In the above-described embodiments, certificate server 300 is the servers that are used for Internet bank's business, and it comprises the web of Internet bank server 302 and communicate with continuous application server 304 that application server 304 communicates to connect with database 306.In the application of the Internet bank, need to install corresponding Internet bank software on the communication terminal device (for example desktop computer 200 ' or mobile communication terminal 200).
Certificate server 300 also can be the certificate server of other purposes, carries out giving the correct time on software upgrading or the data and carry out the employed certificate server of authentication, enterprise VPN server, financial middleware server, e-commerce website login authentication server or the like in the website that the user who carries out certificate server that authentication uses, application software during personnel's Telnet parent company of the branch company database of for example transnational or geographical group company logins software supplier.
Need to prove that the mobile communication terminal 200 in Fig. 5, Fig. 6 A illustrated embodiment can be mobile terminals such as mobile phone, panel computer or personal digital assistant.In the embodiment of Fig. 6 A, the second communication microcontroller 204a also can be substituted by the second encode/decode audio signal module 204b.In the embodiment of Fig. 6 B, the second encode/decode audio signal module 204b also can be substituted by the second communication microcontroller 204a.
In addition, in each embodiment, audio jack is to select integral type headset plug or split type MIC plug to determine with the audio interface type that headset plug need be looked the communication terminal that is connected.The audio interface type that the selection of the specification of audio jack (for example 2.5mm or 3.5mm) also needs to look the communication terminal that is connected is determined.
Need to prove that also above-mentioned audio coding module 22a, audio decoder module 22b, the first encode/decode audio signal module 28 and the second encode/decode audio signal module 204b all can be realized by the combination of software, hardware, firmware or software and hardware.
For example, the encoding and decoding program that resides in above the digital certificate security lock arrangement realizes with the microcontroller programming language, resides in together in the code memory of microcontroller with other control flow.Also can design independently codec chip realization code decode algorithm.Audio coding decoding can adopt TI MSP430 series super low-power consumption microcontroller to realize.Utilize G PIO, timer and the comparator of microcontroller, can control GPIO output specific waveforms signal,, send the MIC utmost point to by obtaining being fit to the signal of voice-grade channel after the low-pass filtering.The audio signal that the L channel utmost point sends is judged the up of waveform or decline by comparator, thereby by the Vcc/2 voltage ratio decoding is obtained 0 or 1 by arriving G PIO and the comparator of MSP430 after the AC coupled.
The function that is positioned at second communication controller of communication terminal equally also can realize with software, operates in cell phone software process the inside.Also can the communication terminal operating system module or the form of driving exist, reside in the operating system firmware storage area of communication terminal.The smart mobile phone that for example uses Android operating system obtains audio sample value by the AudioRecord class from the recording of the MIC utmost point, and the rising or the decoding that descends of the positive and negative and audio volume control by judging audio sample value obtain 0 or 1.By judging that the position that needs output is the different frequency of 1 or 0 selection, utilizes sinusoidal wave function to calculate the PCM value of corresponding frequencies correspondence; The AudioTrack class of utilizing the Android platform to provide specifies L channel to play this PCM data.
In addition, communication module 206 can be wire communication module or wireless communication module, and communication network can be wireline communication network, cordless communication network, or the combination of wireline communication network and cordless communication network.
Fig. 7 is the flow chart of digital certificate authentication method of the present invention.As shown in Figure 7, in step 702, communication terminal sends logging request and is sent to certificate server by communication network.In step 704, after the logging request of certificate server received communication terminal by the communication network transmission, return the response signal that comprises a serial data.At step coding 706, the second modulation module in the communication terminal is modulated the serial data that receives.In step 708, communication terminal sends the digital certificate security lock arrangement to by the modulation signal that audio interface will comprise this serial data information.In step 710, the first modulation module in the digital certificate security lock arrangement carries out obtaining this serial data again after the demodulation process to the modulation signal that receives.In step 712, encryption in the digital certificate security lock arrangement and digital signature module are carried out ciphering signature to serial data and are obtained the ciphering signature resultant string.In step 714, the first modulation module in the digital certificate security lock arrangement is a modulation signal with this ciphering signature resultant string code conversion.In step 716, the modulation signal that the digital certificate security lock arrangement will include this ciphering signature resultant string information returns to described communication terminal by audio interface.In step 718, the second modulation module in the communication terminal carries out obtaining the ciphering signature resultant string again after the demodulation to the modulation signal that receives, and by communication network described ciphering signature resultant string is sent to described certificate server and verifies.After certificate server carried out authentication processing to the ciphering signature resultant string, in step 720, the result returned to communication terminal with login authentication.
In the present invention, all compatible processing procedure of the prior art and method are handled in ciphering signature processing in the digital certificate security lock arrangement and the checking in the certificate server, thereby repeat no more herein.
For helping to understand the present invention, below illustrate.
Digital certificate security lock arrangement of the present invention (also can be described as universal audio interface KEY, be called for short A-KEY) is provided with digital certificate ciphering signature scheduling algorithm microcontroller, and audio interface KEY connects communication terminal by audio interface.Offer communication terminal banking software developer SDK (Software Development Kit is called for short SDK).The communication terminal software developer is by calling the function among the SDK, and the data that this function will import into add that command word forms bit stream, sends to bit stream signal earphone output audio interface then.Communication microcontroller (MCU) reads the signal (optionally MODEM modulation signal) of Manchester's code from the L channel (optional R channel) of audio frequency, comparison judges 0 or 1 according to intermediate voltage, as UART RX input signal, send general ciphering signature microcontroller to then.Communication MCU is encoded to Manchester signal (optional MODEM modulation signal) equally with the output signal of general ciphering signature microcontroller and outputs to Mike (MIC) interface by low-pass filtering.
Because digital certificate security lock arrangement of the present invention has been connected to the earphone output audio interface of communication terminal by audio interface, therefore can read signal, with obtaining command word and order data behind the signal decoding, order data is adopted known Message Digest 5 (for example MD5 or the SHA1) computing of making a summary, signature computing or 3-DES cryptographic calculation etc. according to command word.Then operation result is formed bit stream, then bit stream signal is sent to the MIC interface of audio interface.SDK software above the communication terminal offers the result bits flow data above the MIC input interface banking software of installing on the communication terminal and uses.Functions such as the communication terminal banking software just can be handled the communication server that send to bank through the data behind outside independent encryption hardware (the being digital certificate security lock arrangement of the present invention) signature the transferring accounts of transaction-based requirements, remits money, inquiry.
Specifically, the audio interface plug is arranged above the digital certificate security lock arrangement, can insert the audio interface of communication terminal.During use audio jack is inserted the audio interface of communication terminal, on the communication terminal application software, select login then, the communication terminal banking software will send authentication request to certificate server, obtain the serial data response signal then, after the serial data response signal is encoded, the serial data response signal is sent to the digital certificate security lock arrangement, the digital certificate security lock arrangement to the audio decoder that receives after with bank's public key encryption and private key for user signature, again with behind the ciphering signature result coding, send the communication terminal banking software to, software reads the operation result of decoded digital certificate security lock arrangement, sends to the certificate server of bank then.Bank's certificate server utilizes private key deciphering, and determines whether to be validated user that so far secure log is finished after using user's public key verifications to sign.Functions such as other transfer accounts, remit money, inquiry can be done similar safety verification and signature equally.
In the present invention, the main effect of communication microcontroller has 2 points: a) finish the modulation of audio signal to digital signal; B) digital signal is transmitted to general encryption and digital signature microcontroller by the UART/USB/i2C/ interface.For example the requirement that sends over above of communication terminal is carried out the MD5 computing to one piece of data, the communication microcontroller obtains audio signal from L channel, and is right according to the level ratio of signal, obtains 01bit stream, by the requirement of general digital signature and encryption microcontroller, send to its USB port then.General digital signature and encryption microcontroller just obtain the MD5 request instruction and want the data of computing above the USB input, by the MD5 algorithm of inside solidification data are obtained the MD5 digest value.
In fact general encryption and digital signature microcontroller comprise an intelligent card chip and a FLASH memory.Intelligent card chip hardware has solidified MD5 or SHA1 digest algorithm, also is solidified with the hardware algorithm of signature, certifying signature, data encryption and the data decryption of public, private key system (PKI) simultaneously.For the sake of security, user's digital certificate (PKI), private key etc. are the FLASH memory the insides that is kept at general encryption and digital signature microcontroller.Required algorithm routine and the data such as certificate, private key of PKI all are independently to be kept in this hardware like this, can prevent hacker attacks.
For example, audio coder will become 0,1 digital signal encoding the signal (20～20000 hertz) of audio frequency that can be by the voice band line transmission, digital signal can be encoded into the audio signal of Manchester's code, also can be encoded into Bell 202 MODEM (
Http: ∥ en.wikipedia.org/wiki/ Bell_202_modem) signal.The process of audio decoder is opposite.This function also can be realized by the communication microcontroller.For example, audio coder and audio decoder can be audio coding program and the audio decoder programs of moving on the communication microcontroller, also can be the audio coding decoding program that is solidificated on the communication microcontroller, can also be the audio codec of making hardware.The coding and decoding algorithm can be a lot, as Manchester code, Morse code and the employed coding-decoding method of MODEM modulation that dials up on the telephone.
On communication terminal, also be provided with corresponding audio coder and audio decoder.For example, audio coder and audio decoder can be audio coding program and the audio decoder programs of moving on communication terminal, also can be the audio coding decoding programs that is solidificated on the communication terminal, can also be the audio codec audio frequency of making hardware.This encoder becomes 10 with 0, becomes 01 with 1, then 10,01 and so on data is sent to digital to analog converter, thereby arrives the digital certificate security lock arrangement by L channel.
Below provide the example that the user logins necessary process:
A) communication terminal sends logging request to logon server;
B) server returns a random digit " 123456789 ";
C) communication terminal obtains after this random digit its audio coder of giving the communication terminal end, and audio coder is encoded it, and is played to L channel;
D) the communication microcontroller of A-KEY obtains audio signal from L channel, and decoding obtains digital signal, and digital signal is sent in the USB input of general encryption and digital signature microcontroller;
E) the general encryption of A-KEY and digital signature microcontroller carry out the encrypted private key computing to random digit " 123456789 ", and " 25d55ad283aa400af464c76d713c07ad " outputs to interface with operation result;
F) the communication microcontroller of A-KEY obtains the signature result above USB, with result's coding, and sends to the MIC interface;
G) the audio decoder software that moves in the communication terminal obtains audio signal above MIC, be decoded as numerical data " 25d55ad283aa400af464c76d713c07ad ", and these data are sent to logon server;
H) logon server obtains data " 25d55ad283aa400af464c76d713c07ad ", uses user's PKI to be decrypted, if successful decryption represents that so this user is exactly the user who states in the public key certificate, logins successfully.
To sum up, the present invention relates to the outer relay part (being the digital certificate security lock arrangement) of a kind of communication terminal, can realize the hardware digital signature by the universal audio interface, hardware security key independently when becoming operation such as communication terminal is logined, paid, shopping reaches and the similar level of security of PC PC communication terminal.The present invention mainly solves the scope of application restricted problem of present USB KEY.In addition, the invention still further relates to and a kind ofly comprise the digital certificate authentication system of this digital certificate security lock arrangement and utilize this digital certificate security lock arrangement to carry out the method for digital certificate authentication.
Claims (10)
1. a digital certificate security lock arrangement comprises general encryption and digital signature microcontroller, and it is provided with encrypts and digital signature module and the memory that is used to store digital certificate and key and enciphering and deciphering algorithm; It is characterized in that, also comprise:
Audio jack, it has the MIC utmost point and the first sound channel utmost point; And
The first modulation module, be used for spreading out of, and be used for signal to the first sound channel utmost point that is received from described audio jack and carry out demodulation and after obtaining data message, be sent to described encryption and digital signature module modulating with the MIC utmost point by described audio jack from the data message of described encryption and digital signature module.
2. digital certificate security lock arrangement according to claim 1, it is characterized in that, the described first modulation module comprises with described general encryption and digital signature micro-controller communications and linking to each other, be used to carry out the first communication microcontroller that the Code And Decode of audio signal is handled, and ac-coupled circuit and low-pass filter circuit, wherein, the output of the described first communication microcontroller is connected in the MIC utmost point of described audio jack by low-pass filter circuit, and the input of the described first communication microcontroller is connected in the first sound channel utmost point of described audio jack by ac-coupled circuit.
3. digital certificate security lock arrangement according to claim 1, it is characterized in that, the described first modulation module comprises with described general encryption and digital signature micro-controller communications and links to each other, is used to carry out the first communication microcontroller and first digital to analog converter that the Code And Decode of audio signal is handled, wherein, the output of the described first communication microcontroller is connected in the MIC utmost point of described audio jack by described first digital to analog converter, and the input of the described first communication microcontroller is connected in the first sound channel utmost point of described audio jack.
4. digital certificate security lock arrangement according to claim 3, it is characterized in that, the described first modulation module also comprises first analog to digital converter, and the input of the described first communication microcontroller is connected in the first sound channel utmost point of described audio jack by described first analog to digital converter.
5. digital certificate security lock arrangement according to claim 1, it is characterized in that, the described first modulation module comprises ac-coupled circuit, low-pass filter circuit and is integrated in the first encode/decode audio signal module on described general encryption and the digital signature microcontroller, wherein, the output of described general encryption and digital signature microcontroller is connected in the MIC utmost point of described audio jack by low-pass filter circuit, and the input of described general encryption and digital signature microcontroller is connected in the first sound channel utmost point of described audio jack by ac-coupled circuit.
6. digital certificate security lock arrangement according to claim 1, it is characterized in that, the described first modulation module comprises first digital to analog converter and is integrated in the first encode/decode audio signal module on described general encryption and the digital signature microcontroller, wherein, the output of described general encryption and digital signature microcontroller is connected in the MIC utmost point of described audio jack by described first digital to analog converter, and the input of described general encryption and digital signature microcontroller is connected in the first sound channel utmost point of described audio jack.
7. digital certificate security lock arrangement according to claim 6, it is characterized in that, the described first modulation module also comprises first analog to digital converter, and the input of described general encryption and digital signature microcontroller is connected in the first sound channel utmost point of described audio jack by described first analog to digital converter.
8. a digital certificate authentication system is characterized in that, comprising:
As each described digital certificate security lock arrangement in the claim 1 to 7;
The communication terminal that has audio interface and communication module, described communication terminal are provided with the second modulation module of the modulation that is used to carry out audio signal;
Certificate server;
Wherein, the audio jack of described digital certificate security lock arrangement and the audio interface of described communication terminal communicate to connect, and described communication terminal communicates to connect by communication network and described certificate server via described communication module.
9. digital certificate authentication according to claim 8 system, it is characterized in that, described communication terminal comprises mobile phone, computer or the personal digital assistant that Internet bank's software is installed, described certificate server comprises the web of Internet bank server and communicates with continuous application server that described application server is connected with database communication.
10. a digital certificate authentication method is characterized in that, may further comprise the steps:
The logging request that certificate server received communication terminal sends by communication network is also returned the response signal that comprises a serial data;
After the described response signal modulation that described communication terminal will receive, and send the digital certificate security lock arrangement to by audio interface;
Described digital certificate security lock arrangement carries out obtaining described serial data again after the demodulation to the received signal, and described serial data is carried out ciphering signature obtains the ciphering signature resultant string;
Described digital certificate security lock arrangement returns to described communication terminal by audio interface after described ciphering signature resultant string is modulated;
Again obtain described ciphering signature resultant string after the demodulation to the received signal of described communication terminal, and by communication network described ciphering signature resultant string is sent to described certificate server and verifies.
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| CN2011101930822A CN102255730A (en) | 2011-07-11 | 2011-07-11 | Digital certificate safety lock device and digital certificate authentication system and method |
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Application publication date: 20111123 |