CN102075928A - Intelligent terminal, receiving end and method for countersigning by using intelligent terminal - Google Patents
Intelligent terminal, receiving end and method for countersigning by using intelligent terminal Download PDFInfo
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- CN102075928A CN102075928A CN2011100066556A CN201110006655A CN102075928A CN 102075928 A CN102075928 A CN 102075928A CN 2011100066556 A CN2011100066556 A CN 2011100066556A CN 201110006655 A CN201110006655 A CN 201110006655A CN 102075928 A CN102075928 A CN 102075928A
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- countersign
- digital watermarking
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- watermark
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
- H04L9/3247—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
- G06T1/0021—Image watermarking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
- H04L2209/60—Digital content management, e.g. content distribution
- H04L2209/608—Watermarking
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Abstract
The invention provides a method for countersigning by using an intelligent terminal. The method comprises the following steps of: receiving a signature of a countersigner; adding the signature into a file to be countersigned; and making a digital watermark, adding the digital watermark into the file by using a preset algorithm, and sending the file to a countersignature receiving party. The invention also provides the intelligent terminal and a digital watermark receiving end. The countersignature is high in confidentiality, perfect in portability and strong in universality.
Description
Technical field
The present invention relates to moving communicating field, the method that relates in particular to a kind of intelligent terminal, receiving terminal and utilize intelligent terminal to conutersign.
Background technology
Terminal is through 20 years of development, and function is more and more stronger, has nowadays developed into the intelligent terminal stage.The function of peripheral hardware is more and more stronger, and the processing speed of chip is more and more faster, and the capacity of internal memory is increasing, can realize many functions of originally wanting to realize but not realizing.As high-end intelligent terminal, its office miscellaneous function more and more has been subjected to business people's favor.
Transaction frequent, many times need signature, affix one's seal, when the countersign people travels outside can't handle face to face the time, can only by mail send file to be signed-＞print-＞countersign people signature-＞fax back and has signed file or scanned the mode of having signed file and having passed back with mail, if the receipt of mail, fax is counterfeit by the people, will cause great loss to business activity.
In a word, present strange land literal can be signed with following defective:
1, easily counterfeit;
2, portable devices is poor, and printer, scanner can't be carried, and often occurs the situation that ground of living in can not find on every side;
3, a little less than the promptness, because the second defective causes a lot of files not sign at once and beams back.
Digital watermark technology is false proof and a direction of field of information security technology, and it is based on the non-cipher mechanism Information Hiding Techniques of content, revises embed watermark information by the content of media data is made trace, thereby reaches the target of Information hiding.The watermark that embeds can be come out by special technical software or instrument detecting, as the foundation of authentication, and very suitable digitlization countersign.
Existing medium add digital watermark following defective:
1, processing speed.The algorithm that adds watermark is complicated more, and the watermark data of interpolation is many more, and processing speed is slow more.If use professional instrument to add digital watermarking, then cost is higher; If use general processor, then the reaction time longer, be difficult to allow the user satisfied.
2, portable, versatility.It much is FPGA or ASIC that special watermark instrument is handled core, function singleness, and should not carry.
3, watermark kind is single.Existing a lot of digital watermarking all is one group of password or is kept at width of cloth picture in the memory etc.
4, means of transportation.Prior art much is to utilize individual PC to add watermark, pass by cable broadband again, in case to the place of inconvenient wiring logging-on function will be restricted.
5, a user group of mean people.Because the existence of above-mentioned four defectives causes present digital watermarking range of application in daily business activity to be restricted, more be to be used in aspects such as intellectual property is anti-piracy.
Summary of the invention
The objective of the invention is to the method that proposes a kind of intelligent terminal, receiving terminal and utilize intelligent terminal to conutersign, strengthen that countersign is portable, promptness.
In order to address the above problem, the invention provides a kind of method of utilizing intelligent terminal to conutersign, comprise;
Receive countersign people's signature, described signature is joined in the file to be signed;
Make digital watermarking, described digital watermarking is joined in the described file by preset algorithm, described file is sent to the countersign recipient.
Further, described method also comprises: the described digital watermarking information needed of collection of material, described information comprise one of following or its combination: a kind of or its combination in password, handwritten signature, acoustic information, the image information.
Further, described acoustic information is described countersign people's voice, and described image information is described countersign people's a resemblance.
Further, before the described digital watermarking information needed of collection of material, also receive the digital watermarking level of security that described countersign people selects, determine the information that needs are gathered according to described digital watermarking level of security.
Further, described method also comprises:
After described countersign recipient receives described file, extract digital watermarking from described file, the countersign people watermark information that prestores with this locality compares, output countersign result.
The present invention also provides a kind of intelligent terminal, and described intelligent terminal comprises;
The signature module is used to receive countersign people's signature, and described signature is joined in the file to be signed;
Watermark generation module is used to make digital watermarking;
The watermark merge module is used for described digital watermarking is joined described file by preset algorithm;
File send module is used for described file is sent to the countersign recipient.
Further, above-mentioned intelligent terminal also can have following characteristics, described intelligent terminal also comprises: information acquisition unit, be used for the described digital watermarking information needed of collection of material, described information comprises one of following or its combination: a kind of or its combination in password, handwritten signature, acoustic information, the image information.
Further, above-mentioned intelligent terminal also can have following characteristics, and described information acquisition unit comprises one of audio input device, video input apparatus, human-computer interaction device or its combination.
Further, above-mentioned intelligent terminal also can have following characteristics, and described acoustic information is described countersign people's voice, and described image information is described countersign people's a resemblance.
Further, above-mentioned intelligent terminal also can have following characteristics, and described intelligent terminal also comprises the level of security selected cell, wherein:
Described level of security selected cell is used for: receive the digital watermarking level of security that described countersign people selects;
Described information acquisition unit also is used for: determine the information that needs are gathered according to described digital watermarking level of security.
The present invention also provides a kind of digital watermarking receiving terminal, comprising:
The watermark extracting module after being used to receive countersign people's file, is extracted digital watermarking from described file;
The watermark stores module is used for storage countersign people watermark information;
Watermark contrast module is used for the countersign people watermark information that the digital watermarking and the described watermark stores module of described digital watermarking extraction module extraction are stored is compared, and obtains conutersigning the result;
The output equipment module is used to export described countersign result.
The present invention has following effect:
The confidentiality height of countersign, the digital watermarking highest level is the personal information feature, other people are difficult to counterfeit;
Processing speed is fast, and present intelligent terminal chip dominant frequency can reach 500MHZ even higher, and image processing has also had special built in hardware module, and the speed that makes watermark generate, embed improves greatly, can satisfy the user experience requirement fully;
Portable, highly versatile, whole flow processs of countersign people only need an intelligent terminal to finish;
Popularization is strong, being extensive use of of terminal, and the raising of intelligent terminal occupation rate of market all can be used this method;
The digital watermarking kind is abundant, provides multiple rank, polytype, the digital watermarking of multiple embedding algorithm;
Transmit simply, use the wider wireless network of coverage, need not to rely on cable network.
The present invention can be used for approval file and encrypts transmission, application such as individual authentication.
Description of drawings
Fig. 1 is a system block diagram of the present invention;
Fig. 2 is that embodiment of the invention digital watermarking generates key diagram;
Fig. 3 is that algorithmic descriptions figure is added in the digital watermarking that the present invention is correlated with;
Fig. 4 is that transmitting terminal watermark of the present invention generates, embeds process chart;
Fig. 5 is the receiving terminal watermark of the present invention calcellation flow chart that comes into force.
Embodiment
The invention provides a kind of method of utilizing intelligent terminal to conutersign, comprise;
Receive countersign people's signature, described signature is joined in the file to be signed; Make digital watermarking, described digital watermarking is joined in the described file by preset algorithm, described file is sent to the countersign recipient;
After described countersign recipient receives described file, extract digital watermarking from described file, the countersign people watermark information that prestores with this locality compares, output countersign result.
Wherein, file described to be signed can obtain from this locality, perhaps issues the countersign people by countersign the opposing party.
Wherein, described method also comprises: the described digital watermarking information needed of collection of material, described information comprise one of following or its combination: a kind of or its combination in password, handwritten signature, acoustic information, the image information.
Wherein, described acoustic information is described countersign people's voice, and described image information is described countersign people's a resemblance.
Wherein, before the described digital watermarking information needed of collection of material, also receive the digital watermarking level of security that described countersign people selects, determine the information that needs are gathered according to described digital watermarking level of security.Certainly, can not select yet, directly press default setting, gather the information issuing digital watermarking of acquiescence.
The invention provides a kind of intelligent terminal, described intelligent terminal comprises;
The signature module is used to receive countersign people's signature, and described signature is joined in the file to be signed;
Watermark generation module is used to make digital watermarking;
The watermark merge module is used for described digital watermarking is joined described file by preset algorithm;
File send module is used for described file is sent to the countersign recipient.
Wherein, described intelligent terminal also comprises: information acquisition unit, be used for the described digital watermarking information needed of collection of material, and described information comprises one of following or its combination: a kind of or its combination in password, handwritten signature, acoustic information, the image information.
Wherein, described information acquisition unit comprises one of audio input device, video input apparatus, human-computer interaction device or its combination.
Wherein, described acoustic information is described countersign people's voice, and described image information is described countersign people's a resemblance.Certainly, also can be other sound or the image information that both sides appoint.
Wherein, described intelligent terminal also comprises the level of security selected cell:
Described level of security selected cell is used for: receive the digital watermarking level of security that described countersign people selects;
Described information acquisition unit also is used for: determine the information that needs are gathered according to described digital watermarking level of security.
The present invention also provides a kind of digital watermarking receiving terminal, comprising:
The watermark extracting module after being used to receive countersign people's file, is extracted digital watermarking from described file;
The watermark stores module is used for storage countersign people watermark information;
Watermark contrast module is used for the countersign people watermark information that the digital watermarking and the described watermark stores module of described digital watermarking extraction module extraction are stored is compared, and obtains conutersigning the result;
The output equipment module is used to export described countersign result.
Further specify the present invention below by specific embodiment.
The present invention includes intelligent terminal and receiving terminal messaging device, wherein: intelligent terminal comprises:
(1) intelligent terminal is used process chip;
(2) video input apparatus, such as, high pixel terminal camera;
(3) human-computer interaction device comprises touch-screen, keyboard etc.;
(4) audio input device, such as, microphone;
Wherein, intelligent terminal is used and is comprised several modules in the process chip: text input, processing module, image processing module (can provide the file, picture of signing clearly, can extract countersign people appearance feature), audio processing modules (can extract countersign people sound feature), watermark generation module, the watermark merge module.
The receiving terminal messaging device both can be a PC, can be a station server also, comprised as lower module: watermark extracting module, watermark stores module, watermark contrast module, output equipment module.
Communicate by network between intelligent terminal and receiving device, include but not limited to GPRS, 3G net.The specific implementation step is as follows:
Can send described file by lettergram mode, or other modes send, such as real-time transmission.
Step 102, the countersign people joins oneself signature by text editing on intelligent terminal and waits to sign in the file;
Step 103, the countersign people selects the digital watermarking level of security of this transmission on intelligent terminal;
The watermark level of security can be high, normal, basic Three Estate, and the rudimentary password of just inputing is as authentication; Middle rank utilizes handwritten signature as authentication; The senior personal characteristics of utilizing is as authentication, as face outlines, sound characteristic etc.; More level of securitys can certainly be set as required, perhaps according to other information setting level of securitys, such as, above-mentioned information being combined the more high-grade level of security of setting, specifically can decide as required, the present invention does not limit this.
Step 104 according to selected digital watermarking level of security, is made the respective digital watermark;
Step 105 joins digital watermarking in the middle of the file to be passed back by certain algorithm, and described file is beamed back countersign flow process promoter;
Can send described file by lettergram mode, or other modes send, such as real-time transmission.
Step 106, whether the promoter carries out digital watermarking to the receipt file of receiving and extracts detection, contrasts with the countersign people watermark information that prestores in the device databases, detects successfully then authentication success, do not become then this failure according to circumstances to select will beam back again to hold.
Certainly, also execution in step 101 not, the countersign people sends to the countersign recipient after watermark is signed, added to local file.
Enforcement to technical scheme will describe in further detail in conjunction with the accompanying drawings below.
Fig. 1 is a system block diagram of the present invention, comprises intelligent terminal 101, receiving terminal messaging device 102, GPRS/3G air interface 103 and cable network 104.
Wherein intelligent terminal 101 comprises: the touch-screen 105 that man-machine interaction is used, keyboard 106, microphone 107, camera 108, intelligent use processor external member 109.Touch-screen 105 and keyboard 106 are all as touch input equipment, and on some full intelligent terminal that touches, keyboard 106 is not indispensable.Microphone 107 is used to gather acoustic information, and camera 108 is used for images acquired information, recommends to use the camera of high pixel, and the clear picture that collects like this is accurate, is convenient to identification.Intelligent use processor external member 109 is cores of intelligent terminal, in comprise text input, processing module, audio processing modules, image processing module, watermark generation module, watermark merge module and file send module.
Receiving terminal messaging device 102 can be a PC, also can be equipment or equipment group that a station server or a sets of computer or the like can provide the big capacity storage function of supercomputing.Receiving terminal messaging device 102 need be received on the network, and it comprises watermark extracting module 110, watermark stores module 111, watermark contrast module 112 and output equipment module 113.Watermark merge module in watermark extracting module 110 and the intelligent use processor external member 109 provides reverse computing in order to extract digital watermarking.Watermark stores module 111 provides the countersign people information that stores in advance, for example person's handwriting, individual face feature, sound characteristic or termination number (a kind of mode of password watermark) etc.Watermark contrast module 112 compares the digital watermarking of watermark extracting module 110 extractions and the information in the watermark stores module 111, judges whether the digital watermarking that gets access to is effective.The final result of judging is by the promoter of output output equipment module 113 notice countersign flow processs, and the form of output equipment module 113 has a lot, informs such as display, digital prompt sound or note.
GPRS/3G air interface 103 includes but not limited to GPRS/EDGE/WCDMA/CDMA/WIFI, includes all 2G, 3G and new from now on communication standards at present in a word.
Cable network 104 is not essential, if the receiving terminal messaging device can directly obtain information from wireless air interface, cable network 104 can be omitted.
Fig. 2 is that a digital watermarking generates key diagram for example.When to select the digital watermarking level of security be low, the watermark that accesses to your password, modal a kind of mode no longer describes in detail here; In the time of in selection digital watermarking level of security is, can select individual person's handwriting 201 to generate digital watermarkings; When to select the digital watermarking level of security be high, can select to use personal characteristics to generate digital watermarking.As shown in Figure 2,203 pairs of intelligent terminals of user 101 are spoken, and intelligent terminal 101 collects acoustic information, generates the digital watermarking 204 that comprises the user voice feature; User 203 uses 101 pairs of intelligent terminals oneself to take pictures, and generates the digital watermarking 205 that comprises user's macroscopic features.
Fig. 3 is that algorithmic descriptions figure is added in a digital watermarking for example.The digital watermarking that generates can be described as one group of signal flow.The byte length of watermark signal is write in the reserve bytes of image file header part to be protected; then watermark signal is converted into the binary data code stream; with each byte of image file view data to be protected part high 7 successively behind the XOR again with above-mentioned binary data code stream XOR after the result write lowest order, add the view data output of watermark signal the most at last.Algorithm is added in watermark applicatory among the present invention has a lot, and relevant both at home and abroad patent is many, does not add detailed description at this.
Fig. 4 is that the transmitting terminal watermark generates, embeds process chart.At first, the countersign flow process the promoter by network will be to be conutersigned file send to the countersign people intelligent terminal in.After the countersign people receives file, use intelligent terminal in the enterprising edlin countersign of file.After signature is finished, will select the rank to watermark encrypting, and select when rudimentary, cipher mode such as access to your password; When selecting middle rank, use modes such as individual person's handwriting; Select when senior, just use the mode of personal characteristics.Password input is finished or the input of individual person's handwriting is finished, or after the personal characteristics collection finishes, makes digital watermarking.Made digital watermarking, digital watermarking has been added in the file into to be protected, after embedding is finished file has been beamed back.
Fig. 5 is receiving terminal watermark inspection process figure of the present invention.After receiving terminal messaging device among Fig. 1 is received file, use watermark extracting module 110 that digital watermarking is extracted, then with watermark stores module 111 in the countersign people watermark information that provides contrast.For example, this flow process has adopted the personal voice cipher mode of high encryption, then provides the countersign voice message that retains in advance to cease as a comparison in the database.If the comparing result unanimity, then watermark is effectively, signs successfully, and this signature comes into force; Whether if comparing result is inconsistent, then watermark is invalid, and this conutersigns calcellation, according to circumstances see and will notify transmit leg to retransmit.
Flow process with once countersign is an example, specifies the present invention:
A file needs signature, but has the people of signature authority to go on business in the other places, and at this moment, the promoter of countersign flow process can send to file on the countersign people terminal.The people is after seeing file on the terminal in countersign, can be on terminal editing picture or keyboard typing, own agreement or dissenting suggestion are write in the file.After finishing, terminal ejects the interface, allows the user select to use which kind of other watermark encrypting of level.Specifically comprise a low middle Senior Three rank, low-level watermark is provided with simply, and authentication speed is fast, for example accesses to your password; Other watermark confidentiality of middle rank is high slightly, for example uses the touch-screen handwritten signature as watermark; High level watermark good confidentiality is utilized the individual subscriber feature, Ge Ren face mask for example, and the frequency domain character of sound the etc. when individual says " agreements " two words, other people are very difficult to imitate.Content is down reserved and stored to the watermark of encrypting with countersign receiving terminal messaging device before should being, the password of for example deciding through consultation, and the person's handwriting of keeping, the face mask when oneself is taken one's hat off is the frequency domain character of sound etc. during " agreement " two words in other words.After having selected the digital watermarking level of security, next generate digital watermarking.According to the difference of front option, the user utilizes keyboard, touch-screen, Mike or the camera collection corresponding information of terminal to make digital watermarking.Complete, digital watermarking is embedded in the file that to encrypt, send by network and go back.After receiving device is received file, utilize and the opposite algorithm of embedding algorithm, digital watermarking is extracted.Algorithm can decide through consultation in advance, in the time of also can terminal encryption, cryptographic algorithm be write in the file header, carries out self adaptation after being detected by receiving device.Digital watermarking extract with the watermark stores module in preserve compare, whether identical then digital watermarking is effective, inequalityly just cancels, and the result is presented on the human-computer interaction interface, allow the promoter of countersign flow process select to need to allow the countersign people resend.
The present invention also provides a kind of digital watermarking receiving terminal, comprising:
The watermark extracting module after being used to receive countersign people's file, is extracted digital watermarking from described file;
The watermark stores module is used for storage countersign people watermark information;
Watermark contrast module is used for the countersign people watermark information that the digital watermarking and the described watermark stores module of described digital watermarking extraction module extraction are stored is compared, and obtains conutersigning the result;
The output equipment module is used to export described countersign result.
The present invention utilizes the nowadays powerful information processing capability of intelligent terminal chip, finishes the function that transmits digital watermarking, transmits fail safe, the false proof anti-purpose of emitting to reach enhancing information.Often travel outside for those, be difficult for finding the printer scanning machine, the personage who but has a lot of things to sign, intelligent terminal provided by the invention will become the good assistant of their business office.
The present invention can be used for approval file and encrypts transmission, authorizes and reads, application such as personal information authentication.
Claims (11)
1. a method of utilizing intelligent terminal to conutersign is characterized in that, comprising:
Receive countersign people's signature, described signature is joined in the file to be signed;
Make digital watermarking, described digital watermarking is joined in the described file by preset algorithm, described file is sent to the countersign recipient.
2. the method for claim 1, it is characterized in that, described method also comprises: the described digital watermarking information needed of collection of material, described information comprise one of following or its combination: a kind of or its combination in password, handwritten signature, acoustic information, the image information.
3. method as claimed in claim 2 is characterized in that, described acoustic information is described countersign people's voice, and described image information is described countersign people's a resemblance.
4. as claim 2 or 3 described methods, it is characterized in that, before the described digital watermarking information needed of collection of material, also receive the digital watermarking level of security that described countersign people selects, determine the information that needs are gathered according to described digital watermarking level of security.
5. the method for claim 1 is characterized in that, described method also comprises:
After described countersign recipient receives described file, extract digital watermarking from described file, the countersign people watermark information that prestores with this locality compares, output countersign result.
6. an intelligent terminal is characterized in that, described intelligent terminal comprises;
The signature module is used to receive countersign people's signature, and described signature is joined in the file to be signed;
Watermark generation module is used to make digital watermarking;
The watermark merge module is used for described digital watermarking is joined described file by preset algorithm;
File send module is used for described file is sent to the countersign recipient.
7. intelligent terminal as claimed in claim 6, it is characterized in that, described intelligent terminal also comprises: information acquisition unit, be used for the described digital watermarking information needed of collection of material, described information comprises one of following or its combination: a kind of or its combination in password, handwritten signature, acoustic information, the image information.
8. intelligent terminal as claimed in claim 7 is characterized in that, described information acquisition unit comprises one of audio input device, video input apparatus, human-computer interaction device or its combination.
9. intelligent terminal as claimed in claim 7 is characterized in that, described acoustic information is described countersign people's voice, and described image information is described countersign people's a resemblance.
10. as claim 7,8 or 9 described intelligent terminals, it is characterized in that described intelligent terminal also comprises the level of security selected cell, wherein:
Described level of security selected cell is used for: receive the digital watermarking level of security that described countersign people selects;
Described information acquisition unit also is used for: determine the information that needs are gathered according to described digital watermarking level of security.
11. a digital watermarking receiving terminal is characterized in that, comprising:
The watermark extracting module after being used to receive countersign people's file, is extracted digital watermarking from described file;
The watermark stores module is used for storage countersign people watermark information;
Watermark contrast module is used for the countersign people watermark information that the digital watermarking and the described watermark stores module of described digital watermarking extraction module extraction are stored is compared, and obtains conutersigning the result;
The output equipment module is used to export described countersign result.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100066556A CN102075928A (en) | 2011-01-13 | 2011-01-13 | Intelligent terminal, receiving end and method for countersigning by using intelligent terminal |
| PCT/CN2011/074085 WO2012094861A1 (en) | 2011-01-13 | 2011-05-16 | Intelligent terminal, receiving end, and method for performing countersigning using intelligent terminal |
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| CN2011100066556A CN102075928A (en) | 2011-01-13 | 2011-01-13 | Intelligent terminal, receiving end and method for countersigning by using intelligent terminal |
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| CN103002424A (en) * | 2012-12-31 | 2013-03-27 | 北京金和软件股份有限公司 | Data processing system of short messages |
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| CN109640018A (en) * | 2018-12-12 | 2019-04-16 | 北京无线天利移动信息技术股份有限公司 | A kind of evidence collection method and system insured for electronization |
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| TWI509459B (en) * | 2014-01-03 | 2015-11-21 | Trade Van Information Services Co | Colud electronic notary service method and system thereof |
| CN108053185A (en) * | 2017-12-27 | 2018-05-18 | 北京福田戴姆勒汽车有限公司 | The password of Engineering Change Management information system countersigning method and system |
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| CN1991901A (en) * | 2005-12-31 | 2007-07-04 | 北京华旗数码影像技术研究院有限责任公司 | Method and device for embedding finger water-print information |
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| US20090128859A1 (en) * | 2007-11-21 | 2009-05-21 | Brenda Daos | System and method for generating watermarks on electronic documents |
| CN101872420A (en) * | 2010-06-10 | 2010-10-27 | 石明霞 | Encrypted writing signing mobile terminal |
| CN201674561U (en) * | 2010-06-10 | 2010-12-15 | 石明霞 | Mobile terminal for manual signing capable of being encrypted |
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| CN102609834A (en) * | 2012-02-01 | 2012-07-25 | 昆山百润科技有限公司 | Countersigning method and system |
| CN103002424A (en) * | 2012-12-31 | 2013-03-27 | 北京金和软件股份有限公司 | Data processing system of short messages |
| CN105391911A (en) * | 2014-09-05 | 2016-03-09 | 阿里巴巴集团控股有限公司 | Fax implementation method, device and system |
| CN105391911B (en) * | 2014-09-05 | 2018-09-11 | 阿里巴巴集团控股有限公司 | Fax implementation method, device and system |
| CN109640018A (en) * | 2018-12-12 | 2019-04-16 | 北京无线天利移动信息技术股份有限公司 | A kind of evidence collection method and system insured for electronization |
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