CN108108632A - A kind of multifactor file watermark generation extracting method and system - Google Patents
A kind of multifactor file watermark generation extracting method and system Download PDFInfo
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- CN108108632A CN108108632A CN201711237184.3A CN201711237184A CN108108632A CN 108108632 A CN108108632 A CN 108108632A CN 201711237184 A CN201711237184 A CN 201711237184A CN 108108632 A CN108108632 A CN 108108632A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000000605 extraction Methods 0.000 claims description 13
- 238000010586 diagram Methods 0.000 description 4
- 230000002441 reversible effect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
- G06F21/6209—Protecting access to data via a platform, e.g. using keys or access control rules to a single file or object, e.g. in a secure envelope, encrypted and accessed using a key, or with access control rules appended to the object itself
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
- G06F21/106—Enforcing content protection by specific content processing
- G06F21/1063—Personalisation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
- G06F21/16—Program or content traceability, e.g. by watermarking
Abstract
The invention discloses a kind of multifactor file watermark generation extracting methods, by to user's client information, include the acquisition of information of mobile terminal, application information and user information, according to user's client information, the sensitive information generated at random and distribution sequence number generation digital watermarking, in the file that digital watermark embedding is distributed, by accessing file content by logging in specific user during the information in user's client information sum number word watermark is matched in mobile terminal come application program on the mobile terminal device.After file is leaked, by comparing the sensitive information obtained in reserved sensitive information and digital watermarking in the database, to judge whether the content of file watermark is true, so as to the source of the trace files of preparation.
Description
Technical field
The present invention relates to field of computer information security, for the distribution of file highly effective and safe and effective tracking of file,
Specifically, it is related to a kind of multifactor file watermark generation extracting method and system.
Background technology
With the development of mobile terminal technology, mobile terminal becomes increasingly popular, and is widely applied to enterprise mobile working ring
In border.In enterprise mobile working, the distribution of enterprise document is carried out by managing system, can realize that efficient information is shared, and has
Imitate enterprise office efficiency.
Simultaneously as enterprise document usually contains enterprise's sensitive information, application of the mobile terminal in enterprise mobile working
Exacerbate the leakage of enterprise's sensitive information, as mobile subscriber actively reveal enterprise document, apply it is unwitting in user
Leakage enterprise document, the security breaches of mobile terminal are utilized diffusion for causing enterprise document etc..How to ensure that enterprise document can
It is one of major issue that enterprise mobile working needs solve by distributing and tracking.
In order to ensure that file in the safe to use of terminal, can stamp digital watermarking using file digital watermark to file.It is existing
There is the method for thering is the conversion based on file format to provide a kind of online preview of file in technology, but this method needs progress more
The conversion of secondary file format, it is less efficient, and realized based on PC machine, mobile terminal can not be applied to well；It is and another
Multi-layer framework based on cryptographic algorithm realizes embedding algorithm and extraction, but its algorithm steps is more, and is a kind of pervasive
The algorithm of property, is not realized for the characteristics of mobile terminal, therefore efficiency on mobile terminals and security are short of.
In view of this, it is special to propose the present invention.
The content of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies of the prior art and provide a kind of multifactor file watermark life
Into extracting method.By to user's client information, including the acquisition of information of mobile terminal, application information and user information, root
According to user's client information, the sensitive information generated at random and distribution sequence number generation digital watermarking, by digital watermark embedding distribution
In file, by matching the information in user's client information sum number word watermark in mobile terminal come the application journey on this mobile terminal
In sequence file content is accessed by logging in specific user.
In order to solve the above technical problems, the basic conception of the technical solution adopted by the present invention is：
A kind of multifactor file watermark generation extracting method, including：
User's client information is obtained, digital watermarking is generated according to user's client information, digital watermarking is inseparable to be attached to point
In the file of hair,
When user terminal opens file, in the user terminal acquisition of information file in matching user's client information and digital watermarking
Hold, user's client information includes at least terminal device information and application information.
Further, digital watermarking is embedded in distribution single cent part.
Further, the sensitive information generated when also including distribution of document in digital watermarking, wherein being sentenced according to sensitive information
Whether disconnected digital watermarking is tampered.
Further, further include, key-pair file is generated according to user's client information and digital watermarking is encrypted；
When user terminal opens file, match secret key decryption file described in user terminal information acquisition and obtain file content.
Further, further include, by the sensitive information generated in distribution of document storage in the database, deposited by comparing
Whether the sensitive information in the digital watermarking that the sensitive information reconciliation ciphertext part of storage in the database obtains is consistent, judges digital water
Whether print is changed.
Further, the distribution sequence number generated when also including distribution of document in the digital watermarking of generation, wherein, distribute sequence
Row number storage corresponds in the database and with sensitive information,
Preferably, distribution sequence number is automatically generated in distribution of document, and distribution sequence number is incrementally generated according to distribution order.
Further, terminal device information, application information, respectively by terminal device and being arranged on terminal device
Application program obtains；
Preferably, terminal device information is terminal device unique mark, and application information is application program unique mark；
It is furthermore preferred that terminal device unique mark is IMEI number or MAC Address etc., application program unique mark is using journey
Program-package name or program signature cryptographic Hash of sequence etc..
Further, user's client information further includes user information, and the user information is obtained after user logs in；
Preferably, user information is user's unique mark；
It is furthermore preferred that user's unique mark is the user name or personal code work in specific application.
Further, acquisition terminal device information, application information and user information with it is each in digital watermarking
When accordingly factor is consistent, user logs in the application program of counterpart terminal equipment and obtains file content.
Further, tracked by obtaining the terminal device information in digital watermarking, application information and user information
The source of file.
A kind of multifactor file watermark using the above method generates extraction system, is given birth to including file distributing device, watermark
Into extraction element, file reception device, wherein, file distributing device obtains user's client information of file reception device, watermark life
Digital watermarking is generated according to user's client information of acquisition into extraction element, file distributing device is inseparable attached by digital watermarking
Add hereof, and be distributed to file reception device, the user in the matching user's client information sum number word watermark of file reception device
Client information obtains file content.
Multifactor file watermark generation extracting method using the present invention, can bring following benefit：
1st, enterprise is used for the distribution of enterprise document by deployment management system.Management system is to using specific mobile terminal
During user's distribution of document of middle specific application, user information, information of mobile terminal, application information and reserved sensitivity are used
The Multiple factors such as information generate digital watermarking；File is realized by user information, information of mobile terminal and application information
Effectively tracking；Whether it is tampered by reserved sensitive information verifying digital watermark, whether tracking result is reliable.Both enterprise is ensured
The efficient distribution of file, while the reliable tracking of enterprise document is realized again.
2nd, according to using user information, information of mobile terminal, three factors of application information generation keys, three because
Element could access to the content of the file of distribution in the case of all meeting, and can ensure the security of file well, simultaneously
These three factors are also readily available, and can acquisition content quickly be decrypted to encryption file.
Description of the drawings
A part of the attached drawing as the application, for providing further understanding of the invention, of the invention is schematic
Embodiment and its explanation do not form inappropriate limitation of the present invention for explaining the present invention.Obviously, the accompanying drawings in the following description
Only some embodiments, to those skilled in the art, without creative efforts, can be with
Other accompanying drawings are obtained according to these attached drawings.In the accompanying drawings：
Fig. 1 is multifactor file watermark generation extracting method block diagram in one embodiment of the invention；
Fig. 2 is multifactor file watermark generation extracting method block diagram in another embodiment of the present invention；
Fig. 3 is the structure diagram of the multifactor file watermark generation extraction system of the present invention.
It should be noted that these attached drawings and word description are not intended to the design model limiting the invention in any way
It encloses, but idea of the invention is illustrated for those skilled in the art by reference to specific embodiment.
Specific embodiment
The specific embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
For make present invention solves the technical problem that, the technical solution that uses and the technique effect that reaches it is clearer, below
The technical solution of the embodiment of the present invention will be described in further detail with reference to attached drawing, it is clear that described embodiment is only
It is part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art exist
All other embodiments obtained under the premise of creative work are not made, belong to the scope of protection of the invention.
Embodiment one
Fig. 1 is that the multifactor file watermark described in the specific embodiment of the invention one generates extracting method block diagram, this implementation
Example is applicable to file distributing device, database, watermark generating means, the file distributing of file reception device management system,
The method of the present invention can manage system to perform by above-mentioned file distributing, as shown in Figure 1, more factors text described in the present embodiment
Part watermark generation extracting method can manage system to perform by above-mentioned file distributing.
S11, obtain user's client information and generate the sensitive information that file is this time distributed；
File management system before distribution of document, to all file receiving device i.e. information of user terminal to be distributed into
Row obtains, and user terminal is the application-specific on particular terminal device, and acquired user's client information is specifically can uniquely really
Determine the mark of particular terminal device and application program.In the present embodiment, file reception device is mobile terminal device, then text
The program-package name or journey of IMEI number or MAC Address of the acquisition mobile terminal device of part management system safety etc. and application program
Sequence signature cryptographic Hash etc..Meanwhile sensitive information is generated at random for this distribution of document, sensitive information prestores in the database.
The digital watermarking of the sensitive information of S12, generation comprising user's client information and file is simultaneously attached in a manner of inseparable
It is added in the file of distribution；
The user's client information that will be obtained in step S11, the i.e. IMEI number of mobile terminal device or MAC Address and using journey
Sequence program-package name or program signature cryptographic Hash, the sensitive information also generated at random, by the use of above-mentioned two parts information as
Input, generates the digital watermarking of this file, and digital watermarking is attached in a manner of inseparable in the file of distribution.Generation
Digital watermarking can be various forms, such as file types such as word, picture, binary code.In the present embodiment, digital watermarking
It is added in a manner of visual hereof, it is so-called visually to refer to that user can see the letter included in watermark when browsing file
Breath, then even if the content of file is to be leaked out by clapping in a manner of, still the information in watermark can be obtained
It takes to be tracked the document source of leakage.
S13, when user terminal opens file, match in user's client information sum number word watermark user's client information for storing to obtain
Take file content；
When user is in file reception device, i.e., after receiving file in the mobile terminal device in the present embodiment, mobile end
Component on end can match the IMEI number of current mobile terminal equipment or the program-package name or program of MAC Address and application program
Cryptographic Hash of signing and the corresponding informance in file digital watermarking, if the corresponding information of two parts is identical, then user can obtain
Get the content of file.
Such benefit is can to specify the specific mobile terminal device to wanting distribution and the priority to each file
The setting of batch is made, even if accidentally mistaking to mobile terminal device, as long as mobile terminal device and preset number
Information matches in watermark, the content of file is still safe, and the leakage of file content will not be caused because file is mistaken.
S14, by comparing the sensitive information of sensitive information in digital watermarking and storage in the database, to judge number
Whether watermark is tampered, and the user's client information obtained from digital watermarking comes trace files source.
And the sensitive information set in digital watermarking is as a safety device, is sentenced by checking whether safety device is intact
The integrality of disconnected file in itself.And when file is revealed, be in the content for ensuring digital watermarking it is reliable, can be with
The IMEI number or MAC Address of mobile terminal device simply in digital watermarking uniquely determine mobile terminal device, tracking text
Part source.
It is pointed out that the mobile terminal device in the present embodiment can be mobile phone, tablet computer, can be with screen and key
Laptop or smartwatch that disk is separated, intelligent glasses etc..And in the IMEI number or MAC Address to mobile terminal device
Acquisition on, acquisition of the open source system such as Android is more efficient and convenient, and for such as IOS close source system then will
Complexity trouble, however technically still can be achieved on.
The embodiment of the present invention is by obtaining two factors of unique mark of mobile terminal device unique mark and application program
It generates digital watermarking, and in file acquisition needs to check the information of two factors, to match, so to add file
Security.It also ensures that the acquisition priority of file is bound with mobile terminal device simultaneously, can easily so limit secret text
The acquiring way of part reduces the risk of file leakage.File distributing manages access rights of the system according to the file set
Automatically different digital watermarkings is set, and is automatically distributed on the mobile terminal device specified, wherein artificial operation is not required,
Realize intelligentized safely and fast file distributing.It, can also be according to the information in digital watermarking even if file is revealed
Fast track document source so as to clearly assert responsibility, finds loophole and is filled up in time.
Embodiment two
The present embodiment is the explanation that embodiment is further optimized on the basis of embodiment one, is implemented to be preferred
Scheme, the present embodiment are the operating system platforms carried using android system by mobile terminal device, have invoked Android
Program in system completes the generation of digital watermarking and extraction.
Fig. 2 is that the step of multifactor file watermark of the present embodiment generates extracting method is schemed, multifactor text as described in Figure 2
Part watermark generation extracting method includes：
S21, terminal device information, application information and user information are obtained, and generates the sensitivity that file is this time distributed
Information；
File distributing management system extraction user's unique mark (user name of such as specific application), terminal device unique mark
(such as IMEI number, MAC Address) and mobile application unique mark (program-package name, the program signature cryptographic Hash of such as mobile application
Deng), the reserved sensitive information that enterprise document is set this time to distribute is distributed after determining the mobile terminal device to be distributed.
The corresponding distribution sequence number of S22, generation this time distribution is simultaneously corresponded with the sensitive information of existence, is stored in data
In storehouse；
File distributing management system carries setting distribution sequence number (automatic incremental), by distribution sequence number and reserved sensitive letter
Breath storage by distributing sequence number is inquired about into database, can uniquely determine reserved sensitive information in the database.
By setting file distributing sequence number, can system management file distributing historical data, while can be to dividing every time
The file of hair is controlled.
S23, existence include terminal device information, application information, user information, sensitive information and distribution sequence number
Digital watermarking is attached in a manner of inseparable in file；
File distributing management system using the user information of Administrator, terminal device information, application information and
Distribute sequence number, reserved sensitive information as input, call reversible algorithm SymFunc, will be output as digital watermarking, with can not
Separated mode attachment is into file f ile.
User's client information in the present embodiment in addition to terminal device information and application information in embodiment one,
User information is further comprised, becomes three factors in two factors of embodiment one, it so can be more careful to file
Accessibility make differentiation.Carry out processing generation digital watermarking to the information of input using reversible algorithm simultaneously, it can be more square
Being extracted afterwards to the information in digital watermarking just.
S24, key is generated using user information, terminal device information and application information, encryption file and corresponding
Encrypted file is issued to specific mobile terminal device by digital watermarking；
File distributing management system is made using the user information of Administrator, mobile facility information and mobile application information
For input, using Salt, hash algorithm is called, obtains encryption key EncKey；Management system encrypts file using EncKey
File and digital watermarking, and output is distributed to mobile terminal device.
The file that Encryption Algorithm is added on the basis of embodiment one to distribution is encrypted, and is to further increase text
The security of part and can not cracking, encrypted algorithm is using conventional technology, and details are not described herein.
S25, terminal device information and application information are extracted, verify and extracts subscriber identity information, utilization is above-mentioned
Key in three information acquisition S24 obtains file content and digital watermarking using key.
Before user reads the document using the mobile application on mobile terminal device, input the user name and password carries out identity
Verification；
The component being integrated in the mobile application is according to subscriber authentication as a result, and extracting mobile terminal device information
And application information, using the Salt built in the component, hash algorithm is called, obtains decruption key DecKey；
The component being integrated in the mobile application decrypts to obtain file f ile and digital watermarking using DecKey, and user can be with
Normal reading file f ile.
Using the scheme described in the present embodiment, the quick, the batch of realization file under Android platform that can be safe divides
Hair, while reliable tracking is realized, it can allow enterprise is quickly differentiated in file distributing to be distributed to confidential document
And management.
Embodiment three
The present embodiment and the difference of embodiment two are, when the file of system discovery leakage, to extract digital watermarking, pass through
Reversible algorithm obtains embedded user information, terminal device information, application information, distribution sequence number and sensitive information.
The sensitive information that is stored is retrieved in the database using series number is distributed, and compares the sensitive letter in digital watermarking
The sensitive information stored in breath and database.If the two is consistent, the reliable results of this tracking.
Specifically, during file distributing management system discovery file f ile leakages, the inseparable of this document attachment is extracted
From digital watermarking, call reversible algorithm SymFunc converted, obtain user information, mobile terminal device information, using journey
Sequence information, distribution sequence number and sensitive information；
Administrator extracts distribution sequence number, and with its searching database, obtains the sensitive information of this distributive reservation, and with
The sensitive information obtained from digital watermarking compares.If the two is consistent, this time tracking reliable results are proved.
Example IV
A kind of multifactor file watermark using the above method as shown in Figure 3 generates extraction system, including file distributing
Device, watermark generation extraction element, file reception device, wherein, file distributing device obtains the user terminal of file reception device
Information, watermark generate extraction element and generate digital watermarking according to user's client information of acquisition, and file distributing device is by digital watermarking
It is inseparable to add hereof, and file reception device is distributed to, file reception device matching user's client information sum number word
User terminal acquisition of information file content in watermark.
The above is only presently preferred embodiments of the present invention, not makees limitation in any form to the present invention, though
So the present invention is disclosed above with preferred embodiment, however is not limited to the present invention, any technology people for being familiar with this patent
Member without departing from the scope of the present invention, when the technology contents using above-mentioned prompting make it is a little change or be modified to
The equivalent embodiment of equivalent variations, as long as being the content without departing from technical solution of the present invention, technical spirit pair according to the invention
Any simple modification, equivalent change and modification that above example is made, in the range of still falling within the present invention program.
Claims (10)
1. a kind of multifactor file watermark generation extracting method, which is characterized in that including：
User's client information is obtained, digital watermarking is generated according to user's client information, digital watermarking is inseparable to be attached to distribution
In file,
When user terminal opens file, matching user's client information and the user terminal acquisition of information file content in digital watermarking, institute
User's client information is stated including at least terminal device information and application information.
2. extracting method is generated according to a kind of multifactor file watermark in claim 1, which is characterized in that in digital watermarking also
The sensitive information generated during comprising distribution of document, wherein judging whether digital watermarking is tampered according to sensitive information.
3. a kind of multifactor file watermark generation extracting method according to claim 1, which is characterized in that further include, according to
Family client information generation key-pair file and digital watermarking are encrypted；
When user terminal opens file, match secret key decryption file described in user terminal information acquisition and obtain file content.
4. a kind of multifactor file watermark generation extracting method in claim 1 or 2, which is characterized in that it further includes, it will
The sensitive information storage generated in distribution of document in the database, is conciliate by comparing the sensitive information of storage in the database
Whether the sensitive information in the digital watermarking that ciphertext part obtains is consistent, judges whether digital watermarking is changed.
5. any multifactor file watermark generation extracting method in Claims 1-4, which is characterized in that generation
Digital watermarking in the distribution sequence number that generates when also including distribution of document, wherein, the storage of distribution sequence number is in the database simultaneously
It is corresponded with sensitive information.
6. any multifactor file watermark generation extracting method in Claims 1-4, which is characterized in that terminal
Facility information, application information are obtained respectively by terminal device with the application program for being arranged on terminal device；
Preferably, terminal device information is terminal device unique mark, and application information is application program unique mark.
7. extracting method is generated according to a kind of multifactor file watermark of right 6, which is characterized in that user's client information further includes use
Family information obtains the user information after user logs in；
Preferably, user information is user's unique mark.
8. extracting method is generated according to any multifactor file watermark in claim 1 to 7, which is characterized in that obtaining
Terminal device information, application information and user information it is consistent to each corresponding factor in digital watermarking when, user logs in
File content is obtained in the application program of counterpart terminal equipment.
9. extracting method is generated according to any multifactor file watermark of claim 1 to 7, which is characterized in that pass through acquisition
The source of terminal device information, application information and user information trace files in digital watermarking.
10. a kind of usage right requires the multifactor file watermark generation extraction system of 1 to 9 any method, including file
Diostribution device, watermark generation extraction element, file reception device, wherein, file distributing device obtains the use of file reception device
Family client information, watermark generate extraction element and generate digital watermarking according to user's client information of acquisition, and file distributing device is by number
Watermark it is inseparable it is additional and be distributed to file reception device hereof, file reception device matching user's client information and
User terminal acquisition of information file content in digital watermarking.
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| CN109492349A (en) * | 2018-10-30 | 2019-03-19 | 连尚（新昌）网络科技有限公司 | A kind of method and apparatus with management document distribution channel for identification |
| US20200228347A1 (en) * | 2019-01-14 | 2020-07-16 | Alibaba Group Holding Limited | Data Security Processing and Data Source Tracing Method, Apparatus, and Device |
| CN111510421A (en) * | 2019-01-31 | 2020-08-07 | 金联汇通信息技术有限公司 | Data processing method and device, electronic equipment and computer readable storage medium |
| CN113177193A (en) * | 2021-04-23 | 2021-07-27 | 深圳依时货拉拉科技有限公司 | Watermark adding method, watermark verifying method and terminal equipment |
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