CN110288504A - It is a kind of to automatically add water impression method towards block chain digital education platform - Google Patents
It is a kind of to automatically add water impression method towards block chain digital education platform Download PDFInfo
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- CN110288504A CN110288504A CN201910542460.XA CN201910542460A CN110288504A CN 110288504 A CN110288504 A CN 110288504A CN 201910542460 A CN201910542460 A CN 201910542460A CN 110288504 A CN110288504 A CN 110288504A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 238000004422 calculation algorithm Methods 0.000 claims abstract description 32
- 230000004048 modification Effects 0.000 claims description 6
- 238000012986 modification Methods 0.000 claims description 6
- 230000002441 reversible effect Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000013515 script Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012795 verification Methods 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
- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
- G06F21/105—Arrangements for software license management or administration, e.g. for managing licenses at corporate level
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/835—Generation of protective data, e.g. certificates
- H04N21/8358—Generation of protective data, e.g. certificates involving watermark
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2201/00—General purpose image data processing
- G06T2201/005—Image watermarking
- G06T2201/0203—Image watermarking whereby the image with embedded watermark is reverted to the original condition before embedding, e.g. lossless, distortion-free or invertible watermarking
Abstract
Impression method is automatically added water towards block chain digital education platform the invention discloses a kind of, comprising: (1) block chain digital education platform call number watermark service system, for any resource request watermark service in Numerical Resources Database；(2) watermaking system receives the type of the automatic identification resource after digital resource；(3) different watermarking algorithm libraries is called according to the type of digital resource and adds watermark information；(4) resource for having added digital watermarking is returned into block chain digital education service platform.Based on this, the present invention is the watermark interface for variety carrier, and user only needs to call the service of watermaking system, and watermark service system relies on block platform chain, associated rights information is all recorded on block chain, provides guarantee for the public credibility of digital watermarking.
Description
Technical field
The present invention relates to the digital resource copyright protection field in block chain digital education platform, more particularly to it is a kind of towards
Block chain digital education platform automatically adds water impression method and system.
Background technique
It the creation of digital resource and propagates increasingly frequent in digital education today that Internet technology becomes increasingly popular.Due to
The propagated feature strong, audient is wide of digital resource, dispute over copyright problem have been increasingly becoming the focus of public concern.Number
The commonplace reason of resource invasion phenomenon mainly has: digital resource can be downloaded from many websites, this is digital resource
Piracy create convenience；Pirate resource propagates that cost is relatively low, this produces centainly the supervision of copyright on network
Difficulty.For these reasons, when abuse occurs, often it is difficult rapidly and accurately to lock infringer, and carry out correlation
Work of calling to account, that is, track and determine resource leakage source.
With the rise of bit coin, Floor layer Technology block chain has gradually entered into the visual field of people.The essence of block chain is
The distributed account book database of one decentralization, based on cryptological technique building point to point network distributed system it
On, and by common recognition made it is a kind of can not be distorted with data, the technology for the characteristics such as information is open and clear.Therefore, block chain
It really weighs in digital resource, can play an important role in terms of digital copyright protection.
Digital watermarking is frequently utilized for the copyright protection of digital resource.Digital watermark technology is by some copyright information
(i.e. digital watermarking) is directly embedded into a kind of technology of digital resource.Compared with conventional watermark, feature is high safety, concealment
Height, robustness are good, do not influence the use value of original vector, are also not easy to be ascertained and modify again.The characteristics of digital watermarking, determines
It is easily applied under the scene of digital resource protection, records relevant benefits information by digital resource, can achieve
The purpose that copyright protection, infringement are called to account.
The algorithm of digital watermarking is many kinds of, but core strategy only one: watermark information is not easy as far as possible
It is noticeable, not easily modified hides into bearer documents.Digital watermarking algorithm is often classified according to carrier type, most common
Be watermarking algorithm for picture and text.
For picture watermarking algorithm, spatial domain watermark algorithm and frequency domain water mark algorithm can be divided into.In spatial domain watermark algorithm
Most commonly least significant bit (LSB) algorithm, visual impact very little of the variation of the lowest order of pixel value to human eye, secret letter
Breath is just hidden in the lowest order or secondary low level of each pixel of image, realizes its invisibility.Another kind of watermarking algorithm is frequency domain
Watermarking algorithm, into picture add watermark information before need to make original image reversible pretreatment.By the ash of picture
Degree is strong and weak, is considered as the frequency domain of picture.It will by certain shift means (Fourier transformation, discrete cosine transform, wavelet transformation etc.)
Image transforms to frequency domain (wavelet field), adds watermark to image in frequency domain, then by inverse transformation, convert the image into spatial domain.
Relative to airspace means, frequency domain means are invisible stronger, and attack tolerant is higher.
Another kind of common digital watermarking is the watermarking algorithm for text.Different from picture watermarking algorithm, text does not have
The redundant space for having picture so big, visually for the very limited of adjustment, common algorithm be modify text line space,
Word space hides watermark information by the minor change for being not easy to be noticeable.Besides by the modification to punctuation mark, with funny
For number, space can be added to respectively indicate two binary digits by full-shape comma and half-angle comma respectively.In addition, there are also a kind of
It is based on naturally semantic watermarking algorithm, the characteristics of this watermarking algorithm is in the case where not changing text original meaning to original text
It modifies.
The resource that block chain technology provides high public credibility really weighs voucher, is able to demonstrate that the ownership of digital resource copyright.
However, the abuse in internet environment is often difficult to call to account, pirate behavior is propagated the reason is that being technically difficult to determine
People.Introducing digital watermark technology can solve this problem, and when resource is provided, into resource, addition obtains the Association Identity of taker
The target that infringement is called to account may be implemented in conjunction with the public letter feature of block chain in information.However, in digital education platform at present also
Lack the digital watermarking solution of whole set of system, each copyright protecting system requires a set of high automation, high type covers,
The customized watermaking system of watermark information.
Summary of the invention
In view of above-mentioned, the invention proposes a set of digital watermarking algorithm library for variety carrier and a kind of it is applied to block
The digital watermarking system of chain digital resource property right protection.Since the watermaking system can support different types of resource carrier, from
And can adapt to plurality of application scenes, it can play a significant role in the relevant information system of copyright protection.
It is a kind of to automatically add water impression method towards block chain digital education platform, comprising steps of
(1) block chain digital education platform call number watermark service system, for any resource in Numerical Resources Database
Watermark service is requested, specific as follows:
The 1.1 digital education service platforms based on block chain set up digital watermarking service system, and resource copyright is related
Information (including copyright ownership people, right to use buyer, distribution timestamp etc.) is converted into digital watermarking；
1.2 are directed to the digital watermarking service system, and the watermark interface of variety carrier is arranged, calls watermark to take for user
Business；
1.3 users are by block chain digital education platform call number watermark service system, for required digital resource,
Request digital watermarking service.
The watermark service system can convert number for information such as copyright ownership people, right to use buyer, distribution timestamps
Word watermark is simultaneously embedded in digital resource carrier.Conventional digital digital watermark often only turns some marks for representing copyright owner's identity
It is melted into digital watermarking, the information being capable of providing is than relatively limited.This method can be by the timestamp being closely related with process of exchange, purchase
The information such as buyer are embedded in together, can be improved accuracy when resource infringement tracking is traced to the source.
(2) watermaking system receives the type of the automatic identification resource after digital resource, specific as follows:
2.1 according to call instruction upload digital resource file to watermaking system, while parsing the file of upload digital resource
Head condition code；
After 2.2 watermaking systems receive digital resource file, this article is judged according to the file header condition code of the digital resource
The type of part.
Digital watermark technology is although long-standing, but all lacks a whole set of solution for being directed to different type carrier all the time
Certainly scheme.
Further, the digital resource of watermark to be embedded is divided into picture resource, textual resources (PDF), video resource three
Class, every one kind digital resource possess its respective file header condition code, this watermark service system can be for different carriers
File physical structure feature is embedded in digital watermarking using different methods.
(3) different watermarking algorithm libraries is called according to the type of digital resource and adds watermark information, specific as follows:
3.1 setting block chain digital watermarking algorithm libraries, including the algorithmic function for adding watermark；
3.2, according to digital resource type identified in step (2), call the block chain digital watermarking algorithm library,
In, for picture watermark, the digital watermarking algorithm of LSB is combined using Arnold displacement；For Text Watermarking, modification PDF is taken
The method of file physical structure hides digital watermarking；For video watermark, take a kind of combining encryption HEVC video can be against the current
India side case.
Further, the relevant information of digital watermarking is indicated using the SHA-256 abstract of watermark information, realized unitized
Identification information.
(4) resource for having added digital watermarking is returned into block chain digital education service platform.The watermark service system is answered
Used in the resource infringement tracking scene for combining block chain, relevant friendship is recorded using the decentralization of block chain, anti-tamper feature
Easy information, it is ensured that digital watermarking to be verified be it is authentic and valid, with public credibility.Traditional digital watermarking is asked in the presence of trust
Topic not can guarantee the correctness of digital watermarking record, borrow block chain technology, and watermark can be made to have public credibility.
Based on the above-mentioned technical proposal, advantageous effects of the invention are as follows:
(1) existing digital watermark technology is more scattered, not the watermarking tool for variety carrier of set of system.Add
Need to spend the basic principle and specific practice of certain time research watermark when watermarking.Present system provides for variety carrier
Watermark interface, user only need to call the service of watermaking system, help to improve production efficiency；
(2) existing digital watermarking does not have to provide the guarantee of public credibility in dispute over copyright, this watermark service system is relied on
In block platform chain, associated rights information is all recorded on block chain, provides guarantee for the public credibility of digital watermarking.Number
The information that block on block chain is carried in watermark can be traced to the source by block chain and be looked for when abuse needs to call to account
To relevant copyright trading information, to prove that digital watermarking is not to forge, abuse occurs really；
(3) this system has supermatic feature, and after uploading resource file, system can automatically identify file
Type simultaneously chooses corresponding water mark method automatically.In addition, system also provides the conversion regime of watermark information, no matter watermark information
Content what is, this watermaking system can be translated into the information for being suitble to insertion bearer resource, eliminate service call
The pretreated step of person's watermark information.
Detailed description of the invention
Fig. 1 is block chain digital watermarking service system frame of the present invention；
Fig. 2 is picture water mark method implementation process of the present invention；
Fig. 3 is video watermark implementation method process of the present invention；
Fig. 4 is video watermark information extraction implementation method of the present invention.
Specific embodiment
In order to more specifically describe the present invention, with reference to the accompanying drawing and specific embodiment is to technical solution of the present invention
It is described in detail.
As shown in Figure 1, block chain digital education service platform call number watermark service system, in Numerical Resources Database
Various resource request watermark services.Watermaking system receives the type for capableing of the automatic identification resource after digital resource, according to money
The type in source calls different watermarking algorithm libraries and adds watermark information, then returns to the resource file for having added digital watermarking
Give caller (i.e. block chain digital education service platform).
Watermaking system can automatic identification digital resource file, while the attack of malice can be prevented.If without text
Part type checking, attacker probably upload some malicious attack scripts, then execute again, achieve the purpose that hidden.
This system is taken through file content to judge the type of file, can be judged according to the feature of some bytes of beginning of file
The type of this file entirely asks file without reading, so feasibility is also relatively high.In order to enable the system to enough uses
Wide application scenarios, system support the file header condition code of multiple types file, are just parsed when resource file uploads.
It is as follows in the specific embodiment of addition digital watermarking:
(1) all digital watermarkings take watermark information SHA-256 make a summary to indicate relevant information, this be in order to
Unitized identification information, aspect carry out the storage and verification of relevant watermark data, and raw information should be recorded in block chain
Or in the system of other high public credibility, when verifying watermark in resource every time, by the watermark information extracted and original letter
The summary info that breath generates is compared；
(2) it is directed to picture watermark, the digital watermarking algorithm of LSB is combined using Arnold displacement.LSB algorithm is a kind of airspace
Digital watermarking algorithm, be widely used since its algorithm is simple and easy to implement, LSB adapts to picture water in this system
The requirement of print.However, traditional LSB watermarking algorithm has poor robustness, it is subject to local shearing attack.Cause
This, this system combines Arnold and replaces this converter technique, has effectively upset position distribution of the digital watermarking in picture, no
It is subject to local attack, improves whole robustness.Specific implementation is as shown in Figure 2；
(3) it is directed to text (PDF) watermark, this watermaking system takes the method for modification pdf document physical structure to hide
Digital watermarking.Different from picture, PDF watermark is realized by modifying the physical structure of pdf document, PDF document according to
The PDF specification of Adobe is parsed, and the partial content in file is only used in parsing, and modifying this partial content will not
The visual effect for causing PDF can achieve the purpose of hiding information.There is " cross reference table " this structure in pdf document,
Basic format is " XXXXXXXXXXPXXXXXPX ".For realizing the random access of object in PDF document.In normal PDF text
In part, in cross reference table structure " P " is one " ", and the character of the position is not resolved when pdf document parses, and it can
To be used to hide the information of digital watermarking；
(4) it is directed to video watermark, this watermaking system takes a kind of combining encryption HEVC video reversible water mark scheme.According to
The encoding characteristics of HEVC carry out selective encryption during Video coding, the key stream generated by RC4 stream cipher system
Come the symbol of encrypted motion vector difference and the symbol of residual error coefficient, then carries out the insertion of reversible water mark that can not be perceived.Such as
Shown in Fig. 3, the processing of RC4 stream cipher encrypting is carried out to improve water using the key different from video-encryption to watermark information before insertion
The safety of official seal breath, then watermark information is embedded in the ac coefficient of residual information.In decoding video, decryption video and
It extracts between watermark without specific sequence, can first carry out the decryption of video or first carry out the extraction of watermark, realize process
As shown in Figure 4.
The above-mentioned description to embodiment is for that can understand and apply the invention convenient for those skilled in the art.
Person skilled in the art obviously easily can make various modifications to above-described embodiment, and described herein general
Principle is applied in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, ability
Field technique personnel announcement according to the present invention, the improvement made for the present invention and modification all should be in protection scope of the present invention
Within.
Claims (6)
1. a kind of automatically add water impression method towards block chain digital education platform characterized by comprising
(1) block chain digital education platform call number watermark service system, for any resource request in Numerical Resources Database
Watermark service；
(2) watermaking system receives the type of the automatic identification resource after digital resource；
(3) different watermarking algorithm libraries is called according to the type of digital resource and adds watermark information；
(4) resource for having added digital watermarking is returned into block chain digital education service platform.
2. according to claim 1 automatically add water impression method towards block chain digital education platform, which is characterized in that institute
It is specific as follows to state step (1):
1.1 digital education service platforms based on block chain set up digital watermarking service systems, and by resource copyright relevant information
It is converted into digital watermarking；
1.2 are directed to the digital watermarking service system, and the watermark interface of variety carrier is arranged, calls watermark service for user；
1.3 users are by block chain digital education platform call number watermark service system, for required digital resource, request
Digital watermarking service.
3. according to claim 1 automatically add water impression method towards block chain digital education platform, which is characterized in that institute
It is specific as follows to state step (2):
2.1 according to call instruction upload digital resource file to watermaking system, while the file header for parsing upload digital resource is special
Levy code；
After 2.2 watermaking systems receive digital resource file, this document is judged according to the file header condition code of the digital resource
Type.
4. according to claim 3 automatically add water impression method towards block chain digital education platform, which is characterized in that institute
State step 2 further include: the digital resource of watermark to be embedded is divided into picture resource, textual resources (PDF), video resource three classes,
Every one kind digital resource possesses its respective file header condition code.
5. according to claim 1 automatically add water impression method towards block chain digital education platform, which is characterized in that institute
Step (3) is stated to call different watermarking algorithm libraries according to the type of digital resource and add watermark information, specific as follows:
3.1 setting block chain digital watermarking algorithm libraries, including the algorithmic function for adding watermark；
3.2, according to digital resource type identified in step (2), call the block chain digital watermarking algorithm library, wherein needle
To picture watermark, the digital watermarking algorithm of LSB is combined using Arnold displacement；For Text Watermarking, modification pdf document object is taken
The method of structure is managed to hide digital watermarking；For video watermark, a kind of combining encryption HEVC video reversible water mark scheme is taken.
6. according to claim 5 automatically add water impression method towards block chain digital education platform, which is characterized in that also
Including indicating the relevant information of digital watermarking using the SHA-256 abstract of watermark information, realizing unitized identification information.
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| CN110929232A (en) * | 2019-10-30 | 2020-03-27 | 西安西电链融科技有限公司 | System and method for protecting picture privacy information based on block chain and mobile device |
| CN111090837A (en) * | 2019-12-06 | 2020-05-01 | 上海科乐宜信息科技有限公司 | Intelligent tracking method based on block chain technology |
| CN113360860A (en) * | 2021-08-09 | 2021-09-07 | 江苏羽驰区块链科技研究院有限公司 | Screen divulgence protection method based on block chain |
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| CN113486309A (en) * | 2021-07-20 | 2021-10-08 | 阳光电源股份有限公司 | Technical document processing method, digital watermark server and processing system |
| CN113360860A (en) * | 2021-08-09 | 2021-09-07 | 江苏羽驰区块链科技研究院有限公司 | Screen divulgence protection method based on block chain |
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