CN104298688B - The Webpage display process and system of anti-copy - Google Patents
The Webpage display process and system of anti-copy Download PDFInfo
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- CN104298688B CN104298688B CN201310303639.2A CN201310303639A CN104298688B CN 104298688 B CN104298688 B CN 104298688B CN 201310303639 A CN201310303639 A CN 201310303639A CN 104298688 B CN104298688 B CN 104298688B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000008569 process Effects 0.000 title description 8
- 238000005194 fractionation Methods 0.000 claims abstract description 52
- 238000012545 processing Methods 0.000 claims abstract description 8
- 238000007639 printing Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 9
- 230000002688 persistence Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000013515 script Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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]
-
- 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
Abstract
The invention provides the web page contents display methods and device of a kind of anti-copy, this method includes：Obtain the word content for the webpage for needing to issue；Chinese character in the word content and punctuation mark are split, obtain multiple fractionation words of the corresponding Chinese character；The multiple fractionation word is assigned in different content groups, and color matching processing is carried out to the multiple fractionation word, it is formed the Chinese character of black when different content groups is overlapped；Respectively each content group creates a web displaying layer；The display frequency of each display layer is determined according to the display layer number；The display layer is showed according to the frequency.The present invention can effectively realize the protection to webpage word content, prevent on computers direct copying word, prevent computer grab automatically screen, printing.
Description
Technical field
The present invention relates to web technologies field, in particular to the Webpage display process and system of a kind of anti-copy.
Background technology
In order to protect the sensitive information on webpage, it is undesirable to which viewer is directly copied to the data text content, grabbed
Screen protection is deposited or directly printed.Common processing method is to limit user's correlation by browser by JS (Javascript) scripts
Operation.
But this processing method can be cracked now, therefore the viewer of malice can not be prevented directly to the number
Copied according to content of text, grab screen protection and deposit or directly print.
Therefore, a kind of exclusive client browsing mode of the use with digital signature is also provided in the prior art, but this side
Formula installation implementation cost is high, exists and is limited using number of users, the inconvenience such as no normal direction enterprise external client issue.Therefore, need
Want a kind of simple, quick, full automatic company information webpage delivery system, it is possible to achieve webpage word content is only capable of by people's outlook
, do not prevent on computers direct copying word, prevent computer grab automatically screen, printing.
The content of the invention
The embodiment of the present invention provides a kind of Webpage display process and system of anti-copy, can effectively realize to webpage text
The protection of word content, prevent on computers direct copying word, prevent computer grab automatically screen, printing.
Therefore, the embodiment of the present invention provides following technical scheme：
A kind of web page contents display methods of anti-copy, including：
Obtain the word content for the webpage for needing to issue；
Chinese character in the word content is split, obtains multiple fractionation words of the corresponding Chinese character；
The multiple fractionation word is assigned in different content groups, and color matching processing is carried out to the multiple fractionation word,
It is set to form the Chinese character of black when different content groups is overlapped；
Respectively each content group creates a web displaying layer；
The display frequency of each display layer is determined according to the display layer number；
The display layer is showed according to the display frequency, the word in the display layer is torn open using described in preset correspondence
Divide the EOT character libraries of word as display character library.
Preferably, the Chinese character in the word content is split, and obtains multiple fractionations of the corresponding Chinese character
Word includes：
Stroke and/or radical is carried out to the Chinese character in the word content according to encoding of chinese characters to split, corresponded to described in
Multiple fractionation words of Chinese character.
Preferably, the fractionation word includes：Complete Chinese character and incomplete Chinese character.
Preferably, methods described also includes：
Word in the display layer is shown using the preset correspondence picture for splitting word.
Preferably, the display frequency of different display layers is identical or different.
Preferably, the number of content group corresponding to a Chinese character is more than or equal to the fractionation word number that the Chinese character separating goes out.
Preferably, methods described also includes：
If the number of content group corresponding to a Chinese character is more than the fractionation word number that the Chinese character separating goes out, what is had more
In content group to should the blank character position of Chinese character separating word colored interference symbol is set.
A kind of webpage content display system of anti-copy, including：
Acquisition module, for obtaining the word content for the webpage for needing to issue；
Module is split, for being split to the Chinese character in the word content, corresponding the multiple of Chinese character is obtained and tears open
Divide word；
Distribute module, for the multiple fractionation word to be assigned in different content groups, and to the multiple fractionation word
Color matching processing is carried out, it is formed the Chinese character of black when different content groups is overlapped；
Display layer creation module, for being respectively that each content group creates a web displaying layer；
Computing module, for determining the display frequency of each display layer according to the display layer number；
Display module, for showing the display layer according to the display frequency, the word in the display layer uses pre-
The correspondence EOT character libraries for splitting word put are as display character library.
Preferably, the fractionation module, specifically for carrying out pen to the Chinese character in the word content according to encoding of chinese characters
Draw and/or radical is split, obtain multiple fractionation words of the corresponding Chinese character.
Preferably, the word in the display layer is shown using the preset correspondence picture for splitting word.
Preferably, the system also includes：
Interference information add module, torn open for the number in content group corresponding to a Chinese character more than what the Chinese character separating went out
During point word number, in the content group having more to should the blank character position of Chinese character separating word colored interference symbol is set.
The Webpage display process and system of anti-copy provided in an embodiment of the present invention, based on HTML technologies, EOT character library skills
Art, service logic is realized, using Chinese character analytical technology, the word content information of enterprise information publishing webpage is split into automatically more
It is individual to carry out content alternately broadcast by the part of computer automatic splicing, and using human eye vision persistence characteristic, from
And realize that webpage word content is only capable of being identified by the human eye, prevent on computers direct copying word, prevent computer from grabbing automatically
Screen, printing.
Brief description of the drawings
Fig. 1 is a kind of flow chart of the Webpage display process of anti-copy of the embodiment of the present invention；
Fig. 2 is a kind of structural representation of the webpage display system of anti-copy of the embodiment of the present invention；
Fig. 3 is another structural representation of the webpage display system of anti-copy of the embodiment of the present invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, the present invention is described in detail.
In order to make up, Traditional Newspapers enterprise information publishing security is low, word content is easily illegally duplicated, grabs screen printing
Deficiency, the embodiment of the present invention provide one kind and are based on HTML (Hypertext Markup Language, HTML) skill
Art, EOT (Embedded Open Type, embedded open type font format), are realized service logic, are analyzed using based on Chinese character
Technology, by the word content information of enterprise information publishing webpage split into automatically it is multiple can not be by the Chinese of computer automatic splicing
Word radical part, is stored in different vessels respectively, prevents user from carrying out copy stickup directly on screen, or browse
Web page source code carries out the acquisition of word content.
As shown in figure 1, be a kind of flow chart of the Webpage display process of anti-copy of the embodiment of the present invention, including following step
Suddenly：
Step 101, the word content for the webpage for needing to issue is obtained.
Step 102, the Chinese character in the word content is split, obtains multiple fractionation words of the corresponding Chinese character.
Specifically, stroke can be carried out to the Chinese character in the word content according to encoding of chinese characters and/or radical is split, obtained
To should Chinese character multiple fractionation words.Because the fractionation component of not all Chinese character is all legal Chinese character, therefore these are torn open
Word is divided to include complete Chinese character and/or incomplete Chinese character.Such as " " word can be split as " white " and " spoon " word, it is respectively converted into
The coding of related text.For another example, " big " word can be split as random three parts, be respectively stored in the bits of coded of three Chinese characters
On, the codings of three Chinese characters is automatically converted to when split system runs into the word.
If to show a kind of font on webpage, the font file itself have to be present in client terminal, due to
This limitation, various operating systems may be scattered in plus Web user, therefore generally there was only those in the prior art various
The font of environment all generally existings can just be used for webpage.The english font of current various operating system default installations have arial,
The multiple fonts such as verdana, tahoma, and Chinese font only has the Song typeface, black matrix.Therefore also just define that Chinese user can only use
The Song typeface or black matrix go to browse webpage.
, can be with order to which in web displaying, the presentation of endless complete Chinese character can be carried out therefore, in embodiments of the present invention
An EOT character library is pre-created, and the EOT character libraries are downloaded into corresponding client, so that the client can normally be shown
It is corresponding to split word.
EOT is a kind of technology of Microsoft's exploitation, it is allowed to which OpenType fonts are embedded into webpage and can be downloaded to browser
Render, browser according to the definition of font-face in CSS (Cascading Style Sheets, cascading style list), under
Carry, render the font file of this .EOT suffix.These files only in the state of current page activity, are temporarily installed at user's
In system.
In embodiments of the present invention, the foundation of EOT character libraries can be according to encoding of chinese characters to commonly using about 3000 Chinese characters, punctuates
Symbol carries out stroke, radical is split, and the incomplete Chinese character therefrom obtained is indexed in EOT character libraries.
Step 103, the multiple fractionation word is assigned in different content groups, and the multiple fractionation word is matched somebody with somebody
Color processing, makes it form the Chinese character of black when different content groups is overlapped.
It should be noted that the number of content group corresponding to a Chinese character is more than or equal to the fractionation word that the Chinese character separating goes out
Number.For example " big " word is split as three parts, and this three parts is assigned randomly to 6 groups, wherein there is 3 groups not divide
Mix, with full-shape space secondary characters position.The quantity of content group could be arranged to 20~50.
Color matching processing is carried out to multiple fractionation words of fractionation.Such as " " word can be split as " white " and " spoon " word, at random
Red " white " word is distributed in first content group, green " white " word is distributed in the second content group, so will
That black " white " word can be formed when first content group is superimposed with the second content group.For another example, " big " word can press two kinds simultaneously
Mode is split as random three parts, and a kind of three parts of fractionation are red, and a kind of three parts of fractionation are green, six in the future
Divide to be superimposed and could form " big " word of complete black.
It should be noted that multiple fractionation words that each Chinese character separating goes out, the number of the content group of distribution can with identical,
Can be different, as long as ensureing in 1/24 second that human eye can recognize that, these content groups are superimposed shown content out
Complete Chinese character can be combined into.
Step 104, it is respectively that each content group creates a web displaying layer.
Specifically, the DIV element that can use HTML syntax is respectively that each content group creates a web displaying layer,
Word in display layer is used as display character library using above-mentioned EOT character libraries.
Moreover, when being shown to these webpages, it is possible to shown according to color set when being grouped before.
Step 105, the display frequency of each display layer is determined according to the display layer number.
The display frequency characterizes the speed that each display layer shows and disappeared.It should be noted that in practical application
In, fixed display frequency can be used.
Further, in order to prevent from, by measuring the illegal capture caused by the display frequency to web page contents, may be used also
To use revocable display frequency, as long as ensuring that each layer had the enough display time in 1/24 second, so as to can be in human eye
Middle formed retains image.Such as：0~50 millisecond, display；51~120 milliseconds, do not show；121~165 milliseconds, show
Show ....In specific implementation, a database can be established according to actual measurement experiment, is ensuring the unfixed situation of frequency
Under, and can meets that have substantially no effect on display content forms the process for retaining image in human eye.
Step 106, the display layer is showed according to the display frequency.
In actual applications, can according to the relevant information of above-mentioned display layer, generate html web page code, by with webpage
The integration of delivery system, form the displaying of the final page.
It should be noted that in order to further prevent from illegally copying web page contents by snapshots of web pages mode,
In another embodiment of the inventive method, colored interference symbol can also be increased in the blank character position in display content,
Such as ● ★ ◆ ■ ▲.
For example Chinese character separating is 3 fractionation words, and 4 display layers have been used when showing, so the Chinese character can be at it
In the character bit of a display layer be equipped with a blank character position, can increase interference symbol in the position.
In actual applications, the color of symbol is disturbed to could be arranged to yellow, light pink, light blue etc. be not easily formed human eye guarantor
The light colour of picture picture.
, can be in people in display because the displaying of word content is to split words by the difference split by same Chinese character
Formed in eye and retain image, so as to form a complete Chinese character, that is, corresponding Chinese character before splitting.And added interference symbol is then
It will not be formed in human eye and retain image, therefore visual impact will not be produced.And use non-human eye mode such as video recorder, then without
Method effectively eliminates the image that interference meets.Therefore, folded when the enough snapshots of web pages of external software continuous capturing and automatically
When adding processing, superposition dark black patch can be synthesized automatically, the synthesis Chinese character for ultimately resulting in the character position is covered firmly.
It can be seen that the web page contents display methods of anti-copy provided in an embodiment of the present invention, the webpage word that needs are issued
Chinese character in content is split, and the content of fractionation can be browsed using preset EOT character libraries on client browser, together
When, the content of fractionation can replace flicker displaying in the form of multiple webpage DIV layers, so as to ensure each layer in 1/24 second at least
It is played out once, to realize that webpage word content is only capable of being identified by the human eye using human eye vision persistence characteristic, but can not be simple
Singly grab screen operation or grab screen software and intercepted.
Further, in order to prevent user from grabbing the screen more secondary screens of software intercepts using continuous, by simple overlapping realization
Hold and obtain, system color addition can be carried out to partial resolution content and black patch disturbs.So as to effectively prevent company information
Issue when browsed user on computers direct copying word, prevent computer grab automatically screen, print.
In addition, in order that the client browser of above-mentioned EOT character libraries is not supported to can browse through above-mentioned web page contents yet, at this
In another embodiment of inventive method, also each fractionation word further can be converted into picture file (such as GIF pictures), and deposit
Store up the color for configuration.Correspondingly, when creating web displaying layer for each content group, it is necessary to which output character is split into word
Coding be changed to the path of picture file corresponding to output character, and transferred picture text is confirmed according to its corresponding color
Part.
Correspondingly, in order to further prevent from illegally copying web page contents by snapshots of web pages mode, can also incite somebody to action
It is preset interference picture to export blank character random replacement.
It should be noted that in actual applications, above two web displaying mode can be provided to client simultaneously, and
Judge whether client browser supports the EOT character libraries between above-mentioned steps 103 and step 104.If support, in step
Presentation layer is created by EOT modes in rapid 104, i.e., the word in display layer uses preset EOT character libraries as display character library；If
Do not support, then create display layer by pictorial manner at step 104, i.e., the word in display layer is shown using preset picture
Show.
Correspondingly, the embodiment of the present invention additionally provides a kind of webpage content display system of anti-copy, as shown in Fig. 2 being
A kind of structural representation of the system.
In this embodiment, the system includes：
Acquisition module 201, for obtaining the word content for the webpage for needing to issue；
Module 202 is split, for being split to the Chinese character in the word content, obtains the multiple of the corresponding Chinese character
Split word；
Distribute module 203, for the multiple fractionation word to be assigned in different content groups, and to the multiple fractionation
Word carries out color matching processing, it is formed the Chinese character of black when different content groups is overlapped；
Display layer creation module 204, for being respectively that each content group creates a web displaying layer；
Computing module 205, for determining the display frequency of each display layer according to the display layer number；
Display module 206, for showing the display layer according to the display frequency.
Above-mentioned fractionation module 202 specifically can according to encoding of chinese characters in the word content Chinese character carry out stroke and/
Or radical is split, multiple fractionation words of the corresponding Chinese character are obtained.
It should be noted that in embodiments of the present invention, the word in the display layer can use preset corresponding institute
The EOT character libraries for splitting word are stated as display character library；Or shown using the preset correspondence picture for splitting word.Specifically
According to client browser ETO character libraries whether can be supported to determine.
In addition, above-mentioned display frequency characterizes the speed that each display layer shows and disappeared.It should be noted that in reality
In, fixed display frequency can be used, revocable display frequency can also be used.
It can be seen that the webpage content display system of anti-copy provided in an embodiment of the present invention, the webpage word that needs are issued
Chinese character in content is split, and the content of fractionation can be browsed using preset EOT character libraries on client browser, together
When, the content of fractionation can replace flicker displaying in the form of multiple webpage DIV layers, so as to ensure each layer in 1/24 second at least
It is played out once, to realize that webpage word content is only capable of being identified by the human eye using human eye vision persistence characteristic, but can not be simple
Singly grab screen operation or grab screen software and intercepted.
Further, in order to prevent user from grabbing the screen more secondary screens of software intercepts using continuous, by simple overlapping realization
Hold and obtain, system color addition can be carried out to partial resolution content and black patch disturbs.So as to effectively prevent company information
Issue when browsed user on computers direct copying word, prevent computer grab automatically screen, print.
As shown in figure 3, it is another structural representation of the webpage content display system of anti-copy of the embodiment of the present invention.
Unlike shown in Fig. 2, in this embodiment, the system further comprises：
Interference information add module 301, go out for the number in content group corresponding to a Chinese character more than the Chinese character separating
Fractionation word number when, in the content group having more to should the blank character position of Chinese character separating word colored interference symbol is set
Number.
As can be seen from the above description, the webpage display system of anti-copy provided in an embodiment of the present invention, is based on
HTML technologies, EOT word-base technologies, realize service logic, using Chinese character analytical technology, by the word of enterprise information publishing webpage
Hold information to split into multiple by the part of computer automatic splicing, and using human eye vision persistence characteristic not entering automatically
Row content alternately broadcast, so as to realize that webpage word content is only capable of being identified by the human eye, prevent on computers direct copying word,
Prevent computer from grabbing screen, printing automatically.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Divide mutually referring to what each embodiment stressed is the difference with other embodiment.It is real especially for system
For applying example, because it is substantially similar to embodiment of the method, so describing fairly simple, related part is referring to embodiment of the method
Part explanation.
Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general
Computing device realize that they can be concentrated on single computing device, or be distributed in multiple computing devices and formed
Network on, such as, display module 206 is arranged on client, and other modules are arranged on server end.Alternatively, they can
To be realized with the executable program code of computing device, it is thus possible to be stored in storage device by computing device
To perform, they are either fabricated to each integrated circuit modules respectively or makes the multiple modules or step in them
Realized into single integrated circuit module.So, the present invention is not restricted to any specific hardware and software combination.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (11)
- A kind of 1. web page contents display methods of anti-copy, it is characterised in that including：Obtain the word content for the webpage for needing to issue；Chinese character in the word content is split, obtains multiple fractionation words of the corresponding Chinese character；The multiple fractionation word is assigned in different content groups, and color matching processing is carried out to the multiple fractionation word, makes it The Chinese character of black is formed when different content groups is overlapped；Respectively each content group creates a web displaying layer；The display frequency of each display layer is determined according to the display layer number；The display layer is showed according to the display frequency, the word in the display layer uses the preset correspondence fractionation word EOT character libraries as show character library.
- 2. according to the method for claim 1, it is characterised in that the Chinese character in the word content is split, Obtaining multiple fractionation words of the corresponding Chinese character includes：Stroke is carried out to the Chinese character in the word content according to encoding of chinese characters and/or radical is split, obtains the corresponding Chinese character Multiple fractionation words.
- 3. according to the method for claim 1, it is characterised in that the fractionation word includes：Complete Chinese character and incomplete Chinese character.
- 4. according to the method for claim 1, it is characterised in that methods described also includes：Word in the display layer is shown using the preset correspondence picture for splitting word.
- 5. according to the method for claim 1, it is characterised in that the display frequency of different display layers is identical or different.
- 6. according to the method described in any one of claim 1 to 5, it is characterised in that the number of content group corresponding to a Chinese character The fractionation word number gone out more than or equal to the Chinese character separating.
- 7. according to the method for claim 6, it is characterised in that methods described also includes：If the number of content group corresponding to a Chinese character is more than the fractionation word number that the Chinese character separating goes out, in the content having more In group to should the blank character position of Chinese character separating word colored interference symbol is set.
- A kind of 8. webpage content display system of anti-copy, it is characterised in that including：Acquisition module, for obtaining the word content for the webpage for needing to issue；Module is split, for being split to the Chinese character in the word content, obtains multiple fractionation words of the corresponding Chinese character；Distribute module, for the multiple fractionation word to be assigned in different content groups, and the multiple fractionation word is carried out Color matching is handled, and it is formed the Chinese character of black when different content groups is overlapped；Display layer creation module, for being respectively that each content group creates a web displaying layer；Computing module, for determining the display frequency of each display layer according to the display layer number；Display module, for showing the display layer according to the display frequency, the word in the display layer uses preset The corresponding EOT character libraries for splitting word are as display character library.
- 9. system according to claim 8, it is characterised in that:The fractionation module, specifically for carrying out stroke and/or radical to the Chinese character in the word content according to encoding of chinese characters Split, obtain multiple fractionation words of the corresponding Chinese character.
- 10. system according to claim 8, it is characterised in that:Word in the display layer is shown using the preset correspondence picture for splitting word.
- 11. according to the system described in any one of claim 8 to 10, it is characterised in that the system also includes：Interference information add module, it is more than the fractionation word that goes out of the Chinese character separating for the number in content group corresponding to a Chinese character During number, in the content group having more to should the blank character position of Chinese character separating word colored interference symbol is set.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310303639.2A CN104298688B (en) | 2013-07-18 | 2013-07-18 | The Webpage display process and system of anti-copy |
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| CN107220291B (en) * | 2017-04-25 | 2020-12-25 | 深圳中兴网信科技有限公司 | Webpage data anti-capture method and system |
| CN107609053A (en) * | 2017-08-23 | 2018-01-19 | 北京奇虎科技有限公司 | A kind of web page display method and apparatus |
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|---|---|---|---|---|
| US5949885A (en) * | 1996-03-12 | 1999-09-07 | Leighton; F. Thomson | Method for protecting content using watermarking |
| CN1300971A (en) * | 2000-11-20 | 2001-06-27 | 王辉 | Page contents protection method for Internet |
| US6922693B1 (en) * | 1998-06-14 | 2005-07-26 | Finjan Software, Ltd. | Method and system for copy protection of images displayed on a computer monitor |
| CN102542188A (en) * | 2010-12-31 | 2012-07-04 | 北京安码科技有限公司 | Method and device for preventing screen contents of webpage from being copied |
| CN102567660A (en) * | 2010-12-31 | 2012-07-11 | 北京安码科技有限公司 | Method and device for preventing webpage character content from copy |
-
2013
- 2013-07-18 CN CN201310303639.2A patent/CN104298688B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5949885A (en) * | 1996-03-12 | 1999-09-07 | Leighton; F. Thomson | Method for protecting content using watermarking |
| US6922693B1 (en) * | 1998-06-14 | 2005-07-26 | Finjan Software, Ltd. | Method and system for copy protection of images displayed on a computer monitor |
| CN1300971A (en) * | 2000-11-20 | 2001-06-27 | 王辉 | Page contents protection method for Internet |
| CN102542188A (en) * | 2010-12-31 | 2012-07-04 | 北京安码科技有限公司 | Method and device for preventing screen contents of webpage from being copied |
| CN102567660A (en) * | 2010-12-31 | 2012-07-11 | 北京安码科技有限公司 | Method and device for preventing webpage character content from copy |
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| CN104298688A (en) | 2015-01-21 |
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