CN102479297B - Copyright protection method based on public key system and digital watermarking - Google Patents
Copyright protection method based on public key system and digital watermarking Download PDFInfo
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- CN102479297B CN102479297B CN201010562874.8A CN201010562874A CN102479297B CN 102479297 B CN102479297 B CN 102479297B CN 201010562874 A CN201010562874 A CN 201010562874A CN 102479297 B CN102479297 B CN 102479297B
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Abstract
The invention provides a copyright protection method based on a public key system and a digital watermarking. The method comprises the following steps of: utilizing a privet key to sign a digital work W of an author A to obtain a singed digital work Ss_A(W); utilizing a public key to successfully authenticate the Ss_A(W) by an RAC (Remote Access Controller); carrying out Hash calculation on the W to obtain an H(W); sending an Ss_RAC (H(W)) composed of the Ss_A(W), the H(W) and a time stamp T to a copyright management center RMC by the RAC; obtaining the W from the author A by the RMC and carrying out the Hash calculation on the W to obtain the H(W); after the authentication of the Ss_RAC (H(W)) is successful, sending a successful message to the RAC by the RMC; utilizing the identity of the digital work IDW, the identity of the author IDA, the identity of RAC IDRAC and the time stamp T to form watermarking information M by the RAC; embedding the M into the W to obtain a digital watermarking work MW; and protecting the copyright according to the MW. through the implementation of the embodiment of the invention, the digital copyright can be effectively protected.
Description
Technical field
The present invention relates to copyright protection technology field, more specifically, relate to a kind of copy-right protection method based on public key cryptosyst and digital watermarking.
Background technology
Developing rapidly of computer technology and popularizing of communication network, the data transmission of digital product is day by day frequent, and the copyright protection of corresponding digital product receives unprecedented threat.In order to protect the intellecture property of digital product and its possessory economic interests, generally adopt the multiple method establishment digital copyright protecting such as digital watermarking, password system.Cryptography comprises public key cryptosyst etc., and it lays particular emphasis on access control to digital product and secret communication, but seems unable to do what one wishes to the copyright authentication of digital product and piracy tracking problem.Digital watermark in the True-false distinguish of digital product and the piracy control of validated user with or without analogous advantage, but the uncontrollable access control to digital product and secret communication.How cryptography is combined with digital watermark the copyright protecting digital product, solution also not relevant at present.
Summary of the invention
The embodiment of the present invention proposes a kind of copy-right protection method based on public key cryptosyst and digital watermarking, effectively can protect digital publishing rights.
The technical scheme of the embodiment of the present invention is as follows:
Based on a copy-right protection method for public key cryptosyst and digital watermarking, the method comprises:
Copyright Ss_A (W) after obtaining after utilizing private key to sign to the copyright W of author A signing, is committed to copyright authentication center RAC by Ss_A (W);
RAC utilizes public key verifications Ss_A (W) success, carry out Hash operation to W and obtain H (W), the Ss_RAC be made up of Ss_A (W), H (W) and time stamp T (H (W)) is sent to copyright management center RMC by RAC;
RMC obtains W by author A, carries out Hash operation obtain H (W) to W, and after verifying Ss_RAC (H (W)) success according to H (W), RMC sends success message to RAC;
The mark IDRAC that RAC utilizes copyright code name IDW, author identifies IDA, RAC and time stamp T structure watermark information M, embeds W and obtains watermark digit works MW by M;
Copyright is protected according to MW.
Described according to MW protect copyright comprise, user B notify RMC change MW, RMC obtain new watermark digit works MWB according to the mark IDB of user B and MW, MWB is sent to described user B.
Described RMC identifies IDB and MW according to user and obtains new watermark digit works MWB and comprise, and RMC is formed and retrieval transaction chain AB, and utilizes Hash operation to obtain unique identification H (AB); H (AB), IDB and MW are sent to RAC; After RAC examines IDB and MW, utilize H (AB), IDB and MW to construct watermark information MWB, and MWB is sent to RMC.
Described MWB is sent to described user B after comprise further, RMC increases and upgrades the record of MW.
The mark IDA of described author A, the mark IDRAC of described RAC, the mark IDB of described user B and the code name IDW of described copyright all obtain from certificate verification center CA.
Described method comprises further, and send the ID IDA of IDW, time stamp T 0 and author A to RAC, RAC verifies IDW, T0 and IDA.
Described RAC verifies that IDW, T0 and IDA comprise, and RAC retrieves IDW in a database, then obtains MW according to IDW from RMC, if the MW that MW and RMC retrieves from database is identical, then IDW, T0 and IDA are by checking; Otherwise extract the watermark information of MW, judge whether the IDA in described watermark information equals IDA, and whether the T in described watermark information equals T0, if the IDA of described watermark information equals IDA, and T equals T0, then IDW, T0 and IDA are by checking, otherwise IDW, T0 and IDA be not by checking.
Described according to MW protect copyright comprise, IDA, IDB, T2 and MW are sent to RMC, in the database of self, whether retrieve MW according to RMC and then directly judge whether author B is validated user; After RMC sends MW, IDA and T2 to RAC, RAC judges that whether author A is the owner of MW; When author B is not validated user, and A is the owner of MW, then judge that B encroaches right.
Describedly in the database of self, whether retrieve MW according to RMC and then directly judge whether author B is that validated user comprises, and RMC checks the term of validity of MW from database, if do not arrive the term of validity, author B is validated user; Otherwise there is B if retrieve in the chain transaction of MW, author B is validated user, if do not retrieve in the chain transaction of MW, author B is not validated user.
Described RAC judges whether author B encroaches right and comprises, and RAC retrieves MW in a database, if the owner retrieving MW is A, then determines that A is the owner of MW; Otherwise, from MW, extracts watermark information, in watermark information, comprise IDA, and T2 equals T, then determine that A is the owner of MW, otherwise determine that A is not the owner of MW.
As can be seen from technique scheme, in embodiments of the present invention, the copyright W signature of private key to author A is utilized to obtain Ss_A (W), W after RAC certifying signature, carry out Hash operation to W and obtain H (W), the Ss_RAC (H (W)) be made up of Ss_A (W), H (W) and time stamp T is sent to copyright management center RMC; RMC obtains W by author A, carries out Hash operation obtain H (W) to W, and after verifying Ss_RAC (H (W)) success according to H (W), RMC sends success message to RAC; The mark IDRAC that RAC utilizes copyright code name IDW, author identifies IDA, RAC and time stamp T structure watermark information M, embeds W and obtains watermark digit works MW, protect copyright according to MW by M.By in the information insertion copyrights such as author's mark and timestamp, when user uses the watermark digit works with self information, just can normally use with watermark digit works.Therefore, effectively digital publishing rights can be protected.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the copy-right protection method that the present invention is based on public key cryptosyst and digital watermarking.
Embodiment
Express clearly clear for making the object, technical solutions and advantages of the present invention, below in conjunction with drawings and the specific embodiments, the present invention is further described in more detail.
In embodiments of the present invention; public key cryptosyst is utilized to achieve information security transmission between author A and RAC, RMC; identified by author and timestamp etc. forms watermark information, and user uses the copyright with watermark information, effectively can protect the copyright of copyright.
See the schematic flow sheet that accompanying drawing 1 is the copy-right protection method based on public key cryptosyst and digital watermarking, step 101-104 is the process that author A registers W; Step 105-108 is the process that user B asks to use W; Step 109-112 is the process of checking copyright; Step 113-115 is the process judging infringement.Specifically comprise the following steps:
Step 101, author A send the copyright after signature to RAC.
The copyright of oneself is uploaded to RAC and carries out copyright registration by author A.Namely copyright Ss_A (W) after obtaining after utilizing private key to sign to the copyright W of author A signing, is committed to RAC by Ss_A (W).Private key and PKI all belong to public key cryptosyst, obtain when author registers to certificate verification center CA.
Step 102, RAC send the rear copyright of signature and timestamp.
The effect of RAC is embed digital watermark and the watermark information that detects in copyright in copyright.In order to protect the copyright of copyright W, RAC, after receiving copyright W, needs to be handled as follows it.First, after RAC utilizes public key verifications Ss_A (W) success, carry out Hash operation to W and obtain H (W), the Ss_RAC (H (W)) be made up of Ss_A (W), H (W) and the time stamp T that comprises the now time is sent to RMC by RAC.The effect of RMC is copyright registration, inquiry, digital product trade management and copyright arbitration.
Step 103, transmission success message.
RMC obtains W by author A, carries out Hash operation obtain H (W) to W, and after verifying Ss_RAC (H (W)) success according to H (W), RMC sends success message to RAC; If RMC verifies Ss_RAC (H (W)) failure, then process ends.
Step 104, structure watermark information.
The mark IDRAC that RAC utilizes copyright code name IDW, author identifies IDA, RAC and time stamp T structure watermark information M, embeds W and obtains watermark digit works MW by M.In watermark digit works MW, have copyright code name IDW, mark IDRAC that author identifies IDA, RAC and time stamp T.So when the entitlement needing enquiring digital works, only need input copyright code name just can be easy to obtain its author information and timestamp information.
Step 105, user B send the message of change watermark digit works to RAC by RMC.
When user B needs to use copyright MW, then need to send request to RMC, namely RMC is formed and retrieval transaction chain AB, and utilizes Hash operation to obtain unique identification H (AB).H (AB), IDB and MW are sent to RAC.Wherein, chain transaction is according to copyright W, and the author A of copyright W and user B is formed.
Wherein, the mark IDB of copyright code name IDW, the author mark IDRAC and user B that identify IDA, RAC all therefrom obtains.The effect of CA is to provide signing and issuing of letter of identity and issues.
Step 106, transmission comprise the copyright of new watermark to RMC.
After RAC examines IDB and MW, utilize H (AB), IDB and MW to construct watermark information MWB, and MWB is sent to RMC.Verification process is prior art.
Step 107, transmission comprise the copyright of new watermark to user B.
MWB RAC being sent to RMC is sent to user B, so that user B uses this copyright.
If the watermark information of not this user in the watermark digit works that user uses, so this user cannot normally use watermark digit works.Only have user in the watermark digit works used, have the watermark information of this user, just normally can use these watermark digit works.By adding the information of user in watermark digit works, thus this user can be made normally to use this watermark digit works.
Step 108, more new database.
RMC increases and upgrades the record of MW, and this record comprises the term of validity that user B uses copyright MW, and increases the copyright MWB identified with user B.
Step 105-step 108, RMC obtains new watermark digit works MWB for the mark IDB of user B and MW.Such user B just can normally use copyright W.
Step 109, send information to be verified.
Author A sends information to be verified to RAC, for proving that author A is the owner of W.Wherein, information to be verified comprises the mark IDA of IDW, time stamp T 0 and author A.Time stamp T 0 is the time that author A preserves registration W.
Step 110, solicited message.
RAC retrieves IDW in a database, then asks to RMC the watermark digit works MW that IDW is corresponding according to IDW.
Step 111, return message.
RMC returns the watermark digit works MW inquiring its correspondence according to IDW to RAC.
Step 112, RAC verify.
If the MW that MW and RMC retrieves from database is identical, then without the need to the proving time stabs T0 and IDA again, namely IDW, T0 and IDA are by checking, then author A is the author of copyright MW; Otherwise extract the watermark information of MW, judge whether the IDA in this watermark information equals IDA, and whether the T in this watermark information equals T0.If the IDA of this watermark information equals IDA, and T equals T0, then IDW, T0 and IDA are by checking, then author A is the author of copyright MW.Otherwise IDW, T0 and IDA be not by checking, and namely author A is not the author of copyright MW.
Step 113, send and treat judgement information.
IDA, IDB, T2 and MW are sent to RMC by author A, judge whether user encroaches right by RMC.T2 is the time that author A preserves registration W.
Step 114, RMC judge.
RMC checks the term of validity of MW from database, if do not arrive the term of validity, the author B that IDB is corresponding is validated user; Otherwise there is B if retrieve in the chain transaction of MW, author B is validated user, if do not retrieve in the chain transaction of MW, author B is not validated user.
Step 115, RMC send watermark digit works and judge to RAC, RAC.
RAC receives watermark digit works MW, IDA and T2 that RMC sends.RAC retrieves MW in a database, if the owner retrieving MW is A, then determines that A is the owner of MW; Otherwise, from MW, extracts watermark information, in watermark information, comprise IDA, and T2 equals T, then determine that A is the owner of MW, otherwise determine that A is not the owner of MW.
When author B is not validated user, and A is the owner of MW, then judge that B encroaches right.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1., based on a copy-right protection method for public key cryptosyst and digital watermarking, it is characterized in that, the method comprises:
Copyright Ss_A (W) after obtaining after utilizing private key to sign to the copyright W of author A signing, is committed to copyright authentication center RAC by Ss_A (W);
RAC utilizes public key verifications Ss_A (W) success, carry out Hash operation to W and obtain H (W), the Ss_RAC be made up of Ss_A (W), H (W) and time stamp T (H (W)) is sent to copyright management center RMC by RAC;
RMC obtains W by author A, carries out Hash operation obtain H (W) to W, and after verifying Ss_RAC (H (W)) success according to H (W), RMC sends success message to RAC;
The mark IDRAC that RAC utilizes copyright code name IDW, author identifies IDA, RAC and time stamp T structure watermark information M, embeds W and obtains watermark digit works MW by M;
Copyright is protected according to MW;
Author A sends IDW, time stamp T 0 and IDA, RAC to RAC and verifies IDW, T0 and IDA, and time stamp T 0 is the time that author A preserves registration W;
Described RAC verifies that IDW, T0 and IDA comprise, and RAC retrieves IDW in a database, then obtains MW according to IDW from RMC, if the MW that MW and RMC retrieves from database is identical, then IDW, T0 and IDA are by checking; Otherwise extract the watermark information of MW, judge whether the IDA in described watermark information equals IDA, and whether the T in described watermark information equals T0, if the IDA of described watermark information equals IDA, and T equals T0, then IDW, T0 and IDA are by checking, otherwise IDW, T0 and IDA be not by checking.
2. according to claim 1 based on the copy-right protection method of public key cryptosyst and digital watermarking; it is characterized in that; described according to MW protect copyright comprise; user B notifies that RMC changes MW; RMC obtains new watermark digit works MWB according to the mark IDB of user B and MW, MWB is sent to described user B.
3. according to claim 2 based on the copy-right protection method of public key cryptosyst and digital watermarking, it is characterized in that, described RMC identifies IDB and MW according to user and obtains new watermark digit works MWB and comprise, RMC is formed and retrieval transaction chain AB, and utilizes Hash operation to obtain unique identification H (AB); H (AB), IDB and MW are sent to RAC; After RAC examines IDB and MW, utilize H (AB), IDB and MW to construct watermark information MWB, and MWB is sent to RMC.
4., according to claim 2 based on the copy-right protection method of public key cryptosyst and digital watermarking, it is characterized in that, described MWB is sent to described user B after comprise further, RMC increases and upgrades the record of MW.
5. according to claim 1 based on the copy-right protection method of public key cryptosyst and digital watermarking; it is characterized in that, the mark IDA of described author A, the mark IDRAC of described RAC, the mark IDB of user B and the code name IDW of described copyright all obtain from certificate verification center CA.
6. according to claim 1 based on the copy-right protection method of public key cryptosyst and digital watermarking, it is characterized in that, described according to MW protect copyright comprise, IDA, the mark IDB of user B, T2 and MW are sent to RMC by author A, whether retrieve MW then directly judge whether author B is validated user according to RMC in the database of self; After RMC sends MW, IDA and T2 to RAC, RAC judges that whether author A is the owner of MW; When author B is not validated user, and A is the owner of MW, then judge that author B encroaches right.
7. according to claim 6 based on the copy-right protection method of public key cryptosyst and digital watermarking, it is characterized in that, describedly in the database of self, whether retrieve MW according to RMC and then directly judge whether author B is that validated user comprises, RMC checks the term of validity of MW from database, if do not arrive the term of validity, author B is validated user; Otherwise there is author B if retrieve in the chain transaction of MW, author B is validated user, if do not retrieve author B in the chain transaction of MW, author B is not validated user.
8., according to claim 6 based on the copy-right protection method of public key cryptosyst and digital watermarking, it is characterized in that, described RAC judges whether author B encroaches right and comprises, and RAC retrieves MW in a database, if the owner retrieving MW is A, then determines that A is the owner of MW; Otherwise, from MW, extracts watermark information, in watermark information, comprise IDA, and T2 equals T, then determine that A is the owner of MW, otherwise determine that A is not the owner of MW.
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| CN107026841B (en) | 2016-11-24 | 2021-07-30 | 创新先进技术有限公司 | Method and device for publishing works in network |
| CN110771093B (en) | 2017-06-20 | 2023-01-10 | 707 有限公司 | Method and system for proving existence of digital document |
| CN107798650B (en) * | 2017-09-18 | 2020-08-11 | 众安信息技术服务有限公司 | Digital asset infringement judgment method and device based on block chain |
| CN108763875A (en) * | 2018-05-29 | 2018-11-06 | 山东新潮信息技术有限公司 | The method that digital signature protection copyright is used to data authentication based on credible cloud platform |
| CN112119424A (en) | 2019-05-20 | 2020-12-22 | 创新先进技术有限公司 | Identifying copyrighted material using embedded copyright information |
| CN110809762A (en) | 2019-05-20 | 2020-02-18 | 阿里巴巴集团控股有限公司 | Identifying copyrighted material using embedded copyright information |
| SG11202001999UA (en) | 2019-05-20 | 2020-04-29 | Alibaba Group Holding Ltd | Identifying copyrighted material using embedded timestamped copyright information |
| EP3673391B1 (en) | 2019-05-20 | 2021-07-07 | Advanced New Technologies Co., Ltd. | Copyright protection based on hidden copyright information |
| SG11202002708TA (en) | 2019-05-20 | 2020-04-29 | Alibaba Group Holding Ltd | Identifying copyrighted material using embedded copyright information |
| WO2019141294A2 (en) | 2019-05-20 | 2019-07-25 | Alibaba Group Holding Limited | Identifying copyrighted material using copyright information embedded in tables |
| SG11202002616QA (en) | 2019-05-20 | 2020-04-29 | Alibaba Group Holding Ltd | Identifying copyrighted material using copyright information embedded in electronic files |
| PL3662637T3 (en) | 2019-05-20 | 2021-09-20 | Advanced New Technologies Co., Ltd. | Identifying copyrighted material using embedded copyright information |
| CN112597456A (en) * | 2020-12-30 | 2021-04-02 | 绿盟科技集团股份有限公司 | Watermark adding and verifying method and device for database |
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