CN109345223A - Block chain copyrighted digital content restoration methods and block chain operating platform - Google Patents
Block chain copyrighted digital content restoration methods and block chain operating platform Download PDFInfo
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Abstract
The invention discloses a kind of block chain copyrighted digital content restoration methods and block chain operating platform, the described method comprises the following steps: receiving the recovery request for the target copyrighted digital content that user issues；The public key information of the user is inquired, and inquires payment bill corresponding with the public key of the user, the copyright of the target copyrighted digital content has been possessed with the determination user；Confirm the recovery request, receive the predetermined quantity GAS of user's payment, and payment bill is broadcast on block chain；After block chain confirms the payment bill, encrypted digital content and corresponding public key are provided to the user, wherein the encrypted digital content is corresponding with the target copyrighted digital content.It can be realized the recovery to block chain copyrighted digital content using the present invention.
Description
Technical Field
The invention relates to a block chain copyright digital content recovery method and a block chain operation platform.
Background
Currently, DRM (Data Rights Management) technology is mostly used to protect digital contents. DRM technology is a technology for enhancing protection of digitized copyright. DRM technology can be applied to electronic books, electronic files, audio-video streaming media, graphic images, mobile multimedia, and the like, and has the core of digital encryption and rights control, the former can prevent illegal distribution of digital content, and the latter can limit the way in which digital content is used.
However, since the DRM technology adopts a traditional centralized management system to store information such as digital content, copyright owner, issuer, and user in the DRM system, the security of data storage is low, and if the DRM system is damaged or data is lost, the copyright information and copyright digital content will be lost, and if the digital content in the hands of the copyright owner is damaged or lost, the opportunity of digital content recovery will not be obtained, and the benefit of the copyright owner is damaged.
Disclosure of Invention
In view of this, the present invention provides a method for restoring block chain copyrighted digital content, by which a user can conveniently restore copyrighted digital content.
The invention also provides a block chain operation platform, and the block chain copyright digital content recovery method can be executed through the operation platform.
The invention provides a block chain copyright digital content recovery method, which comprises the following steps: s101, receiving a recovery request of target copyright digital content sent by a user; s102, inquiring the public key information of the user and inquiring a payment bill corresponding to the public key of the user so as to determine that the user already owns the copyright of the target copyright digital content; s103, confirming the recovery request, receiving a predetermined amount of GAS paid by a user, and broadcasting a bill for payment to a block chain; s104, after confirming the bill for payment by the blockchain, providing the encrypted digital content and the public key corresponding to the encrypted digital content to the user, wherein the encrypted digital content corresponds to the target copyright digital content.
According to the method for restoring blockchain copyrighted digital content according to the present invention, preferably, after step S102, the method further includes: inquiring whether encrypted digital content corresponding to the target copyright digital content exists, and if the encrypted digital content exists, entering a step S103; if the encrypted digital content does not exist, the resume request is not validated.
The invention also provides a block chain operation platform, which comprises: the receiving processing module is used for receiving a recovery request of the target copyright digital content sent by a user; the inquiry processing module is used for inquiring the public key information of the user and inquiring a payment bill corresponding to the public key of the user so as to determine that the user already owns the copyright of the target copyright digital content; the confirmation processing module is used for confirming the recovery request, receiving the predetermined amount of GAS paid by the user and broadcasting the bill of payment to the block chain; a content processing module for providing the encrypted digital content and a public key corresponding thereto to the user after confirming the bill for payment by blockchain, wherein the encrypted digital content corresponds to the target copyrighted digital content; the interface module is used for providing a platform interface corresponding to the block chain link point interface; and the storage module is used for caching the data of the block chain operation platform.
The blockchain operating platform according to the present invention preferably further includes: and the judgment processing module is used for inquiring whether the encrypted digital content corresponding to the target copyright digital content exists or not, and triggering the confirmation processing module if the encrypted digital content exists.
The invention also provides a block chain copyright digital content recovery method, which comprises the following steps: s201, inquiring target copyright information on a block chain operation platform, wherein the target copyright information comprises node information of target copyright digital content; s202, based on the target copyright information and the own public key, sending a recovery request of the target copyright digital content to a block chain operation platform; s203, after the block chain operation platform confirms the recovery request, paying a preset number of GAS to the block chain operation platform, and broadcasting a bill for payment to the block chain; s204, after confirming the bill for payment by the blockchain, downloading encrypted digital content and a public key corresponding to the encrypted digital content from a blockchain operating platform, wherein the encrypted digital content corresponds to the target copyright digital content; s205, decrypting the encrypted digital content by the private key owned by itself and the public key corresponding to the encrypted digital content.
According to the blockchain copyrighted digital content recovery method of the present invention, preferably, the encrypted digital content is decrypted using DH (Diffie-Hellman) key exchange algorithm.
The invention also provides a block chain copyright digital content recovery method, which comprises the following steps: s301, a user A queries target copyright information from a block chain operating platform and provides a public key PKa in an exchange key pair EKa owned by the user A to the block chain operating platform; wherein the target copyright information includes information of a node where the encrypted digital content is located and a copyright holder; s302, the block chain operation platform inquires and obtains the user B with the encrypted digital content from the block chain node, and notifies the encrypted digital content and the public key PKa of the user A to the user B; s303, the user B decrypts the encrypted digital content distributed by the block chain operation platform by using a private key owned by the user B to obtain original digital content; s304, generating an exchange key pair EKb by the user B, obtaining an encryption key Kb by using a private key in EKb and a public key PKa of the user A, encrypting the original digital content by using the Kb, and submitting the encrypted content and the public key PKb of the user B to a block chain operation platform; s305, the block chain operation platform informs the user A to download the encrypted content and the public key PKb of the user B; s306, the user A obtains a decryption password Ka based on a private key in the private key pair and a public key PKb of the user B, and decrypts the original digital content by using the decryption password Ka to complete the recovery of the copyright digital content; where Ka is consistent with Kb.
The invention also provides a block chain copyright digital content recovery method, which comprises the following steps: s401, receiving a recovery request of target copyright digital content sent by a user through a block chain operation platform, and inquiring public key information of the user; s402, inquiring a payment bill corresponding to the public key of the user to determine that the user already owns the copyright of the target copyright digital content; s403, confirming the recovery request, receiving a predetermined amount of GAS paid by a user, and broadcasting a bill for payment to the blockchain; s404, after confirming the bill for payment by the blockchain, providing the encrypted digital content and the public key corresponding to the encrypted digital content to the user, wherein the encrypted digital content corresponds to the target copyright digital content; wherein the blockchain operating platform comprises: a digital content receiving module for receiving digital content summary information and encrypted digital content; the digital content abstract information comprises a hash value corresponding to the original digital content; the encrypted digital content refers to a content obtained by encrypting an original digital content; the original digital content comprises one or more file contents capable of being processed digitally; a digital content publishing module for publishing the digital content summary information and the encrypted digital content on a blockchain; the digital content copyright inquiry module is used for inquiring copyright information of the digital content issued on the block chain; wherein the copyright information of the digital content includes: digital content summary information, block transaction summary information, and/or a block transaction ledger; the block transaction summary information comprises all transaction records of the current block and block transaction summary information corresponding to the previous block; the block transaction account book comprises a plurality of account book blocks arranged according to a generation time sequence, and each account book block comprises block transaction summary information corresponding to the account book block; wherein the transaction record includes the bill for payment; the receiving processing module is used for receiving a recovery request of the target copyright digital content sent by a user; the inquiry processing module is used for inquiring the public key information of the user and inquiring a payment bill corresponding to the public key of the user so as to determine that the user already owns the copyright of the target copyright digital content; the confirmation processing module is used for confirming the recovery request, receiving the predetermined amount of GAS paid by the user and broadcasting the bill of payment to the block chain; a content processing module for providing the encrypted digital content and a public key corresponding thereto to the user after confirming the bill for payment by blockchain, wherein the encrypted digital content corresponds to the target copyrighted digital content; the interface module is used for providing a platform interface corresponding to the block chain link point interface; and the storage module is used for caching the data of the block chain operation platform.
The invention also provides a block chain copyright digital content recovery method, which comprises the following steps: s501, receiving a recovery request of target copyright digital content sent by a user through a block chain operation platform, and inquiring public key information of the user; s502, inquiring a payment bill corresponding to the public key of the user to determine that the user already owns the copyright of the target copyright digital content; s503, confirming the recovery request, receiving a predetermined amount of GAS paid by the user, and broadcasting a bill for payment to the blockchain; s504, after confirming the bill for payment by the blockchain, providing the encrypted digital content and the public key corresponding to the encrypted digital content to the user, wherein the encrypted digital content corresponds to the target copyright digital content; wherein the blockchain operating platform comprises: a digital content receiving module for receiving digital content summary information and encrypted digital content; the digital content abstract information comprises a hash value corresponding to the original digital content; the encrypted digital content refers to a content obtained by encrypting an original digital content; the original digital content comprises one or more file contents capable of being processed digitally; a digital content publishing module for publishing the digital content summary information and the encrypted digital content on a blockchain; the digital content copyright inquiry module is used for inquiring copyright information of the digital content issued on the block chain; wherein the copyright information of the digital content includes: digital content summary information, block transaction summary information, and/or a block transaction ledger; the block transaction summary information comprises all transaction records of the current block and block transaction summary information corresponding to the previous block; the block transaction account book comprises a plurality of account book blocks arranged according to a generation time sequence, and each account book block comprises block transaction summary information corresponding to the account book block; wherein the transaction record includes the bill for payment; the receiving processing module is used for receiving a recovery request of the target copyright digital content sent by a user; the inquiry processing module is used for inquiring the public key information of the user and inquiring a payment bill corresponding to the public key of the user so as to determine that the user already owns the copyright of the target copyright digital content; the confirmation processing module is used for confirming the recovery request, receiving the predetermined amount of GAS paid by the user and broadcasting the bill of payment to the block chain; a content processing module for providing the user with encrypted digital content and a public key corresponding thereto after a blockchain validation of a payment bill, wherein the encrypted digital content corresponds to the target copyrighted digital content; the interface module is used for providing a platform interface corresponding to the block chain link point interface; the storage module is used for caching data of the block chain operation platform; and, the blockchain includes a first node for storing the digital content digest information, the encrypted digital content, the block transaction digest information, and the block transaction ledger.
According to the block chain copyright digital content recovery method, preferably, the block chain further includes a second node and/or a third node, and the second node is configured to store the digital content summary information, the block transaction summary information, and the block transaction ledger; the third node is used for storing the digital content summary information and the block transaction summary information.
If the user loses or damages the digital content file with copyright, the block chain copyright digital content recovery method can realize the re-downloading of the digital content, thereby realizing the recovery of the copyright digital content. By using the block chain operation platform, the user can conveniently perform the operation of the recovery request and the content downloading operation. Furthermore, the digital content in the recovery operation can be protected by using a proper encryption/decryption algorithm, and the safety of the operation process is higher.
Drawings
Fig. 1 is a block diagram illustrating a method for recovering copyrighted digital content according to the present invention.
Detailed Description
The present invention will be further described with reference to the following specific examples, but the scope of the present invention is not limited thereto.
The blockchain copyrighted digital content referred to in the present invention refers to digital content that is copyrighted over a blockchain. The block chain copyright digital content recovery method is realized by a user through operation of a block chain operation platform, the block chain operation platform has certain data processing capacity and data storage capacity, can be regarded as a user terminal, can be realized by a computer, and can also be realized by other terminals (such as intelligent terminal equipment, a smart phone, a tablet personal computer and the like) provided with a cache and a computing chip. The block chain may be a known block chain, or a digital rights block chain according to an embodiment of the present invention.
Each of which is described in detail below.
< Block chain copyright digital content recovery method >
After purchasing the block chain copyright digital content, if the digital content is lost or can not be used continuously due to damage in the using process, under the condition that the copyright of the digital content is still possessed, the block chain copyright digital content recovery method can pay a small amount of GAS to an operating platform to download and decrypt the digital content again for use.
Specifically, a user A queries target copyright information on a block chain operating platform, and sends a recovery request of target copyright digital content to the block chain operating platform based on the target copyright information and a public key owned by the user A; the target copyright information comprises node information of the target copyright digital content; after receiving a recovery request of the target copyright digital content sent by the user A, the blockchain operating platform queries the public key information of the user A and queries a payment bill corresponding to the public key of the user A to determine that the user A already owns the copyright of the target copyright digital content.
After the block chain operation platform confirms the recovery request, the user A pays a preset amount of GAS to the block chain operation platform after the block chain operation platform confirms the recovery request, and the block chain operation platform broadcasts a payment bill to the block chain after receiving the preset amount of GAS paid by the user; after the blockchain confirms the payment bill, the blockchain operating platform provides the encrypted digital content and the public key corresponding to the encrypted digital content to the user A, so that the user A downloads the encrypted digital content and the public key corresponding to the encrypted digital content from the blockchain operating platform, wherein the encrypted digital content corresponds to the target copyright digital content. After downloading, the user a decrypts the encrypted digital content by its own private key and the public key corresponding to the encrypted digital content.
Wherein the encrypted digital content may be decrypted using a DH (Diffie-Hellman ) key exchange algorithm. The existing DH key exchange algorithm is used for encryption processing, and the processing procedure is not described herein again.
In the above process, after determining that the user a already owns the copyright of the target copyrighted digital content, it may also be queried whether the encrypted digital content corresponding to the target copyrighted digital content exists, and if so, the subsequent processing is continuously performed; if not, the recovery request is not confirmed and the digital content recovery fails.
< Block chain operating platform >
Corresponding to the above method for recovering digital content of block chain copyright, the block chain operation platform of the present invention may include: the system comprises a receiving processing module, a query processing module, a confirmation processing module and a content processing module.
Specifically, the receiving processing module may receive a request for recovering the target copyrighted digital content from a user, and the query processing module may query the public key information of the user and query a payment bill corresponding to the public key of the user to determine that the user already owns the copyright of the target copyrighted digital content; the confirmation processing module can confirm the recovery request, receive a predetermined number of GASs paid by the user, and broadcast the bill of payment onto the blockchain; the content processing module may provide the encrypted digital content and a public key corresponding thereto to the user after confirming the payment bill by the blockchain, wherein the encrypted digital content corresponds to the target copyrighted digital content.
In addition, the blockchain operating platform further comprises a judgment processing module, an interface module and a storage module, wherein the judgment processing module can be used for inquiring whether encrypted digital content corresponding to the target copyright digital content exists or not, and triggering the confirmation processing module if the encrypted digital content exists; the interface module can provide a platform interface corresponding to the block chain link point interface; the storage module can cache data of the blockchain operating platform.
Furthermore, the blockchain operating platform can also receive the digital content uploaded by the user and distribute the digital content on the blockchain, and the digital content is realized through a digital content receiving module, a digital content distributing module and a digital content copyright inquiring module.
The digital content receiving module can receive the digital content summary information and the encrypted digital content; the digital content abstract information comprises a hash value corresponding to the original digital content; the encrypted digital content refers to a content obtained by encrypting an original digital content; the original digital content comprises one or more file contents capable of being processed digitally;
the digital content publishing module can publish the digital content summary information and the encrypted digital content on a blockchain;
the digital content copyright inquiry module can inquire the copyright information of the digital content issued on the block chain; wherein the copyright information of the digital content includes: digital content summary information, block transaction summary information, and/or a block transaction ledger; the block transaction summary information comprises all transaction records of the current block and block transaction summary information corresponding to the previous block; the block transaction account book comprises a plurality of account book blocks arranged according to a generation time sequence, and each account book block comprises block transaction summary information corresponding to the account book block; wherein the transaction record includes the bill for payment.
< Block chain >
The block chain of the present invention may include a Full Node information storage Node (Full Node) on which the digital content digest information, the encrypted digital content, the block transaction digest information, and the block transaction ledger are stored.
The blockchain of the present invention may further include a Digest information storage Node (Digest Node) on which the digital content Digest information, the block transaction Digest information, and the block transaction ledger are stored
The blockchain of the present invention may further include a Query information storage Node (Query Node) on which the digital content summary information and the block transaction summary information are stored.
In some embodiments of the invention, the blockchain and operating platform support the EtherFarC 20 Token standard.
The digital content summary information, the encrypted digital content, the block transaction summary information, and the block transaction ledger stored on a blockchain node are described in detail below.
< digital contents digest information >
The digital content digest information refers to a hash value of the original digital content that is not encrypted, the original digital content including one or more file contents that can be digitally processed, such as: audio file content, video file content, electronic book file content, and the like.
In a preferred embodiment of the present invention, the digital content digest information includes a hash value of the original digital content calculated using the SHA256 function, which is also referred to as "SHA 256 digest", having the SHA256 digest of the original digital content as digital content digest information thereof. The calculation process is described in the following sub-steps:
s101, dividing an entity file of original digital content into N sections of files;
s102, calculating the SHA256 abstract of each file in the N files by adopting an SHA256 function to obtain N SHA256 abstracts;
s103, combining the N SHA256 abstracts to obtain a string of combined data;
and S104, calculating the SHA256 abstract of the combined data by adopting an SHA256 function, and taking the calculation result as the digital content abstract information of the original digital content.
When the entity file is divided in S101, the first N-1 files in the N segments of files may have the same size, for example, for the first N-1 files, the length of each segment is 1MB, and if the nth segment, i.e., the last segment, is also 1MB, the N segments of files having the same size are obtained; and if the Nth section, namely the last section is less than 1MB, the actual length of the Nth section is taken, and N sections of files can be obtained, wherein the capacity of the last section of files is less than that of the (N-1) th section of files.
Since SHA256 digest has uniqueness, it can be used to uniquely identify the copyright of digital content. In subsequent copyright transactions, after the copyright receiver obtains the actual digital content, it can verify whether the digital content is the correct copyright content by its SHA256 digest.
< encrypted digital content >
The encrypted digital content refers to content obtained after encrypting the original digital content which is not encrypted. The copyright issuer issues the encrypted digital content on the blockchain, and when the copyright receiver obtains the encrypted digital content, it needs to decrypt it to obtain the actual digital content.
In a preferred embodiment of the present invention, the encryption process for the original digital content is as follows: generating a pair of asymmetric keys for original digital content by adopting a DH key exchange algorithm, wherein the asymmetric keys comprise public keys and private keys; and encrypting the original digital content by adopting the generated private key to obtain the encrypted digital content for being issued to the block chain.
For the encrypted digital content distributed to the blockchain, a copyright owner can decrypt the encrypted digital content by using a private key owned by the copyright owner, and besides, any other person on the blockchain cannot decrypt the encrypted digital content, so that the digital content distributed on the blockchain is protected.
< Block transaction summary information >
The block transaction summary information refers to the transaction summary information of the current block, which contains all transaction records of the current block and the transaction summary information of the previous block. In a preferred embodiment of the present invention, the block transaction summary information can be obtained by using SHA256 function calculation, and the calculation process is described as follows:
suppose that there are 3 transaction records in the current block, t1, t2 and t3 respectively; the transaction summary information of the previous block is h1, and the random number is r;
the transaction summary information h of the current block is:
h＝SHA256(t1，t2，t3，h1，r)；
wherein each of the transaction records (e.g. t1, t2 or t3) includes copyright transferor address information, copyright purchaser address information and copyright transaction amount; preferably, signature information of the copyright issuer may also be included.
The random number r needs to be selected, so that the first 20bits (i.e., the first 20 bits) of the transaction summary information h of the current block obtained by calculation are all 0. Here, the random number r needs to be selected through a large number of attempts to be determined, so that the random number r can be selected by a plurality of nodes at the same time, each node is guaranteed to have the same right of packaging the block account book, and the probability that the block account book information which is packaged is subsequently tampered is reduced to be extremely low.
< Block transaction Account book >
The block transaction account book comprises a plurality of account book blocks, each account book block corresponds to one block on the block chain, each account book block comprises block transaction summary information of the block, and the account book blocks are arranged according to the generation time sequence of the account book blocks. Since the block transaction summary information includes transaction records of all copyright transactions of the block, the block transaction book includes transaction records of all copyright transactions on the block chain, and is a collection of all copyright transaction records on the block chain.
It should be noted that, since the encrypted digital content is stored on the full information storage node, and all data is owned on the full information storage node, only the full information storage node of the block chain is involved in the process of recovering the copyrighted digital content. And other nodes are used for bill inquiry, balance inquiry, transaction and the like of the user.
Example 1
The block chain copyright digital content recovery method can be used for copyright recovery. User a originally has a copy of the copyrighted video file but cannot continue to use it because the file is lost or corrupted, and the copyright recovery process is described below.
① user A queries the blockchain platform for target copyright information including information of the node where the encrypted digital content is located and the copyright owner, and provides the public key PKa of its own exchange key pair EKa to the blockchain platform;
② the blockchain platform queries and obtains user B with the encrypted digital content from the blockchain node, and notifies user B of the encrypted digital content and user A's public key PKa;
③, decrypting the encrypted digital content distributed by the blockchain operating platform by using a private key owned by the user B to obtain original digital content;
④ user B generates a key exchange pair EKb, and uses the private key in EKb and the public key PKa of user A to obtain an encryption key Kb, uses Kb to encrypt the original digital content, and submits the encrypted content and the public key PKb of user B to the blockchain operation platform;
⑤ the blockchain operation platform informs user A to download the encrypted content and the public key PKb of user B;
⑥ user a obtains the decryption password Ka (Ka ═ Kb) based on the private key in its own key pair and the public key PKb of user B, and decrypts the original digital content using the decryption password Ka, completing the recovery of the copyrighted digital content.
The present invention is not limited to the above-described embodiments, and any variations, modifications, and substitutions which may occur to those skilled in the art may be made without departing from the spirit of the invention.
Claims (10)
1. A method for block chain copyrighted digital content recovery, said method comprising the steps of:
s101, receiving a recovery request of target copyright digital content sent by a user;
s102, inquiring the public key information of the user and inquiring a payment bill corresponding to the public key of the user so as to determine that the user already owns the copyright of the target copyright digital content;
s103, confirming the recovery request, receiving a predetermined amount of GAS paid by a user, and broadcasting a bill for payment to a block chain;
s104, after confirming the bill for payment by the blockchain, providing the encrypted digital content and the public key corresponding to the encrypted digital content to the user, wherein the encrypted digital content corresponds to the target copyright digital content.
2. The method for restoring blockchain copyrighted digital content according to claim 1, wherein after step S102, said method further comprises:
inquiring whether encrypted digital content corresponding to the target copyright digital content exists, and if the encrypted digital content exists, entering a step S103; if the encrypted digital content does not exist, the resume request is not validated.
3. A blockchain operating platform, comprising:
the receiving processing module is used for receiving a recovery request of the target copyright digital content sent by a user;
the inquiry processing module is used for inquiring the public key information of the user and inquiring a payment bill corresponding to the public key of the user so as to determine that the user already owns the copyright of the target copyright digital content;
the confirmation processing module is used for confirming the recovery request, receiving the predetermined amount of GAS paid by the user and broadcasting the bill of payment to the block chain;
a content processing module for providing the encrypted digital content and a public key corresponding thereto to the user after confirming the bill for payment by blockchain, wherein the encrypted digital content corresponds to the target copyrighted digital content;
the interface module is used for providing a platform interface corresponding to the block chain link point interface;
and the storage module is used for caching the data of the block chain operation platform.
4. The blockchain operations platform of claim 3, further comprising: and the judgment processing module is used for inquiring whether the encrypted digital content corresponding to the target copyright digital content exists or not, and triggering the confirmation processing module if the encrypted digital content exists.
5. A method for block chain copyrighted digital content recovery, said method comprising the steps of:
s201, inquiring target copyright information on a block chain operation platform, wherein the target copyright information comprises node information of target copyright digital content;
s202, based on the target copyright information and the own public key, sending a recovery request of the target copyright digital content to a block chain operation platform;
s203, after the block chain operation platform confirms the recovery request, paying a preset number of GAS to the block chain operation platform, and broadcasting a bill for payment to the block chain;
s204, after confirming the bill for payment by the blockchain, downloading encrypted digital content and a public key corresponding to the encrypted digital content from a blockchain operating platform, wherein the encrypted digital content corresponds to the target copyright digital content;
s205, decrypting the encrypted digital content by the private key owned by itself and the public key corresponding to the encrypted digital content.
6. A blockchain copyrighted digital content recovery method according to claim 5, wherein said encrypted digital content is decrypted using DH (Diffie-Hellman ) key exchange algorithm.
7. A method for block chain copyrighted digital content recovery, the method comprising:
s301, a user A queries target copyright information from a block chain operating platform and provides a public key PKa in an exchange key pair EKa owned by the user A to the block chain operating platform; wherein the target copyright information includes information of a node where the encrypted digital content is located and a copyright holder;
s302, the block chain operation platform inquires and obtains the user B with the encrypted digital content from the block chain node, and notifies the encrypted digital content and the public key PKa of the user A to the user B;
s303, the user B decrypts the encrypted digital content distributed by the block chain operation platform by using a private key owned by the user B to obtain original digital content;
s304, generating an exchange key pair EKb by the user B, obtaining an encryption key Kb by using a private key in EKb and a public key PKa of the user A, encrypting the original digital content by using the Kb, and submitting the encrypted content and the public key PKb of the user B to a block chain operation platform;
s305, the block chain operation platform informs the user A to download the encrypted content and the public key PKb of the user B;
s306, the user A obtains a decryption password Ka based on a private key in the private key pair and a public key PKb of the user B, and decrypts the original digital content by using the decryption password Ka to complete the recovery of the copyright digital content; where Ka is consistent with Kb.
8. A method for block chain copyrighted digital content recovery, said method comprising the steps of:
401, receiving a recovery request of target copyright digital content sent by a user through a block chain operation platform, and inquiring public key information of the user;
s402, inquiring a payment bill corresponding to the public key of the user to determine that the user already owns the copyright of the target copyright digital content;
s403, confirming the recovery request, receiving a predetermined amount of GAS paid by a user, and broadcasting a bill for payment to the blockchain;
s404, after confirming the bill for payment by the blockchain, providing the encrypted digital content and the public key corresponding to the encrypted digital content to the user, wherein the encrypted digital content corresponds to the target copyright digital content; wherein,
the blockchain operating platform comprises:
a digital content receiving module for receiving digital content summary information and encrypted digital content; the digital content abstract information comprises a hash value corresponding to the original digital content; the encrypted digital content refers to a content obtained by encrypting an original digital content; the original digital content comprises one or more file contents capable of being processed digitally;
a digital content publishing module for publishing the digital content summary information and the encrypted digital content on a blockchain;
the digital content copyright inquiry module is used for inquiring copyright information of the digital content issued on the block chain; wherein the copyright information of the digital content includes: digital content summary information, block transaction summary information, and/or a block transaction ledger; the block transaction summary information comprises all transaction records of the current block and block transaction summary information corresponding to the previous block; the block transaction account book comprises a plurality of account book blocks arranged according to a generation time sequence, and each account book block comprises block transaction summary information corresponding to the account book block; wherein the transaction record includes the bill for payment;
the receiving processing module is used for receiving a recovery request of the target copyright digital content sent by a user;
the inquiry processing module is used for inquiring the public key information of the user and inquiring a payment bill corresponding to the public key of the user so as to determine that the user already owns the copyright of the target copyright digital content;
the confirmation processing module is used for confirming the recovery request, receiving the predetermined amount of GAS paid by the user and broadcasting the bill of payment to the block chain;
a content processing module for providing the encrypted digital content and a public key corresponding thereto to the user after confirming the bill for payment by blockchain, wherein the encrypted digital content corresponds to the target copyrighted digital content;
the interface module is used for providing a platform interface corresponding to the block chain link point interface;
and the storage module is used for caching the data of the block chain operation platform.
9. A method for block chain copyrighted digital content recovery, said method comprising the steps of:
s501, receiving a recovery request of target copyright digital content sent by a user through a block chain operation platform, and inquiring public key information of the user;
s502, inquiring a payment bill corresponding to the public key of the user to determine that the user already owns the copyright of the target copyright digital content;
s503, confirming the recovery request, receiving a predetermined amount of GAS paid by the user, and broadcasting a bill for payment to the blockchain;
s504, after confirming the bill for payment by the blockchain, providing the encrypted digital content and the public key corresponding to the encrypted digital content to the user, wherein the encrypted digital content corresponds to the target copyright digital content; wherein,
the blockchain operating platform comprises:
a digital content receiving module for receiving digital content summary information and encrypted digital content; the digital content abstract information comprises a hash value corresponding to the original digital content; the encrypted digital content refers to a content obtained by encrypting an original digital content; the original digital content comprises one or more file contents capable of being processed digitally;
a digital content publishing module for publishing the digital content summary information and the encrypted digital content on a blockchain;
the digital content copyright inquiry module is used for inquiring copyright information of the digital content issued on the block chain; wherein the copyright information of the digital content includes: digital content summary information, block transaction summary information, and/or a block transaction ledger; the block transaction summary information comprises all transaction records of the current block and block transaction summary information corresponding to the previous block; the block transaction account book comprises a plurality of account book blocks arranged according to a generation time sequence, and each account book block comprises block transaction summary information corresponding to the account book block; wherein the transaction record includes the bill for payment;
the receiving processing module is used for receiving a recovery request of the target copyright digital content sent by a user;
the inquiry processing module is used for inquiring the public key information of the user and inquiring a payment bill corresponding to the public key of the user so as to determine that the user already owns the copyright of the target copyright digital content;
the confirmation processing module is used for confirming the recovery request, receiving the predetermined amount of GAS paid by the user and broadcasting the bill of payment to the block chain;
a content processing module for providing the encrypted digital content and a public key corresponding thereto to the user after confirming the bill for payment by blockchain, wherein the encrypted digital content corresponds to the target copyrighted digital content;
the interface module is used for providing a platform interface corresponding to the block chain link point interface;
the storage module is used for caching data of the block chain operation platform; and,
the blockchain includes a first node for storing the digital content summary information, the encrypted digital content, the block transaction summary information, and the block transaction ledger.
10. The blockchain copyrighted digital content recovery method according to claim 9, wherein the blockchain further comprises a second node and/or a third node, the second node being configured to store the digital content summary information, the block transaction summary information and the block transaction ledger; the third node is used for storing the digital content summary information and the block transaction summary information.
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