WO2020024184A1

WO2020024184A1 - Block chain based digital model sharing method, device, and system

Info

Publication number: WO2020024184A1
Application number: PCT/CN2018/098130
Authority: WO
Inventors: 郁彦彬
Original assignee: 西门子股份公司; 郁彦彬
Priority date: 2018-08-01
Filing date: 2018-08-01
Publication date: 2020-02-06

Abstract

The present invention provides a block chain based digital model sharing mechanism, comprising the following steps: obtaining one first model and signature information thereof published by a model designer, and pushing a disclosure message of the first model and the signature information thereof to a plurality of model analyzers; generating a data block of a block chain, wherein the data block comprises model feature index information generated by extracting model features of the first model by one model analyzer; and packing and encrypting the data block and one check code and then publishing the data block and the check code on a shared platform of a digital model. The digital model sharing mechanism provided in the present invention is safer, and allows publication and transaction of the digital model in a public environment.

Description

Sharing method, device and system of digital model based on blockchain

Technical field

The present invention relates to a blockchain, and in particular, to a method, a device, and a system for sharing digital models based on the blockchain.

Background technique

In industrial automation, various design models (such as 3D models) are digital assets that can be shared and reused. Designing 3D models that can reuse components is a highly efficient way to shorten the design cycle. However, most of this digital asset sharing is free now, so the biggest problem in sharing a digital asset is copyright protection. Sometimes it is not easy to encourage designers to share their design results. Moreover, after the design model is shared to the Internet, users cannot control these digital assets, and more importantly, the design cannot benefit from other users who use its design model. Now users must rely on databases established by CAD software vendors, etc., but building such databases takes more time and it is difficult to cover all industrial fields. The sharing economy is a very good business model for establishing a 3D model sharing ecosystem. A secure and neutral digital model trading model with IP protection is urgently needed in the industry.

Summary of the invention

A first aspect of the present invention provides a method for sharing a digital model based on a blockchain, which includes the following steps: obtaining a first model and its signature information disclosed by a model designer, and assigning the first model and its signature information Public information is pushed to multiple model analysts; a blockchain data block is generated, where the data block includes model feature index information generated by a model analyst by extracting model features of the first model, and The data block and a check code are packaged and encrypted, and then released on a digital platform sharing platform.

Further, the data block includes a header information and a body information, wherein the header information includes a verification code of a previous data block, a verification code of a current data block, and an encryption code, and the body information includes at least one entity information The entity information includes: model coding, designer identity coding, model feature retrieval, and model signature.

Further, the entity information further includes a model storage address, a model price, and a licensor type or a licensee type.

Further, the method for sharing a digital model based on a blockchain further includes the steps of matching model feature index information in the data block according to retrieval information input by a customer, and returning a corresponding data block corresponding to the data block according to the matching result. Digital model coding.

Further, the method for sharing a digital model based on a blockchain further includes the following steps: obtaining digital model order information of a customer, wherein the order information includes a digital model code to be purchased; according to a model analyst The calculated check code discloses the data block corresponding to the check code; check the digital model signature information and digital model code in the database, and when the digital model signature information and the digital model code correspond to each other, The payment for the price of the digital model is sent to the designer of the digital model.

Further, after the obtaining step, the method further includes a step of storing the first model disclosed by the model designer, and after the generating step, further includes the step of checking the stored first model disclosed by the model designer. Whether it is consistent with the first model in the data block published on the digital model sharing platform.

Further, before the storing step, the method further includes the step of: when the first digital model is based on another second digital model and an improved set thereof, checking the second signature information of the existing second digital model and The first signature information of the first digital model.

Further, the consensus mechanism of the blockchain includes any one of the following: POW, PBFT, RAFT.

A second aspect of the present invention provides a digital model sharing device based on a blockchain, wherein:

A first acquisition module, which acquires a first model and its signature information disclosed by a model designer, and pushes public information of the first model and its signature information to multiple model analysts; a generation module, which generates a block A data block of the chain, wherein the data block includes model feature index information generated by a model analyst by extracting model features of the first model, and the data block and a check code are packaged and encrypted to be released On the shared platform of digital models.

Further, the block-chain-based digital model sharing device further includes a matching module that matches the model feature index information in the data block according to the retrieval information input by the customer, and returns the data block corresponding according to the matching result. Digital model encoding.

Further, the block-chain-based digital model sharing device further includes: a second acquisition module that acquires customer digital model order information, wherein the order information includes a digital model code required to be purchased; A public module, which discloses the data block corresponding to the check code according to the check code calculated by the model analyst; a first checking module, which checks the digital model signature information and digital model code in the database, and when the digital model signature information and When the digital model codes correspond to each other, the payment paid by the customer based on the price of the digital model is sent to the designer of the digital model.

Further, the block-chain-based digital model sharing device further includes: a storage module that stores a first model disclosed by the model designer; and a second inspection module that checks the stored model model disclosed by the model designer Whether the first model is consistent with the first model in the data block published on the shared platform of the digital model.

Further, the block-chain-based digital model sharing device further includes a third checking module. When the first digital model is based on another second digital model and its improved set, it checks a second number that already exists. The second signature information of the model and the first signature information of the first digital model.

A blockchain-based digital model sharing system, including: a processor; and a memory coupled to the processor, the memory having instructions stored therein, the fingers causing the processor to execute the instructions when executed by the processor. The electronic device executes an action, the action includes: acquiring a first model and its signature information disclosed by a model designer, and pushing the public information of the first model and its signature information to multiple model analysts; generating a block A data block of the chain, wherein the data block includes model feature index information generated by a model analyst by extracting model features of the first model, and the data block and a check code are packaged and encrypted to be released On the shared platform of digital models.

Further, the action further comprises: matching model feature index information in the data block according to the retrieval information input by the customer, and returning a digital model code corresponding to the data block according to the matching result.

Further, the action further includes: obtaining digital model ordering information of the customer, wherein the ordering information includes a digital model code required to be purchased; and disclosing the check code corresponding to the check code calculated by the model analyst Check the digital model signature information and digital model code in the database, and when the digital model signature information and the digital model code correspond to each other, send the payment paid by the customer according to the price of the digital model to The designer of the digital model.

Further, after the acquiring action, the method further includes: storing the first model disclosed by the model designer, and after the generating action, the method further includes: checking the stored first model disclosed by the model designer and publishing the digital model. Whether the first models in the data blocks on the model sharing platform are consistent.

Further, before the storing action, the method further includes: when the first digital model is based on another second digital model and an improved set thereof, checking the second signature information of the existing second digital model and the first The first signature information of the digital model.

A fourth aspect of the present invention provides a computer program product that is tangibly stored on a computer-readable medium and includes computer-executable instructions that, when executed, cause at least one processor to execute a program according to The method according to the first aspect of the invention.

A fifth aspect of the present invention provides a computer-readable medium having stored thereon computer-executable instructions that, when executed, cause at least one processor to perform the method according to the first aspect of the present invention.

Compared with the existing digital model shared library, the present invention stores digital models in a decentralized structure. Since the records in the digital model sharing mechanism provided by the present invention cannot be changed, individuals can build a digital model library in an open environment. The present invention does not require large computing power to retrieve digital models, and digital model analysts can use their computing power to calculate digital indexes. In addition, model designers can track their designs to protect their intellectual property. The invention provides a secure and immutable digital model trading system.

The digital model sharing mechanism of the present invention utilizes the block chain to change the centralized management mode to the decentralized model management, and all records are unchangeable. The consensus mechanism of the present invention incorporates an indexing algorithm so that the computing power of a model analyst can be used to retrieve a digital model. The published digital model signature information can be used to protect the intellectual property rights of model designers and used for model retrieval, and the digital model will not be out of control when it is published on the open network.

In addition, the present invention has a first block chain as the main block chain, and the data blocks therein include information related to the digital model as the main content, thereby ensuring the security of assets. The present invention has a second block chain as a secondary block chain, wherein the data block contains transaction-related information as the main content and assists the main block chain to complete digital model transactions.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a block chain-based digital model sharing mechanism according to a specific embodiment of the present invention;

2 is a structure of each block in a blockchain in a blockchain-based digital model sharing mechanism according to a specific embodiment of the present invention;

3 is a POW consensus mechanism based on a blockchain-based digital model sharing method according to a specific embodiment of the present invention;

4 is a RAFT consensus mechanism based on a blockchain-based digital model sharing method according to a specific embodiment of the present invention;

5 is a schematic diagram of a digital model watermarking and generating an index for model retrieval based on a blockchain-based digital model sharing method according to a specific embodiment of the present invention.

detailed description

The following describes specific embodiments of the present invention with reference to the accompanying drawings.

The invention provides a blockchain-based digital model sharing mechanism, which can help designers share digital models and get paid when the design of these digital models is used by others. In addition, the digital model sharing platform provided by the present invention is safe and reliable, and can protect the intellectual property rights of designers. Among them, all designers can use others' models to build a more complex digital model without having to design from scratch. The digital model sharing platform provided by the present invention is constructed between a designer and a manufacturer / manufacturer, and includes a model library with many digital model designs. When the designer thinks about the design points of some digital models, he can retrieve useful model elements in the model library of the platform, in order to quickly and conveniently establish the final digital model of the designer. After the digital model is established, the designer can also upload the digital model he designed to the model library to help others reuse the model, and mark his own digital security mark to protect intellectual property rights. At the same time, suppliers can also retrieve model libraries and obtain licenses for digital models they consider valuable, and use digital assets to make profits in subsequent production operations. Designers can also benefit from vendors that use their digital models, such as business compensation. In particular, the digital model is a 3D model, and the following description will be made by taking the digital model as a 3D model as an example.

The invention utilizes the concept of Block Chain, which is a network digital sharing trading platform based on distributed data storage, point-to-point transmission, and encryption verification algorithms. The core of the blockchain lies in decentralization and how to reach consensus in an insecure environment. Different nodes use mathematical algorithms to establish trust and gain rights among themselves. In order to make data transmission and transactions in the blockchain orderly, a series of mathematical algorithms are used to generate data blocks with a certain order.

FIG. 1 is a schematic diagram of a block chain-based digital model sharing mechanism according to a specific embodiment of the present invention. As shown in Figure 1, there are three roles on the blockchain-based digital model sharing platform. One of them is a model designer who can publish model works on the digital model sharing platform and enjoy the intellectual property rights of the digital model works, and license the digital models he designs to others to use and get paid. The other is a customer, that is, a digital model purchaser, usually a supplier or a manufacturer, which selects the digital model to be purchased by indexing on the platform through its required digital model features. The last role is the analyst. After the model designer releases the digital model, the analyst extracts model features and helps to generate digital model feature indexes. The analyst encapsulates the above content in data blocks according to the concept of the blockchain. A series of decryption verifications and calculations to generate the entire ordered blockchain and facilitate transactions.

Among them, the digital model's sharing mechanism architecture includes an application layer 100 (application layer), a blockchain backbone network (block chain backbone) 200, and an extension layer (extension layer) 300.

The model designer is connected to the application layer 100 through an application program (for example, an app) in an electronic device, which includes a personal computer, a mobile phone, and the like. The application layer 100 further includes a recording module 110, a retrieval transaction module 120, and a digital model software plug-in 130. Specifically, the recording module 110 is used to provide software designer D to upload records of digital models, digital model transactions, and obtain remuneration, etc., and the retrieval transaction module 120 provides software designer D to retrieve digital models and web pages of their transactions. It is an interface for model designers to upload digital models on the sharing platform provided by the present invention based on blockchain digital models. In particular, the digital model software plug-in 130 is a CAD software plug-in (Plug-in for CAD software). Specifically, the application layer 100 can allow model designers to manage their recording module 110 and the 3D digital models provided therein, as well as publicize the 3D models through the URLs used for retrieval and trading, retrieve digital model libraries, and license existing 3D models . It should be noted that, in addition to the model designer, a customer or a supplier may also be connected to the application layer 100 through the electronic device including a personal computer, a mobile phone, etc., and record its transaction records and the like through the recording module 110.

Among them, the blockchain backbone network 200 provides basic blockchain features, such as a first blockchain 210 and a second blockchain 220. Specifically, the first block chain 210 is arranged in a certain order and uses a digital model as the main data block content. The first block chain 210 is an immutable record. The difference between the second blockchain 220 and the first blockchain 210 is that the second blockchain 220 is based on digital model transaction bids, deals, and other information, and it exists as a sidechain. . The second blockchain 220 is an assignment to the first blockchain 210 as the blockchain ledger, which runs in parallel with the first blockchain 210, where entries from the first blockchain 210 can be accessed by the second Blockchain 220 is linked, which allows the second blockchain 220 to operate independently of the primary blockchain.

The extension layer 300 provides some functions that support the entire system. The extension layer 300 includes an automatic contract module (Smart contract) 310, a digital model security marking module 320, a digital model feature indexing module 330, and a model storage module 340. Among them, the automatic contracting module 310 is used for transmitting digital resources, automatically dispatching and uniform model license fees. The digital model security mark module 320 is specifically a 3D security mark module, which can apply a non-removable and invisible security mark on the 3D model, such as a watermark or the like. The digital model security marking module 320 can track the version and copyright of the 3D model. The digital model feature indexing module 330 is another important system module, which enables end users to quickly find the correct 3D model. The model storage module 340 is used to store model files, and the decentralized storage or decentralized database makes the entire system more secure and reliable. Distributed storage is also one of the main features of the blockchain.

A first aspect of the present invention provides a method for sharing a digital model based on a blockchain, which includes the following steps:

First, step S1 is performed to obtain a first model and its signature information disclosed by the model designer, and push the public messages of the first model and its signature information to multiple model analysts E. Specifically, the model designer uploads the digital model through the digital model software plug-in 130 in the application layer 100, for example, the CAD software plug-in uploads the 3D model on the blockchain-based digital model sharing platform provided by the present invention, where the digital model software plug-in 130 may be an application on a personal computer or a mobile phone. And in order to ensure intellectual property rights and later obtain licenses by licensing their digital models to others, it is necessary to add signature information to the digital models. Therefore, the digital models and their signature information are finally uploaded to the digital model sharing platform.

In addition, the present invention also allows model designers to retrieve digital models published by others on the platform through the retrieval transaction module 120 in the application layer 100, and adds new model features to form new digital models based on the digital model designs of others. For this secondary design model, the initial digital model should have someone else's signature, and the model designer can add the final new digital model with his own signature information when redesigning the initial digital model, thus ensuring knowledge Clear property rights.

After the model designer uploads the digital model, the present invention obtains the digital model and its signature information disclosed by the model designer by connecting the application of the model designer, and pushes the message "the first digital model has been uploaded" to multiple Model analyst E.

Step S2 is then executed to generate a data block of the blockchain, wherein the data block includes model feature index information generated by a model analyst by extracting model features of the first model, and the data block and a The checksum is packaged and encrypted and published on the digital platform's shared platform. Among them, the feature index is generated by a feature extraction algorithm and used for user retrieval.

The step S2 further includes the following sub-steps:

Step S21, generating a data block of the blockchain, wherein the data block includes model feature index information generated by a model analyst E by extracting model features of the first model. The data blocks of the blockchain generated in this step are specifically the first data block B ₁₁ , the second data block B ₁₂ , the third data block B ₁₃ , and the fourth data block B in the first blockchain 210. _14, the fifth data block B _15, a sixth data block B ₁₆ ...... N-th data block B _1n, said data blocks are uploaded to the model designer digital model as the main content and a certain order of arrangement. A blockchain is a sequence of a collection of facts. In order to maintain the orderlyness of the entire sharing platform and facilitate transactions, the first data block B ₁₁ , the second data block B ₁₂ , the third data block B ₁₃ , the fourth data block B ₁₄ , and the fifth in the first blockchain 210 The data block B ₁₅ , the sixth data block B _16, ... the N- _th data block B _{1n are} sequentially arranged, and the arrangement order cannot be changed. The content and structure of the data blocks are consistent. Specifically, the foregoing includes model model index information generated by a model analyst E by extracting model features of the first model. The model analyst receives the message that the "first digital model has been uploaded" to grab the order, completes the feature extraction by calculating according to a specific algorithm to generate an index, and sends the data block to the platform immediately after completion to indicate whether it is The first complete model analyst of the entire system, thereby gaining benefits. For example, the model analyst completes the second data block B _12. Before uploading the data block, the previous data block, that is, the first data block B _{11 must} be checked. ₁₂ Cannot upload. It should be noted that the process of verifying the above-mentioned first data block B ₁₁ is the process of reaching consensus on the platform, and the completion of the verification of the first data block B _{11 will} obtain all the data analysts on the platform regarding the first data block B. The model features of a digital model in ₁₁ have been recognized for feature index extraction. Similarly, in this embodiment, although the second data block B ₁₂ has been uploaded, the recognition of the second data block B ₁₂ must be completed after the verification. The verification of each data block depends on the previous one. The calculation result of the data block ... and so on, to form the entire first blockchain 210.

2 is a structure of each block in a blockchain in a blockchain-based digital model sharing mechanism according to a specific embodiment of the present invention. According to a preferred embodiment of the present invention, the first data block B ₁₁ , the second data block B ₁₂ , the third data block B ₁₃ , the fourth data block B ₁₄ , and the fifth data block B ₁₅ in the first blockchain 210. The sixth data block B ₁₆ ... N- _th data block B _1n has a structure as shown in FIG. 2. Take the second data block B ₁₂ as an example, which takes the first model as the main content. The second data block B ₁₂ includes a header information and a body information. Wherein said information T includes a first rise of the block B ₁₁ of the authentication code, a second authentication code data blocks B _12, the second encrypted data block B _12. Specifically, the subject information includes first entity information, second entity information, and the nth entity information. Exemplarily, the first entity information further includes: model code, permission type, designer identity code, model feature retrieval, model signature information, model storage address, price, and the like. The license type includes a licensor type or a licensee type. Further, the model storage address is mapped into the model storage module 340 as shown in FIG. 1 to retrieve the model. The signature information includes all necessary information for the digital model, such as ID, model owner information, price, data, and version. Among them, the signature information is also added to the digital model as a security mark. The model address (such as a URI) refers to where the file is stored. Model price Price refers to the total price of the digital model, including the price of the model and its related components. A block in the blockchain includes a data header and a body. If the POW sharing mechanism is used, the verification code of the previous block and the existing block in the header information is a hash code. The header information also includes the version, timestamp, bits, and nonce of the blockchain. Among them, each entity can represent a model copyright or a license announcement. The two entities share the same structure, and the ID is a special code for the entity. The type indicates the type of behavior of this entity. Specifically, the licensee means that the entity is used to announce copyright and owner ID, and the owner refers to the author of this digital model. The licensee means that this entity is used to announce the transaction and owner ID of the digital model, where the owner is the purchaser of the digital model.

Further, the method for sharing a digital model based on a blockchain provided by the present invention further includes the steps of matching the model feature index information in the data block according to the retrieval information input by the customer, and returning the corresponding data block according to the matching result. Digital model encoding. For example, if a customer inputs an "automotive assembly line drive model" and its specific model features, the present invention matches the first data block B ₁₁ and the second data block B in the first blockchain 210 in the first blockchain according to the search information. ₁₂ , the third data block B ₁₃ , the fourth data block B ₁₄ , the fifth data block B ₁₅ , the sixth data block B _16, ... the model feature retrieval information of the Nth data block B _1n , and the information matches based on the model feature retrieval information. The first data block B ₁₁ , the second data block B ₁₂ , the third data block B ₁₃ , the fourth data block B ₁₄ , the fifth data block B ₁₅ , the sixth data block B ₁₆ in the first blockchain 210 ... ... model feature index information in the Nth data block B _1n . Suppose the index matched to the model feature information ₁₂ of the second block B, the matching results are returned based on the digital model of the encoded second data block ₁₂ corresponding B. Users can view the digital model and pricing based on the digital model code.

In addition, as shown in FIG. 1, the sharing mechanism architecture of the digital model provided by the present invention further includes a second blockchain 220 having a first data block B ₂₁ , a second data block B ₂₂ , and a third data block B ₂₃ . The fourth data block B ₂₄ , the fifth data block B ₂₅ , the sixth data block B _26, ... the N-th data block B _2n . Different from the first block chain 210, the data blocks in the second block chain 220 are mainly transaction contents. For example, the main content of the first data block B ₂₁ is "Customer A wants to buy the B car assembly line drive model, the price is C", and the main content of the second data block 22 is "Customer A paid for the B car assembly line drive model. C ", the main content of the third data block 23 is" C has paid to the model designer of the driving model of the B automobile assembly line ". The second blockchain 220 also has the characteristics of a typical blockchain, where the first data block B ₂₁ , the second data block B ₂₂ , the third data block B ₂₃ , the fourth data block B ₂₄ , and the fifth data block B _{25. The} sixth data block B ₂₆ ... The N-th data block B _2n also has a data block structure as shown in FIG. 2.

Specifically, according to a preferred embodiment of the present invention, the method for sharing a digital model based on a blockchain provided by the present invention further includes the following steps: First, obtain the customer's digital model ordering information, "Customer A buys a B assembly line driver The model paid C ”, where“ Customer A paid C for purchasing the B vehicle assembly line driving model ”in the order information includes the digital model code required to be purchased. Then, the data block B ₂₂ corresponding to the check code is disclosed according to the check code calculated by the model analyst; the digital model signature information and the digital model code in the database are checked, and when the digital model signature information and the digital model code are mutually When corresponding, the payment made by the customer based on the price of the digital model is sent to the designer D of the digital model.

Further, after the obtaining step S1, the method further includes the step of storing a first model disclosed by the model designer. Specifically, after the model analyst extracts the model features of the first model and generates a feature index according to the model features, the first model is stored in the model storage module 340 shown in FIG. 1. Further, after the generating step S2, the method further includes the step of checking whether the stored first model disclosed by the model designer is consistent with the first model in the data block published on the shared platform of the digital model.

Further, before the storing step, the method further includes the step of: when the first digital model is based on another second digital model and an improved set thereof, checking the second signature information of the existing second digital model and The first signature information of the first digital model. Specifically, the present invention allows a model designer to query a work that has been designed by others on a shared platform, and adds new model features based on the work that others have designed to generate a new digital model. In order to protect the intellectual property rights of all model designers, works already designed by others should have designer signature information, and new digital models should also have designer signature information. In other words, the new digital model should be a collection of works that have been designed by others and their signatures plus new technical features, and the signature of the new digital model designer.

Specifically, the consensus mechanism of the blockchain adopted by the present invention includes POW, PBFT, and RAFT. Among them, POW is applicable to the open environment and requires a digital asset token. The consensus mechanism of PBFT and RAFT is more suitable for system management supervised by a third party. According to different application scenarios, the present invention can select different consensus mechanisms.

As shown in FIG. 3, if the consensus mechanism of POW is adopted, the model designer first signs the designed first digital model and discloses the digital model and its signature information. The model analyst extracts the model features of the digital model based on standard algorithms and generates model feature index information based on the model features. If this is based on an existing digital model and its improved composite digital model, it is necessary to check the existing ones separately. Digital model and composite digital model signature information. After checking the signature information, the model analyst packages and uploads the existing digital model and composite digital model and their signature information to the model storage module 340. The model analyst calculates the nonce and exposes the data block including the model features and their feature indexes, and then triggers an automatic check of digital model inventory and signature information. On the side of the customer who purchased the digital model, the customer submitted a purchase order including a specific digital model number. The model analyst calculates the nonce and exposes a data block including purchase order information. Then trigger the automatic check of the digital model signature information and send the reward to the digital model designer. Finally, feedback to customers.

The difference between the PBFT consensus mechanism and the POW consensus mechanism is that the PBFT consensus mechanism does not need to be verified, the model analyst does not need to grab new digital models in the system to generate data packets, and the model analyst does not have a lot of money. After the model analyst extracts the model features of the digital model based on the standard algorithm and generates model feature index information based on the model features, the data block needs to be broadcast. Then other model analysts acknowledge the data block after verification, broadcast the acknowledgement information to all nodes, and broadcast the acknowledgement information after receiving the acknowledgement information from another model analyst, and finally feedback to the client. Similarly, other model analysts will broadcast the acknowledgement information after they acknowledge the data block, and broadcast the acknowledgement information after receiving the acknowledgement information from another model analyst. Similarly, on the client side of the purchase data model, after the model analyst uploads a data block including the customer's purchase order information, other model analysts will broadcast the acknowledgement information after acknowledging the data block, and upon receiving the data from another model The approval information of the analyst broadcasts the approval information later.

FIG. 4 is a RAFT consensus mechanism based on a blockchain-based digital model sharing method according to a specific embodiment of the present invention. As shown in FIG. 4, the model designer first signs the designed first digital model and discloses the digital model and its signature information. Similarly, the model analyst extracts model features of digital models based on standard algorithms and generates model feature index information based on the model features. If this is based on an existing digital model and its improved composite digital model, it is necessary to check separately Signature information for existing digital models and composite digital models. Compared with the POW consensus mechanism, the difference is that the RAFT consensus mechanism has a leader, and others are regarded as followers. The reporter broadcasts the message to followers. After the status is synchronized, it is fed back to the model designer. After checking the signature information, the model analyst packages and uploads the existing digital model and composite digital model and their signature information to the model storage module 340. On the side of the customer who purchased the digital model, the customer submitted a purchase order including a specific digital model number. The keeper broadcasts a data block including purchase order information. Then trigger the automatic check of the digital model signature information and send the reward to the digital model designer. Finally, after the status is synchronized, it is fed back to the customer.

5 is a schematic diagram of a digital model watermarking and generating an index for model retrieval based on a blockchain-based digital model sharing method according to a specific embodiment of the present invention. This embodiment uses a POW consensus mechanism, and the digital model is preferably a 3D model.

Among them, the present invention mainly depends on two technologies, one is an algorithm for generating an index for retrieving a 3D model from a 3D model library, and the other main technology is a method of attaching a watermark to a 3D model in order to protect copyright. Specifically, the algorithm for retrieving a 3D model includes a mixture of multiple features that increase retrieval accuracy, and also includes a 3D tooth and model hash method based on robust, safe, and unique target feature vectors. Among them, the hash method uses the highest surface area of the 3D model as the distance of the feature target. The 3D model includes multiple targets and permutations that represent the feature target group, and is generated by binarization of feature values. A binary hash (binary hash) is calculated by a combination of group values and random keys. Algorithms for retrieving 3D models also include blind watermarking algorithms for 3D meshes, which are based on a spherical pseudo-random bumped surface to disturb the commanding heights of the digital model. Position (the position of the vertices of the model). In order to obtain robustness while keeping the minimum deformation curvature, the watermark is implanted into a low-resolution version of the mesh. Among them, the watermark reply is completed by a standard correlation detector.

Specifically, as shown in FIG. 5, according to a preferred embodiment of the present invention, a harsh value is first calculated for a digital model feature of a 3D model, and a harsh value having model feature information is stored in a model block for entity feature model retrieval. in. Specifically, the first entity information shown in FIG. 5 is the first entity information of the second data block B12 shown in FIG. 2. Then, the other model signature information in the first entity information and the hash value having model feature information are used to generate a watermark signature, and the watermark signature is applied to the digital model, and finally a 3D model with the watermark signature is obtained. The other signature information includes information such as model code, model designer, price, time, and version.

A first acquisition module, which acquires a first model and its signature information disclosed by a model designer, and pushes public messages of the first model and its signature information to multiple model analysts;

A generating module that generates a data block of a blockchain, wherein the data block includes model feature index information generated by a model analyst by extracting model features of the first model, and combines the data block with a calibration The verification code is packaged and encrypted and published on the digital platform's shared platform.

The digital model sharing mechanism of the present invention utilizes the block chain to change the centralized management mode to the decentralized model management, and all records are unchangeable. The consensus mechanism of the present invention incorporates an indexing algorithm so that the computing power of a model analyst can be used to retrieve a digital model. The public digital model signature information can be used to protect the intellectual property rights of model designers, as well as for model retrieval, and the digital model will not be out of control when it is published on the open network.

Although the content of the present invention has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as limiting the present invention. Various modifications and alternatives to the present invention will become apparent to those skilled in the art after reading the foregoing. Therefore, the protection scope of the present invention should be defined by the appended claims. Furthermore, any reference signs in the claims shall not be construed as limiting the claims involved; the word "comprising" does not exclude other claims or means or steps not listed in the description; "first", "the Words such as "two" are used only for names, and not for any particular order.

Claims

A method for sharing a digital model based on a blockchain, which includes the following steps:

Acquiring a first model and its signature information disclosed by a model designer, and pushing public messages of the first model and its signature information to multiple model analysts;

Generating a data block of the blockchain, wherein the data block includes model feature index information generated by a model analyst by extracting model features of the first model,

The data block and a check code are packaged and encrypted, and then released on a digital model sharing platform.
The method for sharing a digital model based on a blockchain according to claim 1, wherein the data block includes a header information and a subject information, wherein the header information includes a verification code of a previous data block, The verification code and encryption code of the current data block, the subject information includes at least one entity information, and the entity information includes: model code, designer identity code, model feature retrieval, and model signature.
The method for sharing a digital model based on a blockchain according to claim 2, wherein the entity information further comprises a model storage address, a model price, and a licensor type or a licensee type.
The method for sharing a digital model based on a blockchain according to claim 1, wherein the method for sharing a digital model based on a blockchain further comprises the following steps:

The model feature index information in the data block is matched according to the retrieval information input by the customer, and the digital model code corresponding to the data block is returned according to the matching result.
The method for sharing a digital model based on a blockchain according to claim 4, wherein the method for sharing a digital model based on a blockchain further comprises the following steps:

Obtaining the customer's digital model ordering information, where the ordering information includes a digital model code to be purchased;

Disclose the data block corresponding to the check code according to the check code calculated by the model analyst;

Check the digital model signature information and digital model code in the database, and when the digital model signature information and the digital model code correspond to each other, send the payment paid by the customer according to the price of the digital model to the digital model Designer.
The method for sharing a digital model based on a blockchain according to claim 1, further comprising the following steps after the obtaining step:

Storing a first model disclosed by the model designer,

After the generating step, the following steps are included:

It is checked whether the stored first model disclosed by the model designer is consistent with the first model in the data block published on the shared platform of the digital model.
The method for sharing a digital model based on a blockchain according to claim 6, further comprising the following steps before the storing step:

When the first digital model is based on another second digital model and its improved set, the second signature information of the second digital model that already exists and the first signature information of the first digital model are checked.
The method for sharing a digital model based on a blockchain according to claim 1, wherein the consensus mechanism of the blockchain includes any one of the following: POW, PBFT, RAFT.
Blockchain-based digital model sharing device, including:

A first acquisition module, which acquires a first model and its signature information disclosed by a model designer, and pushes public messages of the first model and its signature information to multiple model analysts;

A generating module that generates a data block of a blockchain, wherein the data block includes model feature index information generated by a model analyst by extracting model features of the first model, and combines the data block with a calibration The verification code is packaged and encrypted and published on the digital platform's shared platform.
The device for sharing a digital model based on a blockchain according to claim 9, wherein the data block includes a header information and a subject information, wherein the header information includes a verification code of a previous data block, The verification code and encryption code of the current data block, the subject information includes at least one entity information, and the entity information includes: model code, designer identity code, model feature retrieval, and model signature.
The device for sharing a digital model based on a blockchain according to claim 10, wherein the entity information further comprises a model storage address, a model price, and a licensor type or a licensee type.
The device for sharing a digital model based on a blockchain according to claim 9, wherein the device for sharing a digital model based on a blockchain further comprises a matching module that matches the data according to retrieval information input by a customer The model feature index information in the block, and the digital model code corresponding to the data block is returned according to the matching result.
The device for sharing a digital model based on a blockchain according to claim 12, wherein the device for sharing a digital model based on a blockchain further comprises:

A second obtaining module, which obtains order information of a digital model of a customer, wherein the order information includes a digital model code required to be purchased;

A public module, which discloses a data block corresponding to the check code according to the check code calculated by the model analyst;

A first checking module that checks digital model signature information and digital model code in a database, and when the digital model signature information and the digital model code correspond to each other, the payment made by the customer according to the price of the digital model Send to the designer of the digital model.
The device for sharing a digital model based on a blockchain according to claim 9, wherein the device for sharing a digital model based on a blockchain further comprises:

A storage module that stores a first model disclosed by the model designer;

The second checking module checks whether the stored first model disclosed by the model designer is consistent with the first model in the data block published on the shared platform of the digital model.
The device for sharing a digital model based on a blockchain according to claim 14, wherein the device for sharing a digital model based on a blockchain further comprises a third checking module, and when the first digital model is based on another When the second digital model and its improved set, it checks the second signature information of the existing second digital model and the first signature information of the first digital model.
The device for sharing a digital model based on a blockchain according to claim 9, wherein the consensus mechanism of the blockchain includes any one of the following: POW, PBFT, RAFT.
Blockchain-based digital model sharing system, including:

Processor; and

A memory coupled with the processor, the memory having instructions stored therein, the instructions, when executed by the processor, cause the electronic device to perform an action, the action including:

Acquiring a first model and its signature information disclosed by a model designer, and pushing public messages of the first model and its signature information to multiple model analysts;

Generating a data block of the blockchain, wherein the data block includes model feature index information generated by a model analyst by extracting model features of the first model,

The data block and a check code are packaged and encrypted, and then released on a digital model sharing platform.
The sharing system based on a blockchain-based digital model according to claim 17, wherein the data block includes a header information and a subject information, wherein the header information includes a verification code of a previous data block, The verification code and encryption code of the current data block, the subject information includes at least one entity information, and the entity information includes: model code, designer identity code, model feature retrieval, and model signature.
The system for sharing a digital model based on a blockchain according to claim 18, wherein the entity information further comprises a model storage address, a model price, and a licensor type or a licensee type.
The system for sharing a digital model based on a blockchain according to claim 17, wherein the action further comprises:

The model feature index information in the data block is matched according to the retrieval information input by the customer, and the digital model code corresponding to the data block is returned according to the matching result.
The system for sharing a digital model based on a blockchain according to claim 20, wherein the action further comprises:

Obtaining the customer's digital model ordering information, where the ordering information includes a digital model code to be purchased;

Disclose the data block corresponding to the check code according to the check code calculated by the model analyst;

Check the digital model signature information and digital model code in the database, and when the digital model signature information and the digital model code correspond to each other, send the payment paid by the customer according to the price of the digital model to the digital model Designer.
The system for sharing a digital model based on a blockchain according to claim 17, further comprising:

Storing a first model disclosed by the model designer,

After the generating action, the method further includes:

It is checked whether the stored first model disclosed by the model designer is consistent with the first model in the data block published on the shared platform of the digital model.
The sharing system based on a blockchain-based digital model according to claim 22, before the storing action, further comprising:

When the first digital model is based on another second digital model and its improved set, the second signature information of the second digital model that already exists and the first signature information of the first digital model are checked.
The method for sharing a digital model based on a blockchain according to claim 17, wherein the consensus mechanism of the blockchain includes any one of the following: POW, PBFT, RAFT.
A computer program product tangibly stored on a computer-readable medium and including computer-executable instructions that, when executed, cause at least one processor to perform any of the claims 1 to 16 The method of one item.
A computer-readable medium having computer-executable instructions stored thereon which, when executed, cause at least one processor to perform the method according to any one of claims 1 to 16.