CN115879063B - Proving method and system of 3D printing works based on blockchain - Google Patents
Proving method and system of 3D printing works based on blockchain Download PDFInfo
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- CN115879063B CN115879063B CN202310147028.7A CN202310147028A CN115879063B CN 115879063 B CN115879063 B CN 115879063B CN 202310147028 A CN202310147028 A CN 202310147028A CN 115879063 B CN115879063 B CN 115879063B
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Abstract
The invention discloses a proving method of 3D printing works based on blockchain, wherein a 3D printing server receives a user access request, and the relationship between data to be processed in the 3D printing server and blockchain used for proving is uplink storage; after receiving the access request, the 3D printing server establishes a secure data transmission channel with the user client, the user uploads the model data to be subjected to 3D printing through the transmission channel, the 3D printing server processes the received model data, digital signature data of the user is added at a preset slicing position to obtain rewritten model data, the rewritten model data is printed according to the rewritten model data, the 3D printing server evaluates the printed work after the printing is finished, judges whether the printed work of the rewritten model data is abnormal, discards the printed work and feeds back the printed work to a management center if the printed work is abnormal, and the rewritten 3D printed model data is sent to a blockchain if the printed work is normal.
Description
Technical Field
The invention relates to the technical field of 3D printing data management, in particular to a proving method and system of 3D printing works based on block chains.
Background
The 3D printer is also called as a three-dimensional printer, is called as an additive manufacturing technology, and is a machine utilizing a rapid prototyping technology, and builds a three-dimensional entity by adopting a layer-by-layer printing mode by adopting a prototyping material based on a digital model file. Before printing, the 3D model to be printed is formed by modeling by using computer modeling software, and the built 3D model is partitioned into cross sections layer by layer, namely slices, so that the 3D printer is guided to print layer by layer. The 3D printer is widely applied in the product manufacturing industry, the working principle of the 3D printer is basically the same as that of a traditional printer, the 3D printer consists of a control component, a mechanical component, a printing head, consumable materials (namely forming materials), media and the like, and the printing principle is basically similar.
One existing problem is that with the rapid development and popularization of the 3D printing technology at the present stage, many fake and inferior products are bred while the traditional manufacturing industry is gradually approaching intelligent manufacturing. Counterfeit products in the world can affect the benefits of manufacturers and consumers and even restrict the healthy development of manufacturing industry. Since the advent of 3D printing rapid manufacturing, messages about successful copying of a work by 3D printing have appeared many times around the world. Certain economic losses are caused for the creator, and meanwhile, the creator is also a damage to intellectual property. These too realistic imitations are likely to pose a significant hazard to intellectual property protection.
Thus, if a 3D printed model file is available, it may lead to the possibility of a printed article being imitated by a plagiarism, and therefore, how to protect the 3D printed model file from leakage is a problem that the present invention is intended to solve.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the invention discloses a proving method of 3D printing works based on blockchain, comprising the following steps:
step 1, when a user performs 3D printing, a 3D printing server receives an access request of the user, and the data to be processed in the 3D printing server and a blockchain for certification are in a relation of uplink storage;
step 2, after receiving the access request, the 3D printing server establishes a secure data transmission channel with a client of a user, and the user uploads model data to be subjected to 3D printing through the transmission channel;
step 3, the 3D printing server processes the received model data, adds the digital signature data of the user at the preset slicing position to obtain rewritten model data, and prints according to the rewritten model data;
and 4, after the printing is finished, the 3D printing server evaluates the printed work, judges whether the printed work of the rewritten model data is abnormal, discards the printed work and feeds back the printed work to the management center if the printed work is abnormal, and sends the rewritten 3D printed model data to the blockchain if the printed work is normal.
In an embodiment of the invention, the access request comprises identity information of the user, the identity information of the user comprising an ID of the user and a key.
In an embodiment of the present invention, the 3D-printed model data is one of a plurality of three-dimensional format data such as STL, STP, OBJ.
In an embodiment of the present invention, the establishing a secure data transmission channel with the client of the user further includes: and signing the model data to be subjected to 3D printing by using a private key of a user, then sending the signature and the model data to be subjected to 3D printing, and verifying the received model data to be subjected to 3D printing by using the public key and the signature by a 3D printing server so as to ensure that the received data are safe and untampered data.
In an embodiment of the present invention, the 3D print server evaluates the printed work after finishing printing, and determining whether the printed work of the rewritten model data is abnormal further includes: and respectively printing the rewritten model data and the original model data, comparing the similarity degree of the two printed works through machine vision, judging that the printed works of the rewritten model data are normal when the similarity degree is larger than a preset value, and further transmitting the modified STL file to a blockchain for verification.
The invention also discloses a proving system of the 3D printing works based on the blockchain, which comprises the following steps:
the system comprises a connection establishment module, a 3D printing server and a storage module, wherein the connection establishment module is used for enabling a 3D printing server to receive an access request of a user when the user performs 3D printing, and the relationship between data to be processed in the 3D printing server and a blockchain for storing a certificate is uplink storage;
the system comprises a security transmission module, a 3D printing server, a user and a data processing module, wherein the security transmission module is used for establishing a security data transmission channel with a client of the user after receiving an access request, and the user uploads model data to be subjected to 3D printing through the transmission channel;
the file rewriting module is used for processing the received model data through the 3D printing server, adding digital signature data of a user at a preset slicing position to obtain rewritten model data, and printing according to the rewritten model data;
and the verification and data uploading module is used for evaluating the printed works after the 3D printing server finishes printing, judging whether the printed works of the rewritten model data are abnormal, discarding the printed works and feeding back the printed works to the management center if the printed works are abnormal, and sending the rewritten 3D printed model data to the blockchain if the printed works are normal.
In an embodiment of the invention, the access request includes identity information of the user in the connection establishment module, and the identity information of the user includes an ID and a key of the user.
In an embodiment of the present invention, the 3D printed model data is an STL format file.
In an embodiment of the present invention, the establishing a secure data transmission channel with the client of the user further includes: in the secure transmission module, firstly, a private key of a user is used for signing model data to be subjected to 3D printing, then the signature and the model data to be subjected to 3D printing are sent, and a 3D printing server verifies the received model data to be subjected to 3D printing by adopting the public key and the signature so as to ensure that the received data are secure untampered data.
In an embodiment of the present invention, the 3D print server evaluates the printed work after finishing printing, and determining whether the printed work of the rewritten model data is abnormal further includes: 3D printing is respectively carried out on the rewritten model data and the original model data in the verification and data uploading module, the similarity degree of the two printed works is compared through machine vision, when the similarity degree is larger than a preset value, the printed works of the rewritten model data are judged to be normal, and the modified STL file is further sent to the blockchain for verification.
Compared with the prior art, the invention has the beneficial effects that: in the invention, because the added position of the identity recognition mark is one layer in the printed work, for example, the process is carried out in the middle of the printed work, the appearance is not different from that of the common printed work, identity information in the 3D printed product can not be found if someone does not copy the printed work without permission, and imitation disputes are conveniently solved.
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The invention will be further understood from the following description taken in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. In the figures, like reference numerals designate corresponding parts throughout the different views.
FIG. 1 is a flow chart of a method of proving a blockchain-based 3D printed work of the present invention.
Detailed Description
A method of proving a blockchain-based 3D printed work as shown in fig. 1, the proving method comprising:
step 1, when a user performs 3D printing, a 3D printing server receives an access request of the user, and the data to be processed in the 3D printing server and a blockchain for certification are in a relation of uplink storage;
step 2, after receiving the access request, the 3D printing server establishes a secure data transmission channel with a client of a user, and the user uploads model data to be subjected to 3D printing through the transmission channel;
step 3, the 3D printing server processes the received model data, adds the digital signature data of the user at the preset slicing position to obtain rewritten model data, and prints according to the rewritten model data;
and 4, after the printing is finished, the 3D printing server evaluates the printed work, judges whether the printed work of the rewritten model data is abnormal, discards the printed work and feeds back the printed work to the management center if the printed work is abnormal, and sends the rewritten 3D printed model data to the blockchain if the printed work is normal.
In an embodiment of the invention, the access request comprises identity information of the user, the identity information of the user comprising an ID of the user and a key.
In an embodiment of the present invention, the 3D printed model data is an STL format file.
In an embodiment of the present invention, the establishing a secure data transmission channel with the client of the user further includes: and signing the model data to be subjected to 3D printing by using a private key of a user, then sending the signature and the model data to be subjected to 3D printing, and verifying the received model data to be subjected to 3D printing by using the public key and the signature by a 3D printing server so as to ensure that the received data are safe and untampered data.
In an embodiment of the present invention, the 3D print server evaluates the printed work after finishing printing, and determining whether the printed work of the rewritten model data is abnormal further includes: and respectively printing the rewritten model data and the original model data, comparing the similarity degree of the two printed works through machine vision, judging that the printed works of the rewritten model data are normal when the similarity degree is larger than a preset value, and further transmitting the modified STL file to a blockchain for verification.
The implementation also includes a description from a hardware perspective, and the invention concept is explained from the hardware perspective, namely a proving system of 3D printing works based on block chains is disclosed, and the system comprises:
the system comprises a connection establishment module, a 3D printing server and a storage module, wherein the connection establishment module is used for enabling a 3D printing server to receive an access request of a user when the user performs 3D printing, and the relationship between data to be processed in the 3D printing server and a blockchain for storing a certificate is uplink storage;
the system comprises a security transmission module, a 3D printing server, a user and a data processing module, wherein the security transmission module is used for establishing a security data transmission channel with a client of the user after receiving an access request, and the user uploads model data to be subjected to 3D printing through the transmission channel;
the file rewriting module is used for processing the received model data through the 3D printing server, adding digital signature data of a user at a preset slicing position to obtain rewritten model data, and printing according to the rewritten model data;
and the verification and data uploading module is used for evaluating the printed works after the 3D printing server finishes printing, judging whether the printed works of the rewritten model data are abnormal, discarding the printed works and feeding back the printed works to the management center if the printed works are abnormal, and sending the rewritten 3D printed model data to the blockchain if the printed works are normal.
In an embodiment of the invention, the access request includes identity information of the user in the connection establishment module, and the identity information of the user includes an ID and a key of the user.
In an embodiment of the present invention, the 3D printed model data is an STL format file.
In an embodiment of the present invention, the establishing a secure data transmission channel with the client of the user further includes: in the secure transmission module, firstly, a private key of a user is used for signing model data to be subjected to 3D printing, then the signature and the model data to be subjected to 3D printing are sent, and a 3D printing server verifies the received model data to be subjected to 3D printing by adopting the public key and the signature so as to ensure that the received data are secure untampered data.
In an embodiment of the present invention, the 3D print server evaluates the printed work after finishing printing, and determining whether the printed work of the rewritten model data is abnormal further includes: 3D printing is respectively carried out on the rewritten model data and the original model data in the verification and data uploading module, the similarity degree of the two printed works is compared through machine vision, when the similarity degree is larger than a preset value, the printed works of the rewritten model data are judged to be normal, and the modified STL file is further sent to the blockchain for verification.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
While the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications can be made without departing from the scope of the invention. It is therefore intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that it is the following claims, including all equivalents, that are intended to define the spirit and scope of this invention. The above examples should be understood as illustrative only and not limiting the scope of the invention. Various changes and modifications to the present invention may be made by one skilled in the art after reading the teachings herein, and such equivalent changes and modifications are intended to fall within the scope of the invention as defined in the appended claims.
Claims (8)
1. A method of proving a blockchain-based 3D printed work, the method comprising:
step 1, when a user performs 3D printing, a 3D printing server receives an access request of the user, and the data to be processed in the 3D printing server and a blockchain for certification are in a relation of uplink storage;
step 2, after receiving the access request, the 3D printing server establishes a secure data transmission channel with a client of a user, and the user uploads model data to be subjected to 3D printing through the transmission channel;
step 3, the 3D printing server processes the received model data, adds the digital signature data of the user at the preset slicing position to obtain rewritten model data, and prints according to the rewritten model data;
and 4, after the printing is finished, the 3D printing server evaluates the printed works, judges whether the printed works of the rewritten model data are abnormal, discards the printed works and feeds back the printed works to the management center if the printed works are abnormal, and sends the rewritten 3D printed model data to the blockchain if the printed works are normal, wherein the evaluating the printed works, judging whether the printed works of the rewritten model data are abnormal further comprises printing the rewritten model data and the original model data respectively, comparing the similarity degree of the two printed works through machine vision, and judging that the printed works of the rewritten model data are normal when the similarity is larger than a preset value.
2. The method of claim 1, wherein the access request includes user identity information, the user identity information including a user ID and a key.
3. The method of proving a blockchain-based 3D printed work as in claim 2, wherein the 3D printed model data is an STL format file.
4. The method of proving a blockchain-based 3D printed work as in claim 3, wherein the establishing a secure data transmission channel with the client of the user further comprises: and signing the model data to be subjected to 3D printing by using a private key of a user, then sending the signature and the model data to be subjected to 3D printing, and verifying the received model data to be subjected to 3D printing by using the public key and the signature by a 3D printing server so as to ensure that the received data are safe and untampered data.
5. A system for proving a blockchain-based 3D printed work, the system comprising:
the system comprises a connection establishment module, a 3D printing server and a storage module, wherein the connection establishment module is used for enabling a 3D printing server to receive an access request of a user when the user performs 3D printing, and the relationship between data to be processed in the 3D printing server and a blockchain for storing a certificate is uplink storage;
the system comprises a security transmission module, a 3D printing server, a user and a data processing module, wherein the security transmission module is used for establishing a security data transmission channel with a client of the user after receiving an access request, and the user uploads model data to be subjected to 3D printing through the transmission channel;
the file rewriting module is used for processing the received model data through the 3D printing server, adding digital signature data of a user at a preset slicing position to obtain rewritten model data, and printing according to the rewritten model data;
and the verification and data uploading module is used for evaluating the printed works after the 3D printing server finishes printing, judging whether the printed works of the rewritten model data are abnormal, discarding the printed works and feeding back the printed works to the management center if the printed works are abnormal, and sending the rewritten 3D printed model data to the blockchain if the printed works are normal, wherein the evaluating the printed works, judging whether the printed works of the rewritten model data are abnormal further comprises printing the rewritten model data and the original model data respectively, comparing the similarity degree of the two printed works through machine vision, and judging that the printed works of the rewritten model data are normal when the similarity is larger than a preset value.
6. The system for proving a blockchain-based 3D printed work of claim 5, wherein the access request includes identity information of a user in the connection establishment module, the identity information of the user including an ID of the user and a key.
7. The prover system of blockchain-based 3D printed work of claim 6 wherein the 3D printed model data is one or more of STL, STP, OBJ three-dimensional format data.
8. The blockchain-based 3D printed work certification system of claim 7, wherein the establishing a secure data transmission channel with the user's client further comprises: in the secure transmission module, firstly, a private key of a user is used for signing model data to be subjected to 3D printing, then the signature and the model data to be subjected to 3D printing are sent, and a 3D printing server verifies the received model data to be subjected to 3D printing by adopting the public key and the signature so as to ensure that the received data are secure untampered data.
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| US10063529B2 (en) * | 2016-03-28 | 2018-08-28 | Accenture Global Solutions Limited | Secure 3D model sharing using distributed ledger |
| US11204597B2 (en) * | 2016-05-20 | 2021-12-21 | Moog Inc. | Outer space digital logistics system |
| FR3058856B1 (en) * | 2016-11-14 | 2018-11-16 | 3Dtrust | SYSTEM AND METHOD FOR SECURE TRANSFER AND IDENTIFIED AND TRACABLE USE OF OWN COMPUTER FILE |
| CN112883401B (en) * | 2021-03-12 | 2022-09-06 | 齐鲁工业大学 | Method for making digital identity certification for 3D printed product based on block chain technology |
| CN115302759A (en) * | 2022-08-08 | 2022-11-08 | 西北工业大学 | Additive manufacturing monitoring and regulating method, system and storage medium |
| CN115600163A (en) * | 2022-09-14 | 2023-01-13 | 宁波诺丁汉大学（Cn） | 3D printing digital model authentication method and system based on block chain |
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