CN112348535A - Traceability application method and system based on block chain technology - Google Patents
Traceability application method and system based on block chain technology Download PDFInfo
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- G06F16/90—Details of database functions independent of the retrieved data types
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Abstract
The invention discloses a traceability application method and a traceability application system based on a block chain technology, wherein the traceability application method comprises the following steps: obtaining traceability information of products corresponding to a preset number of product terminals, storing the preset number of traceability information into a preset number of traceability information files in a block chain database, determining the association degree of each first traceability information file and the rest of second traceability information files, associating target second traceability information files of which the association degree with the first traceability information files is more than or equal to a preset threshold value, generating traceability labels for the first traceability information files, uploading the traceability labels into N preset proxy servers, obtaining preset signature traceability labels of the N preset proxy servers, receiving a scanning instruction sent by the current proxy server, providing the target traceability labels of the target products to the current proxy server, determining whether to transmit the target traceability information files of the target products according to the scanning result, and avoiding the requirement of scanning and inquiring the traceability information of each product by a user, the working efficiency is improved.
Description
Technical Field
The invention relates to the technical field of block chains, in particular to a traceability application method and a traceability application system based on a block chain technology.
Background
At present, with the rapid development of social economy and the continuous improvement of the quality of the living standard of people, the safety problem of commodities arouses the wide attention of society, so that various production merchants print and print traceability information two-dimensional codes of the commodities on packaging surfaces when packaging the commodities so as to enable consumers to know the traceability information of the commodities at any time, but the method is utilized by various hackers or lawless persons, the hackers and the lawless persons tamper on webpages of the commodities so as to enable the traceability information of the commodities to be seriously inconsistent with original information, so that the clearance between the consumers and the production merchants is larger and larger, and then, the storage and the calling of the traceability information are realized by utilizing a block chain technology in the prior art, the lawless persons cannot crack and modify due to the tightness and ultrahigh safety, the safety and the accuracy of the traceability information of the commodities are greatly improved, however, this method has the following disadvantages: because the server is connected with the blockchain client and each product has a respective traceability label, if a consumer purchases a large number of products of the same category at one time, the traceability labels of each product need to be scanned for security verification, thereby greatly consuming the time of the consumer and seriously influencing the experience of the consumer.
Disclosure of Invention
In view of the above-mentioned problems, the present invention provides a traceability application method and system based on a blockchain technology, so as to solve the problems mentioned in the background art that since a server is connected to a blockchain client and each product has a respective traceability tag, if a consumer purchases a large number of products of the same category at one time, the traceability tags of each product need to be scanned for security verification, thereby greatly consuming the time of the consumer and seriously affecting the experience of the consumer.
A tracing application method based on a block chain technology comprises the following steps:
obtaining traceability information of products corresponding to a preset number of product terminals, storing the preset number of traceability information into a preset number of traceability information files in a block chain database, and determining the association degree of each first traceability information file and the rest second traceability information files;
associating the target second traceability information file with the first traceability information file, wherein the association degree of the target second traceability information file is greater than or equal to a preset threshold value;
generating a traceability label for the first traceability information file;
uploading the traceability tags to N preset proxy servers to obtain preset signature traceability tags of the N preset proxy servers;
receiving a scanning instruction sent by a current proxy server, providing a target traceability label of a target product to the current proxy server, and determining whether to transmit a target traceability information file of the target product according to a scanning result of the current proxy server.
Preferably, the obtaining of the traceability information of the products corresponding to the preset number of product terminals, storing the preset number of traceability information in the preset number of traceability information files in the block chain database, and determining the association degree between each first traceability information file and the rest of second traceability information files includes:
detecting terminal identifications of the preset number of product terminals and a connection base station;
acquiring a delivery parameter, a manufacturing parameter and an identification parameter of each product, wherein the delivery parameter comprises a product origin, the manufacturing parameter comprises a product production batch and a production date, and the identification parameter comprises a product composition and a product picture;
taking the delivery parameters, the manufacturing parameters and the identification parameters of each product as initial traceability information of each product, adding a terminal identification and a connection base station of a product terminal corresponding to each product into the initial traceability information of each product, and obtaining final traceability information of each product;
storing a preset number of final tracing information into a preset number of tracing information files in a block chain database;
comparing the delivery parameters, the manufacturing parameters and the identification parameters in each traceability information file, the terminal identification of the product terminal to which the traceability information file belongs and the connection base station to obtain the similarity between each first traceability information file and the rest second traceability information files;
and determining the association degree of each first traceability information file and the rest second traceability information files according to a preset similarity association degree conversion algorithm.
Preferably, the associating the target second traceability information file with the first traceability information file with the degree of association being greater than or equal to a preset threshold value includes;
extracting a first keyword in the first tracing information file and a second keyword in a target second tracing information file;
determining a common keyword of the first keyword and the second keyword which are the same;
establishing an initial network model, inputting the common keywords into the initial network model, and establishing data nodes for each common keyword;
and connecting the data nodes of each common keyword.
Preferably, the traceability label comprises one or more of a two-dimensional code label or a bar code label.
Preferably, the uploading the traceability label to N preset proxy servers to obtain the traceability labels of the preset signatures of the N preset proxy servers includes:
acquiring network addresses of N preset proxy servers;
carrying out security verification on the N network addresses, and setting a key of a connection block link database for each preset proxy server after the verification is passed;
after the setting is finished, connecting the block chain database with the network connection of N preset proxy servers;
uploading the traceability tags to N preset proxy servers for the N preset proxy servers to perform system entry of traceability tags;
and after the input is finished, receiving the preset signature traceability labels fed back by the N preset proxy servers.
Preferably, the method comprises the steps of receiving a scanning instruction sent by a current proxy server, providing a target traceability label of a target product to the current proxy server, and determining whether to transmit a target traceability information file of the target product according to a scanning result of the current proxy server;
analyzing the scanning instruction to determine a target product;
searching whether the target product has a traceability information file in the block chain database, if so, acquiring a target traceability label corresponding to the target traceability file, otherwise, sending a prompt that the target product has no traceability information to the current proxy server;
transmitting the target tracing label to the current proxy server for scanning, detecting whether the current proxy server feeds back the current signature tracing label, if so, transmitting a target tracing information file of a target product to the current proxy server, otherwise, confirming that the current proxy server is invalid, and verifying a current connection key of the current proxy server;
and when the current connection key passes the verification, transmitting the target traceability information file to the current proxy server, and when the current connection key fails the verification for three times, disconnecting the network connection state with the current proxy server.
Preferably, the method further comprises:
subsequently obtaining the source tracing update information of the products corresponding to the preset number of product terminals;
and storing the traceability updating information into a traceability information file corresponding to each product.
Preferably, the verifying the current connection key of the current proxy server includes:
acquiring a target tracing file of the target product, analyzing the target tracing file, and acquiring a target keyword in the target tracing file;
determining a target data node corresponding to the target keyword, determining whether the current proxy server is a common connection proxy server according to a historical connection record of the target node, if so, determining that the current proxy server is safe in connection, and acquiring a current connection key provided by the current proxy server for verification, otherwise, determining that the current proxy server is unsafe;
when the current proxy server is determined to be unsafe, acquiring a current connection key provided by the current proxy server and signature information of the current proxy server;
and verifying the current connection key, storing the signature information of the current proxy server after the verification is passed, and marking the current proxy server as a safe proxy server.
Preferably, the determining the association degree between each first traceability information file and the rest of the second traceability information files comprises:
extracting a first keyword in the first traceability information file and a second keyword in the second traceability information file;
calculating an importance coefficient of each of the first keywords:
wherein k isiExpressed as the importance coefficient of the ith first keyword, M is expressed as the number of first keywords, SiThe frequency of the ith first keyword appearing in the first traceability information file is represented as [0.1,0.3 ]]Ln is expressed as a natural logarithm, QiThe text length is expressed as the ith first keyword, theta is expressed as the number of times of the ith first keyword appearing in the first traceability information file, L is expressed as the total text length of the first traceability information file, beta is expressed as the influence factor of the remaining first keyword on the calculation importance coefficient of the ith first keyword, and the value is 0.3;
removing a first number of third keywords with the importance coefficients smaller than a preset threshold value from the first keywords, and remaining a second number of fourth keywords;
calculating the association degree of the first traceability information file and the rest of second traceability information files according to the second quantity of fourth keywords:
wherein, a is expressed as a first tracing information file, b is expressed as a second tracing information file, UbThe number of the second keywords expressed as the b-th second traceability information file, P is the number of the fourth keywords, TabExpressed as the number of keywords, ω, identical in the second keyword and the fourth keywordaExpressed as the weight, ω, of the same keyword among a second number of fourth keywordsbThe weight, G, of the same keyword in the second keyword of the b-th second tracing information fileabThe relevance degree of the first traceability information file and the b second traceability information file is represented;
and arranging the association degrees of the first traceability information file and the rest second traceability information files in a descending order.
A traceability application system based on a block chain technology comprises:
the system comprises a first acquisition module, a block chain database and a second acquisition module, wherein the first acquisition module is used for acquiring the traceability information of products corresponding to a preset number of product terminals, storing the preset number of traceability information into a preset number of traceability information files in the block chain database, and determining the association degree of each first traceability information file and the rest second traceability information files;
the association module is used for associating the target second traceability information file with the first traceability information file, wherein the association degree of the target second traceability information file is greater than or equal to a preset threshold;
the generating module is used for generating a traceability label for the first traceability information file;
the second acquisition module is used for uploading the traceability tags to N preset proxy servers and acquiring the preset signature traceability tags of the N preset proxy servers;
and the determining module is used for receiving a scanning instruction sent by the current proxy server, providing a target traceability label of the target product for the current proxy server, and determining whether to transmit a target traceability information file of the target product according to a scanning result of the current proxy server.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a flowchart of a tracing application method based on a block chain technique according to the present invention;
FIG. 2 is another flowchart of the tracing application method based on the blockchain technique according to the present invention;
FIG. 3 is a flowchart of another exemplary embodiment of a tracing application method based on a blockchain technique according to the present invention;
fig. 4 is a schematic structural diagram of a tracing application system based on the blockchain technique according to the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
At present, with the rapid development of social economy and the continuous improvement of the quality of the living standard of people, the safety problem of commodities arouses the wide attention of society, so that various production merchants print and print traceability information two-dimensional codes of the commodities on packaging surfaces when packaging the commodities so as to enable consumers to know the traceability information of the commodities at any time, but the method is utilized by various hackers or lawless persons, the hackers and the lawless persons tamper on webpages of the commodities so as to enable the traceability information of the commodities to be seriously inconsistent with original information, so that the clearance between the consumers and the production merchants is larger and larger, and then, the storage and the calling of the traceability information are realized by utilizing a block chain technology in the prior art, the lawless persons cannot crack and modify due to the tightness and ultrahigh safety, the safety and the accuracy of the traceability information of the commodities are greatly improved, however, this method has the following disadvantages: because the server is connected with the blockchain client and each product has a respective traceability label, if a consumer purchases a large number of products of the same category at one time, the traceability labels of each product need to be scanned for security verification, thereby greatly consuming the time of the consumer and seriously influencing the experience of the consumer. In order to solve the above problem, the present embodiment discloses a tracing application method based on a block chain technology.
A tracing application method based on the blockchain technology, as shown in fig. 1, includes the following steps:
step S101, obtaining traceability information of products corresponding to a preset number of product terminals, storing the preset number of traceability information into a preset number of traceability information files in a block chain database, and determining the association degree of each first traceability information file and the rest second traceability information files;
step S102, associating a target second traceability information file with the first traceability information file, wherein the association degree of the target second traceability information file is greater than or equal to a preset threshold value;
step S103, generating a traceability label for the first traceability information file;
step S104, uploading the traceability tags to N preset proxy servers, and acquiring the preset signature traceability tags of the N preset proxy servers;
step S105, receiving a scanning instruction sent by the current proxy server, providing a target traceability label of the target product to the current proxy server, and determining whether to transmit a target traceability information file of the target product according to a scanning result of the current proxy server;
in this embodiment, the consumer only needs to scan the traceability label of the first traceability information file to know the traceability information of the target product and know the traceability information of other products.
The working principle of the technical scheme is as follows: the method comprises the steps of obtaining traceability information of products corresponding to a preset number of product terminals, storing the preset number of traceability information into a preset number of traceability information files in a block chain database, determining the association degree of each first traceability information file and other second traceability information files, associating target second traceability information files with the association degree of the first traceability information files being larger than or equal to a preset threshold value, generating traceability labels for the first traceability information files, uploading the traceability labels into N preset proxy servers, obtaining preset signature traceability labels of the N preset proxy servers, receiving a scanning instruction sent by the current proxy server, providing the target traceability labels of target products for the current proxy server, and determining whether to transmit the target traceability information files of the target products according to the scanning result of the current proxy server.
The beneficial effects of the above technical scheme are: by determining the relevance of the traceability information corresponding to each product, when one product is produced to the traceability label, a user scans the traceability label to correlate the traceability information of other related products, the user does not need to scan and inquire the traceability information of each product, the working efficiency is improved, the problem that in the prior art, a server is connected with a block chain client, each product has a respective traceability label, if a consumer purchases a large number of products of the same type at one time, the traceability label of each product needs to be scanned to carry out security verification, the time of the consumer is greatly consumed is solved, the experience of the user is improved, meanwhile, the storage and calling of the traceability information by using a regional chain database also ensure the security of the data, and the situations that lawless persons modify or copy the traceability information and the like are avoided, furthermore, the safety of the tracing information of the product is further ensured by limiting the proxy server, virus invasion and the like to the regional chain database caused by calling the tracing information by the high-risk vulnerability server are avoided, and the safety is improved.
In one embodiment, the obtaining of the tracing information of the products corresponding to the preset number of product terminals, storing the preset number of tracing information into the preset number of tracing information files in the block chain database, and determining the association degree between each first tracing information file and the other second tracing information files includes:
detecting terminal identifications of the preset number of product terminals and a connection base station;
acquiring a delivery parameter, a manufacturing parameter and an identification parameter of each product, wherein the delivery parameter comprises a product origin, the manufacturing parameter comprises a product production batch and a production date, and the identification parameter comprises a product composition and a product picture;
taking the delivery parameters, the manufacturing parameters and the identification parameters of each product as initial traceability information of each product, adding a terminal identification and a connection base station of a product terminal corresponding to each product into the initial traceability information of each product, and obtaining final traceability information of each product;
storing a preset number of final tracing information into a preset number of tracing information files in a block chain database;
comparing the delivery parameters, the manufacturing parameters and the identification parameters in each traceability information file, the terminal identification of the product terminal to which the traceability information file belongs and the connection base station to obtain the similarity between each first traceability information file and the rest second traceability information files;
and determining the association degree of each first traceability information file and the rest second traceability information files according to a preset similarity association degree conversion algorithm.
The beneficial effects of the above technical scheme are: the terminal identification of the product terminal corresponding to each product, the connection base station and the self parameters of each product are jointly formed into the traceability information, so that consumers or more traceability information about the product can be enabled, the quality and the reliability of the product can be further ensured, meanwhile, the relevance between each traceability information file is obtained by utilizing the preset similarity relevance conversion algorithm, compared with the situation that the final result is determined by directly utilizing the similarity, the fault tolerance rate is improved, and the accuracy of the relevance between each traceability information file is ensured.
In an embodiment, as shown in fig. 2, the associating the target second traceability information file with the first traceability information file association degree being greater than or equal to a preset threshold includes;
step S201, extracting a first keyword in the first traceability information file and a second keyword in a target second traceability information file;
step S202, determining a common keyword of which the first keyword is the same as the second keyword;
step S203, constructing an initial network model, inputting the common keywords into the initial network model, and constructing data nodes for each common keyword;
and step S204, connecting the data nodes of each common keyword.
The beneficial effects of the above technical scheme are: the first traceability file information and the second traceability file information are associated by constructing a network model and further constructing nodes of common keywords, so that a user can quickly inquire the second traceability file related to the first traceability file when scanning the traceability label corresponding to the first traceability file, and the stability is improved.
In one embodiment, the traceability label comprises one or more of a two-dimensional code label or a bar code label.
In an embodiment, as shown in fig. 3, the uploading the traceability tag to N preset proxy servers to obtain the traceability tags of the preset signatures of the N preset proxy servers includes:
s301, acquiring network addresses of N preset proxy servers;
step S302, carrying out security verification on the N network addresses, and setting a key of a connection block link database for each preset proxy server after the verification is passed;
step S303, after the setting is finished, connecting the block chain database with the network connection of N preset proxy servers;
step S304, uploading the traceability label to N preset proxy servers for the system entry of the traceability label by the N preset proxy servers;
and step S305, after the recording is finished, receiving the preset signature traceability labels fed back by the N preset proxy servers.
The beneficial effects of the above technical scheme are: the safety of the network connection of the preset proxy server and the regional chain database can be ensured by verifying the safety of the network address of each preset proxy server, the damage of viruses to files in the regional chain database is further avoided, the safety is improved, meanwhile, the safety login of the proxy server can be verified by setting a connection key for each preset proxy server, the safety of the files in the database is further ensured, further, the tracing labels of the products can be accurately known by the proxy server through receiving the tracing labels of the preset signatures fed back by the N preset proxy servers, and then the tracing information of the products can be quickly called subsequently.
In one embodiment, a scanning instruction sent by a current proxy server is received, a target traceability label of a target product is provided for the current proxy server, and whether a target traceability information file of the target product is transmitted or not is determined according to a scanning result of the current proxy server;
analyzing the scanning instruction to determine a target product;
searching whether the target product has a traceability information file in the block chain database, if so, acquiring a target traceability label corresponding to the target traceability file, otherwise, sending a prompt that the target product has no traceability information to the current proxy server;
transmitting the target tracing label to the current proxy server for scanning, detecting whether the current proxy server feeds back the current signature tracing label, if so, transmitting a target tracing information file of a target product to the current proxy server, otherwise, confirming that the current proxy server is invalid, and verifying a current connection key of the current proxy server;
and when the current connection key passes the verification, transmitting the target traceability information file to the current proxy server, and when the current connection key fails the verification for three times, disconnecting the network connection state with the current proxy server.
The beneficial effects of the above technical scheme are: the identity safety of the current proxy server can be ensured by carrying out key verification on the current proxy server, when the key passes the verification, the target traceability information file is transmitted to the current proxy server, and when the key fails the verification for three times, the network connection with the current proxy server is disconnected, so that the connection state with the current proxy server can be automatically realized according to the actual condition, the intellectualization is realized, and the safety of data in a database is further ensured.
In one embodiment, the method further comprises:
subsequently obtaining the source tracing update information of the products corresponding to the preset number of product terminals;
and storing the traceability updating information into a traceability information file corresponding to each product.
The beneficial effects of the above technical scheme are: the user can know the latest traceability information about the product at any time by updating the traceability information of each product, the authenticity of data is ensured, and the experience of the consumer is further improved.
In one embodiment, said verifying the current connection key of the current proxy server comprises:
acquiring a target tracing file of the target product, analyzing the target tracing file, and acquiring a target keyword in the target tracing file;
determining a target data node corresponding to the target keyword, determining whether the current proxy server is a common connection proxy server according to a historical connection record of the target node, if so, determining that the current proxy server is safe in connection, and acquiring a current connection key provided by the current proxy server for verification, otherwise, determining that the current proxy server is unsafe;
when the current proxy server is determined to be unsafe, acquiring a current connection key provided by the current proxy server and signature information of the current proxy server;
and verifying the current connection key, storing the signature information of the current proxy server after the verification is passed, and marking the current proxy server as a safe proxy server.
The beneficial effects of the above technical scheme are: the safety condition of the current proxy server is preliminarily judged by judging whether the current proxy server is a commonly-used connection proxy server, so that the monitoring of the proxy server can be realized, and the safety of data in a database is further ensured. Further, marking the current proxy server as a secure proxy server by obtaining signature information of the current proxy server may determine the security of the current proxy server from external factors of the signature information and internal factors of the current proxy server itself. And further, the security verification of each proxy server can be effectively realized, and the security is further improved.
In one embodiment, the determining the association degree of each first traceability information file with the rest of the second traceability information files comprises:
extracting a first keyword in the first traceability information file and a second keyword in the second traceability information file;
calculating an importance coefficient of each of the first keywords:
wherein k isiExpressed as the importance coefficient of the ith first keyword, M is expressed as the number of first keywords, SiThe frequency of the ith first keyword appearing in the first traceability information file is represented as [0.1,0.3 ]]Ln is expressed as a natural logarithm, QiThe text length is expressed as the ith first keyword, theta is expressed as the number of times of the ith first keyword appearing in the first traceability information file, L is expressed as the total text length of the first traceability information file, beta is expressed as the influence factor of the remaining first keyword on the calculation importance coefficient of the ith first keyword, and the value is 0.3;
removing a first number of third keywords with the importance coefficients smaller than a preset threshold value from the first keywords, and remaining a second number of fourth keywords;
calculating the association degree of the first traceability information file and the rest of second traceability information files according to the second quantity of fourth keywords:
wherein, a is expressed as a first tracing information file, b is expressed as a second tracing information file, UbThe number of the second keywords is expressed as the number of the second traceability information files of the b-th, and P is expressed as the number of the second keywordsNumber of four keywords, TabExpressed as the number of keywords, ω, identical in the second keyword and the fourth keywordaExpressed as the weight, ω, of the same keyword among a second number of fourth keywordsbThe weight, G, of the same keyword in the second keyword of the b-th second tracing information fileabThe relevance degree of the first traceability information file and the b second traceability information file is represented;
and arranging the association degrees of the first traceability information file and the rest second traceability information files in a descending order.
The beneficial effects of the above technical scheme are: the useless keywords are eliminated by calculating the important coefficient of each first keyword in the first traceability information file, the calculation amount can be reduced for the calculation of the subsequent association degree, meanwhile, the influence of the useless keywords on the calculation result is also eliminated, the accuracy of the calculation result is improved, further, the second traceability file can be associated with the first traceability information file by calculating the association degree of the first traceability information file and each second traceability information file, the user can browse the second traceability information file while browsing the first traceability information file, and the experience of the user is further improved.
In this embodiment, a tracing application system based on the blockchain technology is further provided, as shown in fig. 4, the system includes:
the system comprises a first acquisition module, a block chain database and a second acquisition module, wherein the first acquisition module is used for acquiring the traceability information of products corresponding to a preset number of product terminals, storing the preset number of traceability information into a preset number of traceability information files in the block chain database, and determining the association degree of each first traceability information file and the rest second traceability information files;
the association module is used for associating the target second traceability information file with the first traceability information file, wherein the association degree of the target second traceability information file is greater than or equal to a preset threshold;
the generating module is used for generating a traceability label for the first traceability information file;
the second acquisition module is used for uploading the traceability tags to N preset proxy servers and acquiring the preset signature traceability tags of the N preset proxy servers;
and the determining module is used for receiving a scanning instruction sent by the current proxy server, providing a target traceability label of the target product for the current proxy server, and determining whether to transmit a target traceability information file of the target product according to a scanning result of the current proxy server.
The working principle and the advantageous effects of the above technical solution have been explained in the method claims, and are not described herein again.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. A tracing application method based on block chain technology is characterized by comprising the following steps:
obtaining traceability information of products corresponding to a preset number of product terminals, storing the preset number of traceability information into a preset number of traceability information files in a block chain database, and determining the association degree of each first traceability information file and the rest second traceability information files;
associating the target second traceability information file with the first traceability information file, wherein the association degree of the target second traceability information file is greater than or equal to a preset threshold value;
generating a traceability label for the first traceability information file;
uploading the traceability tags to N preset proxy servers to obtain preset signature traceability tags of the N preset proxy servers;
receiving a scanning instruction sent by a current proxy server, providing a target traceability label of a target product to the current proxy server, and determining whether to transmit a target traceability information file of the target product according to a scanning result of the current proxy server.
2. The method for tracing to the source based on the blockchain technology according to claim 1, wherein the obtaining of the tracing information of the products corresponding to the predetermined number of product terminals, the storing of the predetermined number of tracing information into the predetermined number of tracing information files in the blockchain database, and the determining of the association degree between each first tracing information file and the other second tracing information files comprises:
detecting terminal identifications of the preset number of product terminals and a connection base station;
acquiring a delivery parameter, a manufacturing parameter and an identification parameter of each product, wherein the delivery parameter comprises a product origin, the manufacturing parameter comprises a product production batch and a production date, and the identification parameter comprises a product composition and a product picture;
taking the delivery parameters, the manufacturing parameters and the identification parameters of each product as initial traceability information of each product, adding a terminal identification and a connection base station of a product terminal corresponding to each product into the initial traceability information of each product, and obtaining final traceability information of each product;
storing a preset number of final tracing information into a preset number of tracing information files in a block chain database;
comparing the delivery parameters, the manufacturing parameters and the identification parameters in each traceability information file, the terminal identification of the product terminal to which the traceability information file belongs and the connection base station to obtain the similarity between each first traceability information file and the rest second traceability information files;
and determining the association degree of each first traceability information file and the rest second traceability information files according to a preset similarity association degree conversion algorithm.
3. The method for applying traceability based on blockchain technology of claim 1, wherein associating the target second traceability information file with the first traceability information file with an association degree greater than or equal to a preset threshold comprises;
extracting a first keyword in the first tracing information file and a second keyword in a target second tracing information file;
determining a common keyword of the first keyword and the second keyword which are the same;
establishing an initial network model, inputting the common keywords into the initial network model, and establishing data nodes for each common keyword;
and connecting the data nodes of each common keyword.
4. The method as claimed in claim 1, wherein the traceability application program comprises one or more of a two-dimensional code label and a barcode label.
5. The method for tracing to the source based on the blockchain technology according to claim 1, wherein the uploading the tracing label to N preset proxy servers to obtain the preset signature tracing label of the N preset proxy servers includes:
acquiring network addresses of N preset proxy servers;
carrying out security verification on the N network addresses, and setting a key of a connection block link database for each preset proxy server after the verification is passed;
after the setting is finished, connecting the block chain database with the network connection of N preset proxy servers;
uploading the traceability tags to N preset proxy servers for the N preset proxy servers to perform system entry of traceability tags;
and after the input is finished, receiving the preset signature traceability labels fed back by the N preset proxy servers.
6. The traceability application method based on the blockchain technology as claimed in claim 3, wherein a scanning instruction sent by a current proxy server is received, a target traceability tag of a target product is provided to the current proxy server, and whether a target traceability information file of the target product is transmitted or not is determined according to a scanning result of the current proxy server, including;
analyzing the scanning instruction to determine a target product;
searching whether the target product has a traceability information file in the block chain database, if so, acquiring a target traceability label corresponding to the target traceability file, otherwise, sending a prompt that the target product has no traceability information to the current proxy server;
transmitting the target tracing label to the current proxy server for scanning, detecting whether the current proxy server feeds back the current signature tracing label, if so, transmitting a target tracing information file of a target product to the current proxy server, otherwise, confirming that the current proxy server is invalid, and verifying a current connection key of the current proxy server;
and when the current connection key passes the verification, transmitting the target traceability information file to the current proxy server, and when the current connection key fails the verification for three times, disconnecting the network connection state with the current proxy server.
7. The method for source-tracing application based on blockchain technology of claim 1, wherein the method further comprises:
subsequently obtaining the source tracing update information of the products corresponding to the preset number of product terminals;
and storing the traceability updating information into a traceability information file corresponding to each product.
8. The method as claimed in claim 6, wherein the verifying the current connection key of the current proxy server comprises:
acquiring a target tracing file of the target product, analyzing the target tracing file, and acquiring a target keyword in the target tracing file;
determining a target data node corresponding to the target keyword, determining whether the current proxy server is a common connection proxy server according to a historical connection record of the target node, if so, determining that the current proxy server is safe in connection, and acquiring a current connection key provided by the current proxy server for verification, otherwise, determining that the current proxy server is unsafe;
when the current proxy server is determined to be unsafe, acquiring a current connection key provided by the current proxy server and signature information of the current proxy server;
and verifying the current connection key, storing the signature information of the current proxy server after the verification is passed, and marking the current proxy server as a safe proxy server.
9. The method for tracing application based on blockchain technology according to claim 1, wherein said determining the association degree between each first tracing information file and the remaining second tracing information files comprises:
extracting a first keyword in the first traceability information file and a second keyword in the second traceability information file;
calculating an importance coefficient of each of the first keywords:
wherein k isiExpressed as the importance coefficient of the ith first keyword, M is expressed as the number of first keywords, SiThe frequency of the ith first keyword appearing in the first traceability information file is represented as [0.1,0.3 ]]Ln is expressed as a natural logarithm, QiThe length of the text is expressed as the ith first keyword, and theta is expressed as the ithThe number of times that i first keywords appear in the first traceability information file, L represents the total text length of the first traceability information file, and beta represents an influence factor of the remaining first keywords on the calculation importance coefficient of the ith first keyword, and the value is 0.3;
removing a first number of third keywords with the importance coefficients smaller than a preset threshold value from the first keywords, and remaining a second number of fourth keywords;
calculating the association degree of the first traceability information file and the rest of second traceability information files according to the second quantity of fourth keywords:
wherein, a is expressed as a first tracing information file, b is expressed as a second tracing information file, UbThe number of the second keywords expressed as the b-th second traceability information file, P is the number of the fourth keywords, TabExpressed as the number of keywords, ω, identical in the second keyword and the fourth keywordaExpressed as the weight, ω, of the same keyword among a second number of fourth keywordsbThe weight, G, of the same keyword in the second keyword of the b-th second tracing information fileabThe relevance degree of the first traceability information file and the b second traceability information file is represented;
and arranging the association degrees of the first traceability information file and the rest second traceability information files in a descending order.
10. A traceability application system based on a block chain technology is characterized in that the system comprises:
the system comprises a first acquisition module, a block chain database and a second acquisition module, wherein the first acquisition module is used for acquiring the traceability information of products corresponding to a preset number of product terminals, storing the preset number of traceability information into a preset number of traceability information files in the block chain database, and determining the association degree of each first traceability information file and the rest second traceability information files;
the association module is used for associating the target second traceability information file with the first traceability information file, wherein the association degree of the target second traceability information file is greater than or equal to a preset threshold;
the generating module is used for generating a traceability label for the first traceability information file;
the second acquisition module is used for uploading the traceability tags to N preset proxy servers and acquiring the preset signature traceability tags of the N preset proxy servers;
and the determining module is used for receiving a scanning instruction sent by the current proxy server, providing a target traceability label of the target product for the current proxy server, and determining whether to transmit a target traceability information file of the target product according to a scanning result of the current proxy server.
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