CN112488634A - Logistics tracking method based on block chain - Google Patents

Logistics tracking method based on block chain Download PDF

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Publication number
CN112488634A
CN112488634A CN202011501823.4A CN202011501823A CN112488634A CN 112488634 A CN112488634 A CN 112488634A CN 202011501823 A CN202011501823 A CN 202011501823A CN 112488634 A CN112488634 A CN 112488634A
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Prior art keywords
node
package
information
logistics
block chain
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CN202011501823.4A
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Chinese (zh)
Inventor
吴雪瑾
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Suzhou Industrial Park Hanggang Logistics Co ltd
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Suzhou Industrial Park Hanggang Logistics Co ltd
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Priority to CN202011501823.4A priority Critical patent/CN112488634A/en
Publication of CN112488634A publication Critical patent/CN112488634A/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/08—Logistics, e.g. warehousing, loading or distribution; Inventory or stock management
    • G06Q10/083—Shipping
    • G06Q10/0833—Tracking
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/27—Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q30/00—Commerce
    • G06Q30/018—Certifying business or products
    • G06Q30/0185—Product, service or business identity fraud
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/083—Network architectures or network communication protocols for network security for authentication of entities using passwords

Abstract

The invention discloses a logistics tracking method based on a block chain, which comprises the following steps: the user sending node uploads package information to the host node; the main node generates a digital fingerprint according to package information uploaded by a user sending node, the digital fingerprint and a corresponding timestamp are written into a block chain, the block chain is broadcasted in all the slave nodes, each logistics node sequentially generates package state information according to the digital fingerprint and node information of the logistics node and a corresponding next logistics node according to a physical space transmission path of a package, the package state information is written into the block chain by the main node, and a corresponding user receiving node signs for receiving the package and forms package signing information to be uploaded to the main node to be written into the block chain. The method applies the block chain technology to the logistics field, and ensures the authenticity and the traceability of the state of the logistics information by utilizing the characteristic that the block chain cannot be tampered; according to the characteristics of the private chain, the rapid and efficient logistics information storage and state information updating can be realized, and the requirement of logistics instantaneity is met.

Description

Logistics tracking method based on block chain
Technical Field
The invention relates to the technical field of information security, in particular to a logistics tracking method based on a block chain.
Background
With the rapid development of electronic commerce and the increasing trend of economic globalization, the logistics industry is transforming from traditional logistics to modern logistics and becoming the inevitable trend of the current logistics development. The 'internet + express delivery' releases huge vitality, and express delivery enterprises and overseas e-business enterprises deeply cooperate with each other, so that the business volume is in a high-speed increasing situation. According to the latest statistics of the national post and government offices, the total amount of national express delivery business in one quarter of 2016 is accumulated to be 57.7 hundred million, and 4 express deliveries per month are calculated according to the sixth census data. The service quality of the express enterprises in the whole country is inspected at all times by the huge express, and the service quality is the core competitiveness of the express enterprises. It can be known from express complaint statistics of the national post and government offices that the main problems of express service are package delay, loss and damage and poor delivery service.
Double 11 purchases in 2015, the heaven cat refreshes the records with 912.17 hundred million trade amount, and the single amount in the kyoto exceeds the sum of the single amounts in the past five-year double eleven period. According to the star map data message, the sale amount of the whole network is 1229.4 hundred million 24 hours on 11 th and 11 th days in 2015, the number of packages generated is 6.8 hundred million, and the sale amount of the mobile phone accounts for 7.5 percent of the whole network. The development of the mobile internet and the progress of payment means greatly promote the unprecedented explosion of the e-commerce industry. Meanwhile, the logistics industry bears the pressure of 6.8 hundred million package delivery while enjoying the service growth pleasure brought by the enthusiasm of the e-commerce, and distribution stations for many logistics express delivery bear more than the usual delivery amount which is more than multiple times, so that the event of packet loss caused by bin explosion frequently occurs. Most of packages are directly sent to customers by e-commerce enterprises through logistics express delivery, and most of the customers worry that private information is leaked and can be sold by bad enterprises, so that the real-name system innovation of the logistics industry is difficult to implement.
Besides the problems of packet loss and bin explosion, wrong reception and wrong reception, information leakage and the like, most logistics enterprises also bear unpredictable accidents. For example, 11/12/2015, a logistics vehicle in Jiangxi starts a fire during transportation, and more than 4000 packages are burned; the goods van of southwestern schchang in 11/2015 generates side turning, which causes damage to part of the package. Although most logistics companies promise damaged packages to be compensated for in an accident, the traceability and implementation of the involved information is difficult.
Therefore, the problems such as delayed packet loss due to burst, mistaken acquisition, difficult tracking of package information, private information leakage and the like caused by the sharp increase of the traffic become problems to be solved urgently in the logistics industry, and the service quality and the competitive capacity of the logistics industry are directly related. In addition, express delivery distributors evade assessment by forging signatures, and improvement is urgently needed to reduce user complaints, which is an important ring for improving service quality.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a logistics tracking method based on a block chain technology, which effectively ensures the traceability of logistics information by utilizing the characteristic that a block chain cannot be tampered, avoids the problems of packet loss due to warehouse burst, wrong collar and wrong collar, forged signature and the like, and also can effectively promote the implementation of a logistics real-name system.
A logistics tracking method based on block chain is applied to a logistics information network system with a main node maintaining the block chain and a plurality of slave nodes, wherein the slave nodes comprise a user sending node, a logistics node and a user receiving node; the logistics tracking method comprises the following steps:
the user sending node uploads package information to the host node;
the main node generates a digital fingerprint according to the package information uploaded by the user mail node, writes the generated digital fingerprint into a block chain together with a corresponding timestamp (which is the time for generating the digital fingerprint), and broadcasts the block chain in all the slave nodes;
each logistics node generates package state information according to the digital fingerprint and node information of the logistics node and a next logistics node corresponding to the logistics node in sequence according to a physical space transmission path of the package, and the package state information is written into a block chain by a main node;
and the corresponding user receiving node signs the package and forms package signing information to be uploaded to the main node to be written into the block chain.
The logistics information network is established based on identity authentication, and when logistics tracking is actually carried out, the logistics information network is established by adopting an identity authentication mechanism.
When the logistics information network is established based on identity authentication, the slave node waiting to be added sends an identity authentication request to the master node, the master node receives the identity authentication request and then performs identity authentication, and if the identity authentication is passed, the slave node is added into the logistics information network.
Usually, an authentication request sent by a slave node carries identity information (i.e. registration information) of the slave node, and after authentication, the master node writes the identity information of the slave node into a block chain for node validity check.
The logistics node comprises slave nodes which respectively correspond to all addressees, distribution points (namely logistics distribution points), transfer stations and dispatchers of express companies.
Before the system is on line, the trusted server checks the identities of all addressees, websites, transfer stations and dispatchers of the express company, adds corresponding nodes into the logistics information network system after the identities pass, writes registration information into a block chain for recording, and generates a pair of secret keys (a public key and a private key) for the corresponding nodes. The user sending node and the user receiving node can be registered and put on record in the same way. The whole process is completed only through an open interface of the main node, and the operation is simple.
The node information in the invention usually includes the identity information of the node, such as the public key of the node, the address of the node, the name of the logistics network point corresponding to the node, the contact way, etc.
The parcel state information reflects the transfer condition of parcels at each logistics node, and for any logistics node, the formed parcel state information comprises the time of the parcels arriving at and leaving the logistics node corresponding to the logistics node.
In order to conform to the frame structure of the existing block chain, the package information and the package state information can be uploaded by purchasing points from the slave node to the master node and by initiating a tiny point transaction.
In order to further improve reliability, only the master node has the right to modify the blockchain, that is, the blockchain is a private chain.
The digital fingerprint is actually an electronic verification code of the package information. Preferably, the main node generates the digital fingerprint for the package information uploaded by the user mail node through hash calculation.
In order to improve the reliability of the logistics tracking method, a pair of secret keys comprising a public key and a private key are arranged on a main node and each slave node in the logistics information network system, wherein the private key is stored by each node, and the public key is disclosed in the whole network (which means the logistics information network system);
when data transmission is carried out between any two nodes: the data sender signs the data to be transmitted by using a private key of the data sender and sends the data to the data receiver, the data receiver verifies the signature of the received data by using a public key of the data sender, and the node is a slave node or a master node.
When the user sending node uploads the package information to the host node:
the user sending node generates package information aiming at the package (namely the sent package), signs the package information by using a private key of the user sending node and uploads the package information to the host node, the host node verifies the received package information by using the public key of the user sending node, and if the verification is passed, the package information is stored in a storage device connected with the host node.
The mail needs to be signed by a private key, and the private key can be generated according to the personal identity real-name information, so that the problem of express real-name system can be effectively solved.
Because the parcel traffic is huge, the storage space is independently adopted for storage in the invention. Preferably, the storage device is a cloud storage device, and is connected with the master node through a cloud network.
The method for writing the package state information generated by each logistics node into the block chain by the main node is as follows:
the logistics node signs the generated package state information with a private key of the logistics node and then sends the generated package state information to the main node, the main node verifies the received package state information with a corresponding public key, and the package state information is written into the block chain if the verification is passed.
The user receiving node signs the package by the following method:
after receiving the package, the user receiving node signs the package information by using a private key of the user receiving node to form package signing information and sends the package signing information to the main node; and after receiving the package signing information, the main node verifies by adopting the public key of the user receiving node, and writes the signing information into the block chain after the verification is passed.
The package signing information comprises the digital fingerprint of the package information, historical state information, signing time, recipient signature and a public key of a user recipient node corresponding to the recipient.
In actual use, because the package information is stored by the storage server connected with the host node, when the user recipient node receives the package, the user recipient node firstly needs to acquire the package information of the package through an open interface of the host node, and then acquires the digital fingerprint of the package information.
And the master node broadcasts the block chain for each slave node to update after writing data into the block chain.
In the whole process, the complete block chain is recorded in the slave node, so that when the master node of the block chain network is damaged, the recovery can be carried out from any slave node.
In the invention, the slave nodes can be realized by a PC, a mobile intelligent terminal and the like, and the master nodes can be realized by a PC, a server and the like, and in consideration of data processing capacity, the master nodes are preferably servers, and further preferably can be realized by a server cluster.
When the logistics site of the logistics company changes, such as adding the logistics site or closing the logistics site, the existing logistics network system needs to be updated: if a logistics site is added, a slave node corresponding to the logistics site needs to be added to the logistics network system; when the logistics site is closed, the slave node corresponding to the logistics site needs to be deleted in the logistics network system.
Compared with the prior art, the logistics tracking method based on the private chain has the following advantages:
(1) the block chain technology is applied to the logistics field for the first time, and the traceability of the authenticity and the state of logistics information is guaranteed by using the non-falsification characteristic of the block chain;
(2) according to the characteristics of the private chain, the method can realize fast and efficient logistics information storage and state information updating, and meets the logistics real-time requirement;
(3) only the digital fingerprint of the package information is recorded on the block chain, and the detailed information is recorded on the logistics company server, so that the private information can be effectively protected;
(4) the private key signature of the receiver is needed for package signing, so that the problems of mischief and misleading, forged signature and the like commonly existing in the logistics industry can be effectively solved;
(5) the mail needs to be signed by a private key, and the private key can be generated according to the personal identity real-name information, so that the problem of express real-name system can be effectively solved.
Drawings
Fig. 1 is a schematic diagram illustrating an operation principle of the logistics tracking method based on the block chain according to the embodiment.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The logistics tracking method based on the block chain in this embodiment is implemented in the logistics information network system shown in fig. 1, and the logistics information network system includes: the system comprises a main node, a plurality of slave nodes and a storage device (a storage server in the embodiment) connected with the main node, wherein the main node is used for maintaining a block chain, and the slave nodes comprise a user consignment node (namely a consignor), a logistics node and a user consignee node (consignee); the logistics nodes comprise slave nodes which respectively correspond to addressees, network points (comprising an origin station, a transfer station and a destination station) and dispatchers of the express companies.
The main node and each slave node in the logistics information network system are provided with a pair of secret keys comprising a public key and a private key, wherein the private key is stored by each node, and the public key is disclosed in the whole network;
when data transmission is carried out between any two nodes: the data sender signs the data to be transmitted by using a private key of the data sender and sends the signed data to the data receiver, the data receiver verifies the authenticity of the signature of the received data by using a public key of the data sender, and the node in the embodiment is a slave node or a master node.
The master node is a network administrator of the network system, and has a large calculation amount, and is implemented by a server (i.e., a trusted server) in this embodiment.
The slave nodes are remote clients connected with the server serving as the master node, the user sending nodes and the user receiving nodes can be PCs or mobile terminals according to the functions of the slave nodes, the logistics nodes corresponding to the addressees and the dispatchers can be PCs or mobile terminals, and other logistics nodes are realized through the PCs.
In the logistics information network system, each main node and each slave node have independent identity information such as network addresses, names and the like.
Before the system is online, firstly, a logistics information network system is constructed based on a block link point adding method of identity authentication:
first, a pair of keys (master public key and private key) is generated for the trusted server at system initialization, and a first block is generated at the same time, and the registration information of the first block is written into the block. And then, the trusted server checks the identities of all addressees, websites and dispatchers of the express company, generates a pair of secret keys (including public keys and private keys) for each slave node after the identities pass, and writes all registration information into the block chain for recording. The sender and the receiver can be registered and put on record in the same way. The whole process is completed only through an open interface of the trusted server, and the operation is simple.
The block chain records registration information of a master node and each slave node (including nodes corresponding to a sender, a receiver, an originating station, a transfer station, a destination station, a sender and a receiver) in the logistics information network system, so that the legality of each node can be verified conveniently, and the authenticity and reliability of received logistics information can be ensured.
Based on the logistics network system, the logistics tracking method based on the block chain of the embodiment is shown in fig. 1, and includes the following steps:
step 1, a user sending node uploads package information to a host node;
after the sender node joins the network, the private key and the public key address can be obtained, package information can be uploaded through the trusted server interface, and the trusted server verifies the signature of the package information. In this embodiment, the user sending node uploads package information to a host node (trusted server) based on a digital signature technology, and the specific process includes the following steps:
s101, packaging the package information by the user sending node, sending the package information to a trusted server by using a private key signature, and simultaneously initiating a transaction from a public key address of the user sending node to a public key address of the trusted server;
s102, after receiving the package information, the trusted server firstly checks the block chain information according to the public key of the user sending node to acquire the registration information of the user sending node, verifies the validity of the user sending node, and if the verification is passed, the trusted server enters the next step of processing, otherwise, the trusted server prompts the user that the user is illegal;
and S103, the trusted server verifies the signature of the package information by using the public key of the user sending node, and sends the package information to a storage server connected with the trusted server for storage after the verification is passed.
Step 2, the main node generates a digital fingerprint according to the package information uploaded by the user sending node, writes the digital fingerprint into a block chain together with a corresponding timestamp, confirms the transaction at the same time, and broadcasts the block chain in all the slave nodes;
after the package information passes the verification of the trusted server, a digital fingerprint of the package information is generated through Hash calculation (SHA-256), the digital fingerprint is used as remark information of the transaction and is written into a block chain together with a timestamp of the transaction, and then the written block chain is broadcasted to all logistics nodes of the system for updating.
Step 3, each logistics node generates package state information according to the digital fingerprint and the node information of the logistics node and the next logistics node and writes the package state information into the block chain by the main node,
in this embodiment, the node information generally includes identity information of the node, such as a public key of the node, an address of the node, a name of a logistics node corresponding to the node, and a contact manner. The package state information reflects the transfer condition of the package at each logistics network point, and for any node, the formed package state information should comprise the time when the package arrives at the node and the time when the package leaves the node.
The specific implementation process of step 3 in this embodiment includes the following steps:
s301, the trusted server generates a digital fingerprint of the package information, signs the digital fingerprint with a private key, and packs and sends the digital fingerprint and the address of the master public key to a logistics node corresponding to a receiver;
s302, after receiving the broadcast packet of the trusted server, the logistics node corresponding to the receiver decrypts the broadcast packet by using the master public key address to obtain the digital fingerprint of the package information;
s303: after receiving an actual package, a logistics node corresponding to a receiver acquires package information through an open interface of a main node, calculates Hash of the package information and compares the Hash with the digital fingerprint in the step S302, if the Hash is successful, package state information (including node information of a current processing node and node information of a next node) is generated, then the package state information is signed by a private key and sent to a trusted server, meanwhile, a transaction from a public key address of the logistics node to a public key address of the next node is initiated, and if the Hash is not successful, the package is rejected;
s304, after receiving the package state information, the trusted server checks the signature by using the public key of the receiving node, confirms the transaction after the check is passed, and simultaneously writes the package state information into a block chain as a transaction remark and broadcasts the packet state information to all logistics nodes;
s305, an originating node (namely, the next logistics node behind the logistics node corresponding to the addressee) updates a block chain, calculates the Hash of the package information after receiving the actual package, compares the Hash with the digital fingerprint on the block chain, generates new package state information if the comparison is successful, then sends the new package state information to a trusted server by using a private key signature of the originating node, and simultaneously initiates a transaction from a public key address of the originating node to a public key address of the next node, otherwise, rejects the package;
s305: steps S304 and S305 are repeated until the package reaches the recipient.
And 4, the corresponding user receiving node signs the package, forms package signing information and uploads the package signing information to the main node to be written into the block chain.
After receiving the package, the user receiving node signs the package information by using a private key of the user receiving node to form package signing information and then sends the package signing information to the main node; and after receiving the package signing information, the main node verifies the package signing information by using the public key of the user receiving node, and writes the signing information into the block chain after the verification is passed. The specific process is as follows:
s401: when a receiver receives a package, firstly, a digital fingerprint of package information is obtained through an open interface of a main node and is compared with the digital fingerprint on a block chain, if the comparison is successful, a private key is used for signing the package information to form package signing information and the package signing information is sent to a trusted server, meanwhile, a transaction from a public key address to a main public key address is initiated, and if the comparison is failed, the package is rejected;
s402: after receiving the package signing information, the trusted server verifies the signature by using the public key address of the receiver, writes the information into the block chain and broadcasts the information to the whole network after the signature passes, all the slave nodes are updated synchronously, and otherwise, the receiver is refused to sign the package.
The package signing information comprises the digital fingerprint of the package information, historical state information, signing time, recipient signature and a public key of a user recipient node corresponding to the recipient.
The parcel state information (including express delivery state change information of logistics points, delivery information of couriers and the like) uploaded by logistics nodes is directly written into a block chain, parcel information uploaded by senders (including individuals, E-business enterprises, third-party sellers and the like) is verified by a trusted server and digital fingerprints of data are calculated, the digital fingerprints are recorded into the block chain for tamper-proof protection and tracking, meanwhile, the parcel information data (namely the parcel information) can be stored on a logistics company server for later verification and query, authenticity and traceability of logistics information are guaranteed, storage cost is reduced, and storage efficiency is improved.
Only the digital fingerprints of the logistics information are saved on the block chains, so that the huge block chains are avoided, and meanwhile, the data are stored in the cloud, so that the data can be consulted, and whether the cloud data are tampered or not can be quickly judged. And when the cloud data is judged to be tampered, Hash can be calculated according to the data in the cloud database, then the Hash is compared with the digital fingerprint on the block chain, and if the Hash is not consistent, the package information is judged to be tampered.
The above-mentioned embodiments are intended to illustrate the technical solutions and advantages of the present invention, and it should be understood that the above-mentioned embodiments are only the most preferred embodiments of the present invention, and are not intended to limit the present invention, and any modifications, additions, equivalents, etc. made within the scope of the principles of the present invention should be included in the scope of the present invention.

Claims (7)

1. A logistics tracking method based on a block chain is characterized in that the logistics tracking method is applied to a logistics information network system with a main node maintaining the block chain and a plurality of slave nodes, wherein the slave nodes comprise a user sending node, a logistics node and a user receiving node; the logistics tracking method comprises the following steps: the user sending node uploads package information to the host node; the main node generates a digital fingerprint aiming at the package information uploaded by the user sending node, writes the digital fingerprint into the block chain together with a corresponding timestamp, and broadcasts the block chain in all the slave nodes; each logistics node generates package state information according to the digital fingerprint and node information of the logistics node and a next logistics node corresponding to the logistics node in sequence according to a physical space transmission path of the package, and the package state information is written into a block chain by a main node; and the corresponding user receiving node signs the package and forms package signing information to be uploaded to the main node to be written into the block chain.
2. The block chain-based logistics tracking method of claim 1, wherein the master node generates the digital fingerprint for the package information uploaded by the user consignment node through hash calculation.
3. The method according to claim 1, wherein a master node and each slave node in the logistics information network system are provided with a pair of keys including a public key and a private key; when data transmission is carried out between any two nodes: the data sender signs the data to be transmitted by using a private key of the data sender and sends the data to the data receiver, the data receiver verifies the signature of the received data by using a public key of the data sender, and the node is a slave node or a master node.
4. The block chain-based logistics tracking method of claim 3, wherein when the user consignment node uploads the package information to the host node: the user sending node generates package information aiming at the package, the package information is signed by using a private key of the user sending node and then uploaded to the main node, the main node verifies the signature of the received package information by using the public key of the user sending node, and if the verification is passed, the package information is stored in a storage device connected with the main node.
5. The method for tracking logistics based on block chain as claimed in claim 3, wherein the method for writing the parcel status information generated by each logistics node into the block chain by the master node is as follows: the logistics node signs the generated package state information by using a private key of the logistics node and then sends the generated package state information to the main node, the main node verifies the signature of the received package state information by using a corresponding public key, and if the verification is passed, the package state information is written into the block chain.
6. The block chain-based logistics tracking method of claim 3, wherein the user recipient node signs for the package by: after receiving the package, the user receiving node signs the corresponding package information by using a private key of the user receiving node to form package signing information and sends the package signing information to the main node; and after receiving the package signing information, the main node verifies the package signing information by using the public key of the user receiving node, and writes the signing information into the block chain after the verification is passed.
7. The method for tracking logistics based on block chains as claimed in any one of claims 1 to 6, wherein the master node broadcasts the block chain for each slave node to update after writing data to the block chain.
CN202011501823.4A 2020-12-18 2020-12-18 Logistics tracking method based on block chain Withdrawn CN112488634A (en)

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