1、 Blockchain processing of logistics tracking : Firstly, the smart contract and distributed ledger of the blockchain are used to process the logistics contract and transaction , Smart contracts are code written on the blockchain , When the terms in the smart contract are triggered at a certain time , Code will automatically replace manual auditing and execution , And then share it among network members through distributed ledger 、 Replication and synchronization of the database , To facilitate point-to-point transactions , At the same time, the blockchain can be used to set a series of smart contracts with software code , And in the smart contract, the obligations of each party and the judgment conditions of the contract are clearly specified , So that the blockchain system can automatically judge the contract execution conditions , If all the criteria are satisfied , Then the blockchain system can automatically enforce the contract terms ;


2、 Build logistics tracking blockchain : The traceability of the blockchain is guaranteed through the node association logic , Different time stamps can be set on different block nodes , It is used to distinguish different block nodes , Then the information between different block nodes is connected through the block header node , So that all the blocks can form a whole structure , The blockchain can be formed ;


3、 Building logistics tracking blockchain network ; In the logistics tracking blockchain system , take 2 The constructed blockchain forms multiple network nodes , Each individual node holds all the data information of the blockchain , Can make data information have a lot of backup , Can effectively avoid data information because of damage 、 Loss and deviation , In the blockchain network , Each node has the same data information , The nodes participating in data storage can also form mutual supervision and management ;


4、 Build an encryption system for logistics tracking blockchain : The asymmetric encryption algorithm is used to encrypt the logistics tracking block connection , If you use a public key to encrypt data information , Then the decryption of data information needs to use the corresponding private key , If you use a private key to encrypt data information , The decryption of data information can only rely on the corresponding public key , When users use blockchain , You'll get two exclusive keys at the same time , After that, when the user uses the public key to encrypt the data information , Data information can only be browsed by users themselves , But if the user encrypts the data information with the private key , Then other users on the network can use the public key to decrypt and browse the data , At the same time, the user uses the private key to encrypt the data information and sets the digital signature at the end of the data , Then other users on the network can use the public key to decrypt the data information ;


5、 Establish the application blockchain database of logistics tracking : First, the user's sending node uploads the package information to the master node , The master node generates a digital fingerprint for the package information uploaded by the user's sending node , Write to the blockchain with the corresponding timestamp , And broadcast the blockchain in all slave nodes , Then, according to the physical space transmission path of the package, each logistics node generates the package status information according to the digital fingerprint and the node information of itself and the corresponding next logistics node, and the master node writes it into the blockchain , Then the corresponding user receiving node signs the package and forms the package signing information, which is uploaded to the master node for writing into the blockchain ;


6、 The master node generates the digital fingerprint for the package information uploaded by the user's sending node through hash calculation : The master node and each slave node in logistics information network system are equipped with a pair of secret keys including public key and private key , Data transmission between any two nodes , The sender uses its private key to sign the data to be transmitted and send it to the receiver , The data receiver uses the public key of the data sender to verify the signature of the received data .