Research And Design Of Anti-Tampering Scheme For Northbound Data Of Mobile Communication Network Management System Based On Blockchain

Mobile communication network management data is an important analysis data for measuring various indicators of mobile communication,and northbound data is an important part of it.The northbound data of the existing mobile network management system adopts a centralized service architecture model,and the following problems exist in the data flow process:(1)During the process of data transmission,each provincial company has absolute control over the data,they may maliciously tamper with data,and the data security review mechanism is missing;(2)In centralized storage methods,the process of data authorization and authentication is not transparent enough,data may be used unauthorized or illegally accessed,tampered with,etc.,the user's access process is not easy to track,and the granularity of access control is relatively large.Blockchain technology has the characteristics of decentralization and non-tampering.It is an effective technology to realize data security storage and data traceability,and provides a solution for the security problem of northbound data in the mobile communication network management system.Therefore,based on the research of blockchain technology,the thesis researches and designs an anti-tampering plan for northbound data.The main contents are as follows:(1)Design a secure storage plan for northbound data based on blockchain.Through field investigation of the traditional mobile communication network management system,and understand the entire flow of northbound data,we select the appropriate blockchain technology,and design at the beginning of the northbound data assembly to perform data hash evaluation,and store the hash value and data identification information on the chain.The original data is stored in accordance with the traditional process,that is,a storage scheme combining on-chain and offchain.At the same time,in view of the serious waste of resources in data detection methods,a regular polling audit mechanism was designed to pay attention to data quality in real time.Finally,for the problem that the transparent endorsement node identity in the Hyperledger Fabric blockchain technology adopted in the scheme may be maliciously attacked,combined with Algorand's preselection of block producers strategy,it is improved,and an endorsement node selection algorithm based on a random verifiable function is proposed.(2)Design an access control mechanism based on blockchain.The improved RBAC algorithm is used to implement data access control,specifically,first assign roles to users through RBAC,grant initial permissions,then,according to ABAC,permissions are modified according to user attributes.The thesis implements the access control strategy generation and strategy decision through smart contract logic,and stores them in the blockchain to form a log chain,which together with the data chain in the storage solution forms a double-chain structure.Based on the characteristics of the blockchain,this solution can effectively solve the problem of opacity authorization and authentication process,and the improved RBAC can achieve more fine-grained access control.