Blockchain-based User Data Storage And Protection in 5G Core Network

The core network is the most significant mobile communication system control unit and is responsible for user registration, authentication, and session establishment. Storing subscriber information is an essential primary function of the core network, and in order to ensure the security and stability of the core network operation, high requirements are put forward for the core network storage unit. Due to its intrinsic nature, blockchain has overwhelming advantages over traditional databases in terms of robustness, data consistency, high availability, etc., and has nearly unlimited scalability. With more and more user devices accessing the network, the service pressure of operators is increasing with each passing day, so we propose a core network solution based on blockchain. The blockchain is used as the data storage unit of the core network, and the smart contract is utilized to read and write the data and control the permissions. The blockchain key pair further refined the data permission management of different network elements. This solution can improve the security and robustness of the core network.