Network information security technology based on cloud computing environment

: With the rapid development of cloud computing technology, the problem of network information security has become increasingly prominent. This paper aims to study the network information security technology based on cloud computing environment, in order to improve the security and reliability of the network system. Firstly, the challenges and problems faced by network information security in cloud computing environment are analyzed, including data privacy protection, identity authentication, access control and so on. Then, the common network information security technologies, such as encryption algorithm, firewall and intrusion detection system, are introduced, and their applications in the cloud computing environment are discussed. Then, a network information security technology framework based on cloud computing is proposed, which comprehensively considers the characteristics of cloud computing and the requirements of network information security, and can effectively protect the network system in the cloud computing environment. The research results of this paper are of great significance for improving the level of network information security technology in cloud computing environment, and also have certain reference value for promoting the development and application of cloud computing technology.