Network information security encryption system based on cloud computing

The invention discloses a network information security encryption system based on cloud computing, relates to the technical field of information security, and solves the technical problems of data encryption resource conflict and single encryption mode for concurrent data encryption in the prior art. Comprising a data center, a data classification module and a file encryption module. The data center performs data query processing based on the data request information to obtain a corresponding target file; when the target file is sent to the external environment, the data classification module is used for collecting a transmission record of the target file to carry out transmission factor CS analysis so as to classify the target file; if the target file is core data, encrypted transmission is carried out on the target file, and utilization of encrypted resources is maximized; and the file encryption module is used for generating feature information in combination with the file identifier of the target file, an