With the continuous development of computer communication network technology, it is inevitable to deal with various security risks in the development process. In this regard, relevant departments must pay special attention to and take active and effective preventive measures. The typical application technology is data encryption technology. Data encryption technology can effectively ensure the integrity and confidentiality of data information in the process of computer network communication. Therefore, relevant technical personnel should strengthen the research on data encryption technology and promote the healthy and orderly development of computer network communication. This article focuses on the current status of communication network security, and studies typical data encryption technologies, with a view to helping to strengthen computer network security.