Information security mainly includes the following five aspects: the need to ensure confidentiality, authenticity, integrity, unauthorized copying and the security of parasitic systems. Information security itself contains a wide range, including how to prevent the disclosure of secrets of commercial enterprises, prevent teenagers from browsing bad information, and disclose personal information. The information security system under the network environment is the key to ensure information security, including computer security operating system, various security protocols, security mechanisms (digital signature, message authentication, data encryption, etc. ), and even security systems, such as UniNAC and DLP. As long as there are security loopholes, global security may be threatened.