With the popularity of Internet applications and people's dependence on the Internet, the security problem of the Internet has become increasingly prominent. Malicious programs, all kinds of phishing and technical theft continue to grow at a high speed. With the sharp increase of various cyber attacks, the personal information disclosure and property losses of a large number of netizens are increasing day by day. According to public information, since 20 1 1, the private information of165438+27 million users has been leaked. Include basic information, equipment information, account information, privacy information, social relation information and network behavior information. Man-made reselling of information, PC infection, website loopholes and mobile phone loopholes are the four major ways to disclose personal information at present. The disclosure of personal information is very harmful. In addition to raising awareness of information protection, the state is also actively promoting the legislative process of protecting personal information security. 2065438+September 1 1, in 2008, China Consumers Association released "Personal Information Disclosure of APP" in Beijing, and 85.2% of the respondents had personal information disclosure experience.