| Currently, the growing number of bad information in the network, which mainly pornographic content, but also mingled with gambling, fraud, firearms trafficking and other illegal content. With the popularity of the Internet in every household, we urgently need to create a better and positive Internet environment, the maximum extent to avoid bad information on the adverse effects of children, as well as the majority of Internet users to mislead and abuse.In this thesis, a network source of bad information detection system using a controlled manner, the deployment in ISP data center network outlet, which is the ICP purchased separately using a separate detection system compared to the way more conducive to control measures unified deployment. With the mainstream portals and forums have been basically settled in the data center, effective control of the source of the information content of the data center will likely release more effectively promote the network civilization and network security. The beginning of system design, and strive to fully consider the redundancy and scalability requirements, the use of distributed capture, centralized approach to system design. System mainly consists of four main parts:data collection and storage, protocol analysis and reduction, content identification and web crawlers. Including protocol analysis and reduction, as well as content recognition module based main research directions.Upon completion of the text, picture identification of bad information, the system will automatically record the problem sites and links and tips, information security management personnel will be able to facilitate the use of these sources of information on bad information retrospectively, and through administrative and economic penalties ways to enhance the elimination of bad information.This thesis conducted in-depth research on bad information on the network detection system, designed and developed a set of bad information detection system. System operation verification results show that the system creates a better and positive Internet environment, the maximum extent to avoid bad information on the adverse effects of children, as well as misguided and against the majority of Internet users have a positive effect. |
