Design Of Illegal Information Filtering Firewall With The Emotional Words

With the development of Internet technology, it not only brings on convenience to the people, but also leads to the issue of network security. There are about 30 million pornographic websites in the world, at the same time online illegal websites also spread. People focus on the network virus and the hacker's attacks. Currently only relying on the firewall based on the keywords filtering can't resist effectively the attacks based on the contents, although it has high speed. To solve this problem, this paper introduces an illegal information filtering firewall to recognize and filter the illegal information to achieve a high accuracy and speed through the analysis of the content of the text from the layer of the network and the application.Currently the research of the content filtering firewall is the development trend of the firewall, but the related technology is not very mature. The content analyzing model of the content filtering firewall analyze the content only from the keywords with low accuracy rate of distinguishing the illegal information and the legal information, because of not in-depth analysis of the semantic content.In this paper the firewall system combine the emotional words around the key words mainly from the complexity and special nature of the illegal content. A type of the firewall mode is advanced and the main research and result are as follows:1) The overall analysis of the illegal information from the content and the recognition and selection of them.2) Combination of the recognition of the emotional words around the special words. Mainly for the existing illegal information filtering system is only from the analysis of the theme not from the deeply semantic analysis, the recognition of emotional words around the keywords comes from the mutual information as the basis of classification to achieve a precise classification in the paper.3) The multi-filtering firewall structure. In the paper the design of the type firewall has two filtrations. The first one is the filtration of the illegal web sites to improve the speed; the second one analyses the content of the filtered information through the first one to achieve the more accuracy.