The Research On Email Filtering Technology Based On The Artificial Immunization System

This thesis focuses on anti-Spam technology. It proposes a system of Spam filtering based on the artificial immunization system (AIS), the description of the implement of the key arithmetic and the discussion of the nucleus module that is the design and realization of the Spam filtering based on the immunity algorithm.Firstly we analyze the basic principle of E-mail, study the advantage and disadvantage of nowadays anti-Spam technology, and put forward a kind of project of an artificial immunization principle filter as the nucleus, which includes some other advanced filtering technology and uses the AlS-based Spam filtering technology on Transport Agent (MTA). The immunity algorithm is the central of the new Spam filtering technology, which fully imitates the adjusting selfhood mechanism of living things immunity system, and makes the new technology to possess the good characteristic such as self-adapting, self-learning and robust etc.Secondly, based on analyzing the AIS principle, the paper discusses in detail the design idea of the system and put forward a concrete design project and illuminates the key technologies. In the 5th chapter we also introduce the realization of the arithmetic and give out the data structures and methods. And then, the paper deeply analyzes the result of the experiment with the Bayes-based email filtering technology.As the end of the paper, some views on the future development of this project and some problems of the AlS-based Spam filtering technology to be answered are given.