Artificial Immune System And The Appilication In Defending Virus

Computer virus bring about huge threaten to computer and network security, with the increasing wide spread of deformed virus on network, the traditional methods and tools of defending virus show more and more defects, and the key problem is traditional methods can not exact examine virus especially the deformed virus.Because biology immune system has the characters of distinguish self cells with high parallel and high exactly, we can establish a virus detecte system which based on artifical immune theory, through the methods of dynamic clone selection, heredity and muation and so on, detecters make the system distinguish the new virus. The system has good self-adaptability, self-stability and robusty. The study of artifical immune system not only has the important practical value in defence from computer virus, but also has the profound theory value in artifical intelligence research.Based on aritificial immune system, this thesis establish a virus detection model :AISVDM, the system created the dynamic immune cells , defined the process from birth, growth, evolution, maution to death of immune cells and realize immune mechanism on each stage. The system compensate the defects of traditional tools of against virus, it not only can distinguish the virus defined but also can distinguish the deformed virus. This thesis proved the system have good dynamic state and self-adaptability through experiment, it gained good effects.In particular, the achievement of this thesis as follows:A virus detection model based on artificial immune system is presented. The memory detecters are designed to realize second response; we designe the life cycle of detecters to realize the dynamic and self-adaptation of the system; and we designe the heredity and muation of detecters in order to realize the diversity of detecters, realize the good self-stability and robusty of the AISVDM. We designe and realize self-body and non-self-body of the system. A set of self-body became from Some regular executable files ,and these file can be easily infected by virus. The set of non-self-body became from 50 kinds virus character codes, these character codes turn to new deformed virus through muation. The deformed virus is important aspect in test the self-adaptation of the system.We designe the immune cells. In this experiment, detecters are immune cells, the system can dynamic produce detecters, through the process of self-tolerance, detecters can grow to mature derecters which have immune function, derecters can successful distinguish the new deformed virus through muation.We realize the dynamic clone selection algorithm. With the corporate stimulate of antigen, detecters through controled muation can distinguish the family virus rapidly, it also can distinguish defferent family virus through random muation.We designe and realize the process of immune study. Through the process the initial system gain some immune function, it provide a basic condition for the evolution of the immune system.