Research Of Artificial Immune Model Based On Danger Theory

As human understanding of biological cells and the secret of organism defense virus, the organisms'ability of anti-virus has also been imitated and referenced in computer security. Currently, most of the artificial immune systems are built on the traditional self-nonself (SNS) discrimination model. The SNS model is simple and easy to understand, and it has high recognition efficiency in the known self or non-self. However, because of the design flaw of the SNS model, it's not well to distinguish unknown self or nonself. In other words, the SNS model has a very low recognition rate and high false alarm rate. So a new theory - danger theory has been introduced, the theory thought the danger signals within the body was the key to trigger the immune response, which can be a good model to solve the problem of SNS.This paper describes an important organism antigen presenting cells - dendritic cells (DCs), and introduces dendritic cells in the application of artificial immune in detail. After considering the advantages and disadvantages of the SNS model and the danger theory, the paper analyses the advantages of the SNS model which is simple and fast for known antigen distinguishing, and the advantages of the danger theory which can distinguish unknown antigen. Then the artificial immunology model based on the fore-mentioned two models is proposed. The new model has both advantages of the SNS model and the danger theory. The experiment shows that the new model is not only effective and fast, but also has higher detection rate and lower false alarm rate.