Establishment And Dynamic Analysis Of Two Types Of Network Worms

Because of the rapid growth, the complicated communication forms and devastatinginternet worm, the worm has been one of the most important and active research topics inthe felds of network security and military security. It’s a urgent problem to defense internetworm. There is complex relationship between internet worms. We need give some measuresto control the internet worm. In the paper, we analysis the worm which spreads via bothWeb-based scanning and removable devices, and the complex relationship among internetworms. Besides, we can give measures of controlling worms.Firstly, we present a model which incorporates specifc features of these worms in thispaper. Then, we got the threshold, a disease-free equilibrium and an unique positive equi-librium. We analyze the dynamical behavior when only one subnet is considered. Thedynamical behavior of one specifc subnet when other subnets are considered and they havereached stable states. If a computer is infected in one subnet, the other computers will beinfected in a short time by theoretical analysis and numerical simulations. We can improvethe security awareness of using removed devices to prevent the frst computers from beinginfected by the Flash Disk worms.Secondly, the complex relationship among internet worms have great impact on thedynamics of worms. To describe the propagation of Internet Worm, it is necessary to char-acterize these interactions. A two-worm model is presented, and we got the thresholds, adisease-free equilibrium, two boundary equilibriums and an unique positive equilibrium. Bytheoretical analysis, we get that the worm can be controlled by adjusting the parameters.Furthermore, we can give measures of controlling worms. In the end, we verify the theoreticalanalysis results by numerical simulations.Lastly, a two-worm model is presented, and we got the thresholds and the disease-freeequilibrium. And the disease-free equilibrium is locally asymptotically stable, when thethresholds are greater than one, the worms can persistent immune responses.