Design and Simulation Implementation of an Improved PPM Approach

Different from recent probabilistic packet marking (PPM) methods, Dynamic PPM may solve many problems of traditional methods, such as loss of marking information, hard to reconstruct attack path, low accuracy, and so on. A novel DPPM approach is proposed and the network simulation software (NS2) is used to verify the performance and efficiency of the approach by constructing simulation DOS environments. In comparison with PPM methods, simulation results show that DPPM is much better