Abstract: Authentication mechanism has important meanings to network security defence. Most researchers mainly focus on putting forward new authentication methods and analyzing the security of authentication protocols, but ignoring the research of quantitative analysis on authentication method. By analyzing the system of authentication as a quasibirth-and-death process, establishing a two-dimensional queuing model, the steady probabilities distribution can be obtwined to compute some important indices. The experimental results prove that the general analytical method can effectively evaluate the performance of authentication method.

Key words: Authentication,Network security,Queuing mode,Performance analysis