Measuring anonymity in P2P anonymous communication system
Jigang Wen · Journal of Computer Applications · 2008
The model of P2P anonymous system and attack model were analyzed. And then based on information entropy and aiming at collusion attack, receiver anonymity of several kinds of typical systems were measured. Finally, mathematic analysis was provided for the relationship among anonymity, the size of system, the proportion of malicious node, the length of rerouting path and forwarding probability. Calculations show that nested encryption causes the system to obtain strong anonymity, and the degree of receiver anonymity increases while the system scale increases and decreases while the proportion of malicious node increases. The degree of receiver anonymity is affected by the proportion of malicious node and the system scale obviously, and is affected by the length of path slightly.