Analysis of Security Policy in Practical Internet Coordinates
Network Coordinate (NC) System is an effective mechanism to predict network delay with limited measure overhead. As one of the representative NC systems, Practical Internet Coordinates (PIC) has proposed a security policy based on triangle inequality to defend malicious nodes in the system. However, there is a natural phenomena that nodes may violate triangle inequality in Internet. Thus, the performance of PIC security policy is worthy to be well researched under different attacks. In this paper, the authors analyze the security policy in PIC in three real network delay data sets and compare PIC with security to without security under four typical attacks.