Exploring the Optimal Intercept Access Point Placement Problem in Software-Defined Networks

Liang Chen, Ruisi Wu, Wen-Kang Jia

Abstract: In modern networks, Lawful Interception (LI) is one of the necessary means for security agencies to safeguard national security and prevent crimes. This article intends to explore the dynamic placement problem of intercept access points (IAPs) unique to SDNs, and their derived interception strategies. by selecting the optimal intercept access point, bring the shortest path among the three points-source, destination, and law enforcement agency (LEA). In order to reduce the redundant return intercepted traffic in the network, the operating cost of the LI system must be minimized. We also addressed the performance of the fastest access to the return traffic by the LEA, and the impact on the communication quality of the monitored users. Comparison among the three-interception strategies-source/destination interception model, blocking interception model, and bicast model. the simulation results expressed as a percentage that improved by using the different strategies compared with each other of the total costs of ISP, the performance of LEAs, and affected QoS of monitored users.