Lawful interception of IP traffic

When compared with access network interception, lawful interception of the internet is both more difficult and much less mature. However, Internet interception is becoming increasingly more important as law enforcement agencies find that access network interception is becoming less effective. Unfortunately, the most common approach to internet interception has some fundamental weaknesses, which may compromise security, privacy and network reliability. In this paper we explain how internet interception differs from access network interception, highlight the weaknesses in existing solutions and suggest alternative approaches to internet interception and how they might be developed.