There is also this research on the IETF standard for "lawful intercept" in routers: Exploiting Lawful Intercept to Wiretap the Internet https://www.blackhat.c

There is also this research on the IETF standard for "lawful intercept" in routers: Exploiting Lawful Intercept to Wiretap the Internet https://www.blackhat.com/presentations/bh-dc-10/Cross_Tom/BlackHat-DC-2010-Cross-Attacking-LawfulI-Intercept-wp.pdf https://www.blackhat.com/presentations/bh-dc-10/Cross_Tom/Bl...