1. NetIntercept. http://www.sandstorm.net/products/netintercept/
2. NetWitness. http://www.forensicsexplorers.com/
3. Electronic Crime Scene Investigation: A Guide for First Responders (July 2002), http://www.ojp.usdoj.gov/nij/pubs-sum/187736.htm
4. Bellovin, S.M.: Wiretapping the net. The Bridge 20(2), 21–26 (2002)
5. Blaze, M., Bellovin, S.M.: Inside RISKS: Tapping, tapping on my network door. Communications of the ACM 43(10) (December 2000)