A
network
software diagnostic tools created and used by the U.S. Federal Bureau
of Investigation (FBI) in crime investigation. Carnivore is a Windows-based with
packet-
sniffing software that is installed at an Internet service provider (
ISP)
to sniff traffic on a LAN, looking for e-mail messages in transit. The FBI may
only use the Carnivore system in places where permission by the system or ISP
owner has been granted, or with a a court order as part of an investigation. The
FBI has retired Carnivore and now uses commercial products instead.