Onion Routing
A product of the US Navy Research Lab, the Onion Routing is an Internet based system to prevent eavesdropping and traffic analysis attacks. It is now "off-line" but listed in the ODP for completeness and potential new developments
onion-router.net
Description: Onion Routing is an Internet based system to prevent eavesdropping and traffic analysis attacks
Keywords: onion routing traffic analysis privacy anonymity anonymous security remailer http smtp