Wired News: "
Onions may be the secret ingredient in protecting the Pentagon's classified information.
During an afternoon presentation at the Usenix Security conference on Thursday, a researcher at the U.S. Naval Research Laboratory described a
technology known as "Onion Routing," which preserves anonymity by wrapping the identity of users in onion-like layers. The Onion Routing solution, which follows much the same recipe as Zero
Knowledge's Freedom software and cypherpunk-developed mixmaster remailers,
is to forward communications through a complicated network that bounces
Internet packets around like pinballs and hides the origin and destination from all
but the most determined eavesdroppers."