Tor (short for The onion
router) is a system intended to enable online anonymity. Tor
client software routes Internet traffic through a worldwide volunteer
network of servers in order to conceal a user's location or usage
from anyone conducting network surveillance or traffic analys. Using
Tor makes it more difficult to trace Internet activity, including
"visits to Web sites, online posts, instant messages and other
communication forms", back to the user]
and is intended to protect users' personal freedom, privacy, and
ability to conduct confidential business by keeping their internet
activities from being monitored.
"Onion routing" refers to the layered nature of the
encryption service: The original data are encrypted and re-encrypted
multiple times, then sent through successive Tor relays, each one of
which decrypts a "layer" of encryption before passing the
data on to the next relay and, ultimately, its destination. This
reduces the possibility of the original data being unscrambled or
understood in transit.
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