Man Tor
NAME tor - The second-generation onion router
SYNOPSIS tor [OPTION value]…
DESCRIPTION Tor is a connection-oriented anonymizing communication service. Users choose a source-routed path through a set of nodes, and negotiate a “virtual circuit” through the network, in which each node knows its predecessor and successor, but no others. Traffic flowing down the circuit is unwrapped by a symmetric key at each node, which reveals the downstream node.
Basically, Tor provides a distributed network of servers or relays (“onion routers”).
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