http://magma.ua4vjlx72wv5crhkificaeysp62hizhazipfshsdvs6jxqvhtkpllcad.onion/guide/data-analysis.html
Tor is a distributed, low-latency anonymity network for TCP-based applications
such as web browsing, email communication, secure shell, instant messaging chat,
and other services. Tor clients can choose a path through the network and build
a secure circuit in which each node (relay or onion router) in the path knows
its immediate predecessor and successor, but no other nodes in the circuit.