Discover the definition of the term Tor (The Onion Router) presented by Les Assises de la Cybersécurité.


The Tor network is probably the best-known Dark Net (see “Dark Net”). It gets its name from the way data is encrypted, by stacking layers of encryption like onion skins. This data is then sent along a circuit made up of nodes (volunteer computers around the world) selected at random. Each node can only decrypt its “skin” of the onion, and only knows the IP address of the previous and next nodes. Thus, with three nodes, it is impossible for a single one of them to know both the source IP address of the message and its destination. The Tor network is based on the classic Internet network and works like an overlay, using the same standards (TCP/IP).

They say that onions make you cry. At least that’s what cybercriminals say under lock and key after having had too much confidence in Tor’s supposed anonymity.

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