Onion Service
Definition
A Tor-based server reachable only through the Tor network via a .onion address derived from the service's public key. The routing protocol conceals the server's IP address from users and the user's IP address from the server, making physical location identification a primary investigative challenge.
- Address format
- .onion, derived from the service's public key
- Access route
- Only through the Tor network
- Concealment
- Hides server IP from users and user IP from server
Common questions
Why is locating a dark web marketplace's server so difficult?+
The onion service protocol routes connections through rendezvous points inside Tor so that neither the visiting client nor the server ever exchanges IP addresses directly, removing the usual network trail investigators rely on.
What investigative approaches work against onion services despite this?+
Common methods include exploiting server-side misconfigurations or vulnerabilities, tracking cryptocurrency payment trails, undercover purchases, and, in some documented cases, correlating traffic timing across cooperating network vantage points.
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