r/onions • u/BTC-brother2018 • 21m ago
On the Effectiveness of NetFlow-Based Deanonymization of Tor Onion Services (Extended Version)
Researchers published a paper titled On the Effectiveness of NetFlow-Based Deanonymization of Tor Onion Services.
Their research demonstrates that attackers with access to certain network traffic records may be able to identify the network location of an onion service.
The researchers investigated three techniques, including one that exploits information exposed by Tor's proof-of-work denial-of-service defenses.
The concerning discovery: Some attacks worked using relatively coarse network measurements rather than detailed packet captures.
The researchers evaluated their techniques using data from the live Tor network.
Tor encrypts traffic and conceals network locations, but traffic analysis remains a potential weakness.
An attacker who can correlate traffic patterns may infer information without decrypting the underlying communications.
This research concerns onion-service anonymity. It does not establish that ordinary Tor Browser users can be routinely identified.