Tor turns to proof-of-work puzzles to defend onion network from DDoS attacks

stapp · Aug 26, 2023

To thwart future debilitating DDoS attacks, Tor developers have been working on a defense first proposed in April 2020. It just arrived in Tor version 0.4.8.4 and it relies on a mechanism developed in 1992 by Moni Naor and Cynthia Dwork as a defense against DoS and spam but made famous for energy profligacy by Bitcoin: proof-of-work.
Essentially, clients trying to reach .onion services may be asked to complete small proof-of-work tests. If you're connecting as a legit user, you shouldn't notice anything. If you're trying to hammer the project's network of nodes with lots of repeated connections, the proof-of-work challenges may well hamper your attempts.
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https://www.theregister.com/2023/08/26/tor_tweaks_onion_routing_software/

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Tor turns to proof-of-work puzzles to defend onion network from DDoS attacks

stapp Global Moderator

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Tor turns to proof-of-work puzzles to defend onion network from DDoS attacks

stapp Global Moderator

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