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Onionflation attacks on Tor network

From "Anonymous Remailer (austria)" <mixmaster@remailer.privacy.at>
Subject Onionflation attacks on Tor network
Message-ID <d9c3ed1b28af31a513b9effc29ad6e4f@dizum.com> (permalink)
Date 2026-03-02 01:06 +0100
Newsgroups alt.cypherpunks, alt.privacy, alt.privacy.anon-server, comp.protocols.tcp-ip, si.comp.protocols.tcp-ip
Organization dizum.com - The Internet Problem Provider

Cross-posted to 5 groups.

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2600 - The Hacker Quarterly  · 
Andrew Strutt
 ·
Admin
 ·
4h
 ·
A group of security researchers just developed a new family of attacks 
dubbed OnionFlation, that turn tors denial of service defense mechanism 
against its own users. This enables attackers to essentially bring down 
any onion service of their choosing. This class of attacks actually takes 
advantage of an asymmetry in onion routing, which reveals a persistent 
issue facing the tor network. As a result, these types of attacks are 
difficult to properly patch or defend against. I use my own Onion Service 
to demonstrate the principals of this attack in real time.

https://www.usenix.org/conference/usenixsecurity25/presentation/lee

https://www.facebook.com/groups/2600net/posts/4482651051957985/

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Onionflation attacks on Tor network "Anonymous Remailer (austria)" <mixmaster@remailer.privacy.at> - 2026-03-02 01:06 +0100

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