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🚨🔃 Arti 2.5.0 is out. This release marks Counter Galois Onion as stable, enables Congestion Control by default for improved speed, and includes fixes for two medium-severity DoS security issues. Read the full changelog: blog.torproject.org/arti_2_5_0_r...

blog.torproject.orgArti 2.5.0 released: Stable Counter Galois Onion | Tor ProjectArti 2.5.0 is released and ready for download.

Tor Project

@torproject.org

What is Counter Galois Onion? A new encryption design for Tor circuit traffic. The main goal: stronger protection against tagging attacks, where an attacker tries to modify traffic in one place and recognize the change somewhere else on the network. blog.torproject.org/introducing-...

blog.torproject.orgCounter Galois Onion: Improved encryption for Tor circuit traffic | Tor ProjectTor is upgrading its relay encryption algorithm for improved security. In upcoming releases, Arti and Tor will both support a new encryption algorithm called Counter Galois Onion (CGO). CGO prevents a...

1/7/26, 9:53 pm2 reposts9 likes

Tor Project

@torproject.org

1 July

What is congestion control? Instead of using a fixed speed limit, congestion control lets Tor adapt how much data moves through a circuit based on available capacity. For users, the goal is simple: improved speed and lower latency. blog.torproject.org/congestion-c...

blog.torproject.orgCongestion Control Arrives in Tor 0.4.7-stable! | Tor ProjectTor has released 0.4.7.7, the first stable Tor release with support for congestion control. Congestion control will result in significant performance improvements in Tor, once Exit relays upgrade. Rel...