Tor switches to new Counter Galois Onion relay encryption algorithm

BleepingComputer

November 25, 2025 at 5:09 PM

Summary

Tor has upgraded its encryption method for circuit traffic by implementing the Counter Galois Onion (CGO) algorithm, replacing the older tor1 relay encryption. This change aims to enhance the security and privacy of users by improving encryption standards. The move reflects ongoing efforts to bolster the security of the Tor network against potential vulnerabilities.

Original Article Summary

Tor has announced improved encryption and security for the circuit traffic by replacing the old tor1 relay encryption algorithm with a new design called Counter Galois Onion (CGO). [...]

Impact

Tor network users

In the Wild

Timeline

Newly disclosed

Remediation

Users are encouraged to update to the latest version of Tor that includes the CGO algorithm.

Read Original Article

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