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Tor Implements Counter Galois Onion Encryption for Enhanced Security

First seen 25 Nov 2025, 18:29 UTC • Blog.Torproject

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Tor has transitioned to a new encryption algorithm called Counter Galois Onion (CGO) to improve the security of its circuit traffic. This change aims to bolster defenses against modern traffic-interception attacks, thereby enhancing user anonymity on the Tor network. The new algorithm replaces the older tor1 relay encryption and is expected to support future cryptographic advancements.

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Tor Implements Counter Galois Onion Encryption for Enhanced Security

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