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[tor-relays] Re: Post-Quantum Cryptography in Tor's TLS Layer: Help needed!



On 19/06/2026 16.04, Felix wrote:
The relays are

since
May 08 22:38:42.281 [notice] Tor 0.4.9.8 running on FreeBSD
with ... OpenSSL LibreSSL 4.3.1, ...

since
Jun 02 19:17:27.354 [notice] Tor 0.4.9.9 running on FreeBSD
with ... OpenSSL LibreSSL 4.3.1, ...

but are still listed without PQC.

What should log notice state for a correct PQC key exchange? Or am I
missing something?

Hey Felix,

Nope. We in the Network Team need to fix this. It's an issue in Tor. I opened https://gitlab.torproject.org/tpo/core/tor/-/work_items/41300 yesterday with this specific problem after I had sent out the email to the list.

This is sadly one of those situations where a slight divergence between LibreSSL and OpenSSL, which will naturally occur over time, has an impact on us.

We'll get this fixed in one of the upcoming C Tor releases!

Cheers,
Alex

--
Alexander Hansen Færøy
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