Hello Tor Relay Operators! I did a scan of the network again yesterday. Here're the numbers that you can compare against our numbers from March: Scan Stats: - 9707 relays were reachable. - 106 relays were unreachable. Cipher Suites: - `TLS13_AES_256_GCM_SHA384`: 9517. - `TLS13_CHACHA20_POLY1305_SHA256`: 155. - `TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384`: 32. - `TLS13_AES_128_GCM_SHA256`: 3. Key Exchange Groups: - `X25519`: 4827. - `X25519MLKEM768`: 4326. - `secp256r1`: 554. Directory Authorities: - 10 out of 10 were reachable. - `TLS13_AES_256_GCM_SHA384` was used by all 10. - `X25519` was used by 5, and `X25519MLKEM768` was used by 5. 4326 / 9707 * 100 = 44.57% of the relays support PQC handshakes right now. It's great to see that we have over 1000 more relays supporting PQC, but we are still a bit away from being able to enforce PQC in any possible manner here. I've updated the list of relays and what they support here: https://ahf.me/tor-tls-pqc/2026-06-18/ If your relay does not yet support the `X25519MLKEM768` group, it would be really lovely if you could look into upgrading your TLS library (OpenSSL >= 3.5.0 and LibreSSL >= 4.3.0) used by your relay. Thanks all for running relays! <3 Cheers, Alex On 02/03/2026 14.29, Alexander Hansen Færøy via tor-relays wrote:
The summary of yesterday's scan is as follows:
Scan Stats: - 9562 relays were reachable. - 158 relays were unreachable.
Cipher Suites: - `TLS13_AES_256_GCM_SHA384`: 9352. - `TLS13_CHACHA20_POLY1305_SHA256`: 165. - `TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384`: 39. - `TLS13_AES_128_GCM_SHA256`: 6.
Key Exchange Groups: - `X25519`: 5350. - `X25519MLKEM768`: 3313. - `secp256r1`: 899.
Directory Authorities: - 10 out of 10 were reachable. - `TLS13_AES_256_GCM_SHA384` was used by all 10. - `X25519` was used by 5, and `X25519MLKEM768` was used by 5.
3313 / 9562 * 100.0 = 34.65% of relays are supporting the `X25519MLKEM768` PQC handshake in the network right now.
-- Alexander Hansen Færøy