topic Re: ed25519-sk and ssh in Secure Access Discussions

ed25519-sk and ssh

Andi1075 — Mon, 02 Feb 2026 18:11:31 GMT

Hallo Community,

I was wondering if it's possible to establish a ssh connection with ed25519-sk certificates using f.e. Nitrokey or Yubikey.
I was able to use ed25519 or ecdsa certs - but the switch refuses to take the "sk" ones. Is there any work arround or something I missed ?

B/R
Andy

Re: ed25519-sk and ssh

Cristian Matei — Sat, 07 Feb 2026 08:02:49 GMT

Hi,

@Andi1075 Per my best knowledge, this capability is not there. If you want 100% confirmation outside of your already performed tests, open a TAC case. Additionally, also reach to Yubikey support, they usually they have good understanding of what's supported on which vendors.

Good luck,
Cristian.

Re: ed25519-sk and ssh

Andi1075 — Sun, 08 Feb 2026 14:39:54 GMT

@Cristian Matei
Thank u Cristian - I will ask Yubico and post the answer here. In this case we might need to use PKI instead.