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Old 12-14-2019, 09:55 PM
zibadun zibadun is offline
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Join Date: Dec 2017
Posts: 7
Authentication with U2F or FIDO2 devices

I was wondering if there are any thoughts about support of U2F protocol in SecurCRT to allow SSH logins using hardware tokens (such us Thetis FIDO https://www.amazon.com/Thetis-Univer.../dp/B06XHTKFH3 ).

These tokens contain a 256 bit EC key and provide a protocol for secure ECDSA signing. I was able to extract the public key from my token using simple python program. Seems that this could provide a secure and convenient logins.
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Old 12-15-2019, 12:33 PM
bgagnon bgagnon is offline
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Join Date: Oct 2008
Posts: 4,596
Hi Zibadun,

We have many customers using recent versions of SecureCRT for CAC/PIV (MFA/U2F) authentication to devices/systems.

See this post about smartcard authentication.

Now I do not know that we have had anyone specifically report getting SecureCRT to work with Fido so I have added this thread to a feature request in our product enhancement database to add support for FIDO U2F authentication. Should a future release of SecureCRT include this feature, notification will be posted here.

If you prefer direct email notification, send an email to support@vandyke.com and include Feature Request - Forum Thread #14009 in the subject line or use this form from the support page of our website.

VanDyke Software
Technical Support
(505) 332-5730

Last edited by bgagnon; 12-15-2019 at 12:52 PM. Reason: added a word for clarifiaction
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Old 12-15-2019, 09:58 PM
zibadun zibadun is offline
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Join Date: Dec 2017
Posts: 7
Hi Brenda

Yes, I'm familiar with the SecureCRT CAPI auth and we use that at work to login with the PIV cards. It works great!

U2F is an alternative, recently added to openssh-portable. I believe the short Key ID is stored in place of the private which is passed to a FIDO device in order to derive the private key. A couple of links with the info:


Thank you for considering this.
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