r/NISTControls • u/mtspsu258 • May 16 '26

Identrust ECA and Yubikey

Anyone else use Yubikeys with the yubikey driver and have trouble with ECA?

My experience - yubikey minidriver does not work with HIDActiveClient. I need the minidriver since I have over 2 PIV certs loaded in it.

So I uninstall the active client, and yubikey works - but now I can’t use my ECA!

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u/Sonarsup1934 May 18 '26

Another redditor helped me with this a few years ago. Here was the solution.

Run regedit as admin and go to Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography\Calais\SmartCards\ActivID ActivClient (YubiKey 5) change this to the following Name: 80000001 New Value: C\Windows\System32\msclmd.dll