Windows Hello Hardware authenticator vs Windows Hello Software authenticator

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MANIRATHNAM V

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Dec 14, 2023, 5:14:56 AM12/14/23
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I have two windows machine one machine aaguid defined in FIDO MDs data as a Windows Hello Hardware authenticator also attestation type as attca (TPM attestation) and other machine aaguid defined in FIDO MDs data as a Windows Hello Software authenticator also attestation type as basic surrogate (Packed Attestation).my question is in which condition the machines defines as hardware and software authenticator.can anyone please explain this.

Alex Seigler

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Dec 14, 2023, 6:15:06 AM12/14/23
to MANIRATHNAM V, fido...@fidoalliance.org
My organization has seen the same, specifically since 23H2 update, some machines work fine with TPM attestation as before, others are now giving packed or none attestations without x5c. This is preventing registrations with IdP (Okta) that does attestation validation against MDS for the Windows Hello Hardware Authenticator aaguid. We have a case open with MSFT for an explanation. 

-aseigler

From: fido...@fidoalliance.org <fido...@fidoalliance.org> on behalf of MANIRATHNAM V <manira...@gmail.com>
Sent: Thursday, December 14, 2023 5:14:36 AM
To: fido...@fidoalliance.org <fido...@fidoalliance.org>
Subject: [FIDO-DEV] Windows Hello Hardware authenticator vs Windows Hello Software authenticator
 
I have two windows machine one machine aaguid defined in FIDO MDs data as a Windows Hello Hardware authenticator also attestation type as attca (TPM attestation) and other machine aaguid defined in FIDO MDs data as a Windows Hello Software authenticator also attestation type as basic surrogate (Packed Attestation).my question is in which condition the machines defines as hardware and software authenticator.can anyone please explain this.

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