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Driver signing using cross-signing cert (Windows 7)

Hi,

We have a driver file that is signed with SHA-1 cert (expires 08/20/2021) and cross-signed with a Digicert certificate (expired 04/15/2021). The signature was applied after the cross-cert expiry date.

The driver cert chain is linked to Microsoft Code Verification Root cert through the cross-signing cert in between (screen-shot below).

97702-image.png


This driver installs and loads successfully on Windows 7.

  1.  Is it safe to publish this driver to our users even though it was signed with an expired cross-signing cert? 
    
  2.  Will this driver remain valid forever? 
    
  3.  Can this cross-signing cert be used until 08/20/2021 (expiration of parent sha-1 cert)? 
    


Thank you
Ravi




windows-hardware-certification
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