7 Replies Latest reply on Feb 25, 2013 11:32 AM by Steven.Madwin

    Sign with certificate with 'non-repudiation' key usage only

    Innokentiy Ivanov

      Hello,

       

      We are facing a problem validating digital signatures created by our partners with Adobe Reader. When validating the signature, we get the general 'The signer's identity is invalid' error. The Signature properties -> Certificate tab reports a warning "The selected certificate has errors: Not valid for usage".

       

      The key usage extension in the certificate that our partners use for signing contains the only 'non-repudiation' element. Still, the intended usage shown on the certificate summary tab is "Sign document".

       

      The main question is if the problem is related to the specific value of the key usage extension, or it has a different root.

       

      Thanks in advance,

       

      Ken