Further guidance for using the new Authentication certificate will be announced via ALCOAST by April 2020. Great, your PIV-Auth (Authentication) Certificate is now activated (added to your CAC)! No further action is required at this time. 12) The PIV Update window displays ^Your CAC has been successfully updated. The Identity certificate is set as the default certificate on the new CAC cards and users need the Digital Signature certificate as the. New CAC (PIV) cards may require reset of default certificate.