UPDATED: UEFI Signing Requirements
While Microsoft reserves the right to sign or not sign submissions at its discretion, you should adhere to these requirements. Doing so will help you achieve faster turnaround times for getting a submission signed and help avoid revocation. Microsoft may conduct follow-up reviews, including but not limited to questionnaires, package testing, and other security testing of these requirements before signing. The following list contains the latest requirements for the UEFI signing process. These requirements are to ensure the security promise of secure boot, and to help expedite the turnaround of signing submissions.