Pesign allows users to create their own shim and use their own cryptographic keys. Using this tool, one can create their own trust model and not be required to trust the Microsoft trust model. Once the user has created their keys and signed their shim, and optionally signed and built GRUB and kernel, they can use the setup mode in the firmware to install Fedora and use the sbsetup tool as provided by pesign to enroll their keys in the firmware.