Much more interesting is Measured Boot when tying disk encryption to it. Various OSes, including Windows have been supporting this since about forever. And it's so much better: it basically makes no restrictions on what you can run on your PC. All it enforces is: my encrypted disk can only be decrypted if the OS of my choice is booted in the version of my choice. And that's a *way* more powerful concept, because it is *focussed* on your installation, because…