Starting Qubes
When turning on SecureDrop Workstation, you will be greeted with a password prompt. This is the full-disk encryption passphrase.
This passphrase protects your entire system. It is of the utmost importance to secure this passphrase. When not using SecureDrop Workstation, shut down the computer completely so as to take advantage of the protections offered by full-disk encryption.
After entering the passphrase, Qubes OS will boot. Log in with the username and password set up by your administrator.