When using FileVault, and you are logging in, is your login password also the key that decrypts FileVault? And if that’s true, when you turn FileVault on, does it use your login password to seed the encryption? And if that is also true, does it mean that the longer and more random your password is, the stronger the encryption will be? Also, while logging in, does the progress bar represent that decryption is underway?
Just want to have a better understanding of how FileVault works.