Backups & restore points · Encryption and passphrases
Does each backup set have its own passphrase?
Short answer: Yes. Each cloud backup set has its own passphrase, kept and checked separately, so changing one never affects another. Drive backups don't need one.
Yes. Each cloud backup set has its own passphrase, set the first time that set backs up to the cloud. Two sets can use the same words if you choose, but each set's passphrase is kept and checked separately — fixing or changing one never affects another.
Backups to a drive don't need one at all. If you keep several cloud sets, write down which passphrase goes with which set.