The backups are unencrypted as highlighted in the UI (if I recall correctly). They re-generate the keys when you switch phones / re-install / clear data. That's when you get to see the "XYZ's security code changed" service message
I guess it makes sense. Doesn't make a difference if you deliver the chest with the key to the lock or the chest without the lock.
> For example, if you use a data backup service integrated with our Services (like iCloud or Google Drive), they will receive information you share with them, such as your WhatsApp messages.
