> Apple has had iCloud backup for some time now, including cloud camera rolls. I believe Apple have the ability to read any data in an iCloud backup. The data

> Apple has had iCloud backup for some time now, including cloud camera rolls. I believe Apple have the ability to read any data in an iCloud backup. The data on my phone include my password file, encrypted with an easy-to-type-on-a-screen-keyboard password, which means that it's not a high-entropy password. There's no way that I would allow a cloud provider access to that file. Note, Apple do say on https://support.apple.com/en-us/HT202303 https://support.apple.com/en-us/HT202303 that it's all end-to-end encrypted and they cannot read the backup, but they also say 'To access your data on a new device, you might have to enter the passcode for an existing or former device,' which implies that if one loses a device then one can buy a new device and enter the old device's passcode — which means that Apple themselves could just try passcodes iteratively. If it's possible for you to restore data from a lost device without typing in a high-entropy password, then it's possible for Apple to read the data without guessing a high-entropy password.