"Apple does/does not store or provide access to encryption keys or plaintext of content uploaded to iCloud services"
This "support" page says nothing at all about what is actually encrypted vs. faux-encrypted.
Note that it is not apparent whether some of data listed under "end-to-end encrypted" is also included with iCloud Backups.
after reading the link, it seems that as long as i do not have iCloud enabled for messages, no matter what other services i have enabled iCloud enabled for, i'm OK - for example, i do have photo iCloud backup enabled.
can anyone confirm that's what happens?
>Messages in iCloud also uses end-to-end encryption. If you have iCloud Backup turned on, your backup includes a copy of the key protecting your Messages. This ensures you can recover your Messages if you lose access to iCloud Keychain and your trusted devices. When you turn off iCloud Backup, a new key is generated on your device to protect future messages and isn't stored by Apple.
Edit: I'm not familiar with this beyond previous discussion on hn, so could be wrong.