[dannyw]

The new iMessages in the Cloud claims to be 'end to end encrypted', which is true, but omit the fact that a copy of the key is stored with Apple in your iCloud backup...

https://support.apple.com/en-us/HT202303

"Messages in iCloud also uses end-to-end encryption. If you have iCloud Backup turned on, a copy of the key protecting your Messages is included in your backup"

Given that almost everyone has iCloud backup enabled, messages are certainly retrievable with a simple court order.

[eridius]

Good to be aware of, but¹ Messages in iCloud is off by default².

¹At least for existing users.

²And almost certainly requires opt-in for new users as well.

[saagarjha]

Messages in iCloud is end-to-end encrypted. It's iCloud Backup that has issues.

[ex3ndr]

Backups are encrypted.

[saagarjha]

I believe the argument was that they're encrypted with keys that Apple has access to.