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A comment on Google’s Secret China Project “Effectively Ended” After Internal Confrontation. Parent comment

Re:Google’s Secret China Project “Effectively Ended” After I... by patrickaljord on Monday December 17, 2018 @06:19PM (#18703190)
Last time I checked, if I forget my iCloud password, Apple can send me a new one. This means Apple holds the private key to decrypt whatever I store on iCloud. iMessages on my phones are encrypted though but that's not what OP was talking about.
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Re:Google’s Secret China Project “Effectively Ended” After I... by stock_toaster on Monday December 17, 2018 @07:44PM (#18703651)
If iCloud backup is disabled, the device-specific-messages-key is not stored in icloud.

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

> 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.

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