WhatsApp to Let Users Encrypt Chat Backups Uploaded to iCloud

WhatsApp has announced it will give its two billion users the option to upload their chat backups to Apple's iCloud using password-protected encryption.
Currently, WhatsApp on iPhone lets users back up their chat history to ‌‌iCloud‌‌, but messages and media that users back up aren't protected by WhatsApp's end-to-end encryption while in ‌‌Apple's cloud servers‌.Given that Apple holds the encryption keys for ‌iCloud‌, a subpoena of Apple or an unautho