WhatsApp switches on end-to-end encryption

guest · Oct 11, 2021

[Update: Rolling out] WhatsApp adds end-to-end encryption for Android cloud backups
October 11, 2021
https://9to5google.com/2021/10/11/whatsapp-adds-end-to-end-encryption-for-android-cloud-backups/

After being hinted at and after testing in previous beta builds, WhatsApp has confirmed that end-to-end encryption for cloud backups is set to roll out soon.
[Update 10/11]: After being officially announced, WhatsApp’s long-awaited encrypted backups are now beginning to roll out with the latest beta update for the Android and iOS apps. As the original post (below) notes, you’ll need to choose between a password or 64-bit key. Losing either will result in your backup being lost — be that on Android or iOS.

Spotted by WABetaInfo, the option is said to be available as of v2.21.21.5 of WhatsApp for Android. However, after updating we’re not yet seeing the option when heading to Settings > Chats > Chat backup. This hints that the feature is not yet widely available but likely coming very soon to most users of the messaging platform.
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guest · Oct 14, 2021

mood said: ↑

[Update: Rolling out] WhatsApp adds end-to-end encryption for Android cloud backups October 11, 2021
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WhatsApp rolls out end-to-end encrypted Google Drive, iCloud backups
October 14, 2021
https://www.androidcentral.com/whatsapp-brings-end-end-encryption-google-drive-chat-backups

Facebook says it created an all-new system for encryption key storage to make end-to-end encryption possible for backups on both Android and iOS
When you choose to use a password, the encryption key is stored in a Backup Key Vault that is "built based on a component called a hardware security module — specialized, secure hardware that can be used to security store encryption keys." You can access the backup using your encryption key or your personal password to retrieve the key from the Backup Key Vault.

The encryption key will be rendered permanently inaccessible after a "minimal number" of unsuccessful attempts to access it. This, Facebook says, will help prevent brute-force attempts to retrieve the key.
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Update, Oct 14 (17:15 ET) ― End-to-end encryption now available
Facebook announced on Thursday that WhatsApp begins rolling out end-to-end encrypted backups today. The blog post indicates that Facebook will start "rolling this feature out slowly" to its more than 2 billion users, so it may take some time to reach your device.

You can check for the feature in the latest version of WhatsApp by navigating to Settings > Chats > Chat Backup, where you'll see an option for end-to-end encryption.
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