Facebook explains how WhatsApp end-to-end encrypted backups work
On September 10, 2021, WhatsApp end-to-end encrypted backups for Android and iOS devices is officially announced. This feature allows you to further strengthen and protect the privacy of message backups. The Facebook-owned WhatsApp has provided end-to-end encrypted messages for a while now, although that additional security has not been used for backups in the past.
It also does not apply to the media and relies on encryption services provided by a cloud provider that backs up the service. Those cloud providers can explain them and if there is a need that has arisen, and to know privacy, that is obviously very small.
The company has begun testing hidden end-to-end backups in the beta version of WhatsApp, and now, before its extensive release, Facebook has explained exactly how those encrypted backups work.
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How WhatsApp’s end-to-end encrypted backups work
Facebook says it has launched a completely new end-to-end encryption system that works on both iOS and Android. Backups are encrypted with a unique, random key, and the key can be saved manually or by a password.
If the user wants to keep your password, they can access the Hardware-security-module-based Backup Key Vault to retrieve their encryption key and delete the backup.
This vault is responsible for enforcing password verification attempts and providing the key to permanent access after many unsuccessful attempts to recover it. This prevents power attacks, and WhatsApp will never know the key.
Storing keys in the Backup Key Vault
WhatsApp uses an earlier service called ChatD, which manages customer communication and customer authentication. It will apply a protocol that sends backup keys to and from WhatsApp servers, as well as the client and key vault exchange encrypted messages.
Backups are performed as a continuous stream of encrypted data – e.g., the encryption key can be used to decrypt it. Once encrypted, backups can be stored anywhere outside the site, including Google Drive or iCloud.
Facebook says to help address the number of users who rely on WhatsApp, the main vault service will be distributed geographically across all data centers once completed. Facebook also released two graphics that show how end-encryption works when you use a key to delete your backup, or when you use a user password to clear your encryption.
Here’s the encryption and decryption process when using a password
If the account owner uses a password to access their backup, then it will work via the following process to retrieve the key from the key vault.
- They enter their password, which is encrypted and then verified by the Backup Key Vault.
- Once the password is verified, the Backup Key Vault will send the encryption key back to the WhatsApp client.
- With the key in hand, the WhatsApp client can then decrypt the backups.
If the 64-bit key alone is what’s being used, then the user will need to manually save and enter the key themselves.
WhatsApp has pushed a new beta update for Android users, which brings a camera shortcut directly to the gallery sheet to make it easier to access the camera while sending photos or videos. The fresh beta update arrives with version 2.24.24.23, available through the Google Play Beta Program.
Previously, WhatsApp improved the way users send photo and video albums. With that, users can select multiple photos and videos at once, and add captions to entire albums to make it simpler to share media with context.
The new update is adding even more improvements. The camera shortcut, which used to be in the chat bar, is now available directly inside the gallery sheet. It saves time and makes it easier to capture something new without navigating through multiple steps.
Now, when you’re selecting photos or videos to send, you can quickly switch to the camera without leaving the gallery. This new change might feel like an extra step for some users who were used to accessing the camera with a single tap from the chat bar. However, the update aims to combine both the camera and gallery functions into one place.
Notably, not all users will see this new camera shortcut. If you still have the camera shortcut in the chat bar, you won’t see the one in the gallery sheet. This is to avoid clutter and make the app more organized.
This feature is currently available to a limited number of beta testers, and it will be rolled out to more users in the coming days or weeks.
WhatsApp is bringing a fun new feature to its app just in time for New Year celebrations. The latest update for WhatsApp beta users arrives with version 2.24.24.17, which introduces animated confetti reactions for certain emojis.
At the moment, the animated confetti emoji reactions are available to some WhatsApp beta testers on Android. It will likely be rolled out to everyone in the coming week with the stable update, obviously, ahead of the new year.
The fresh beta update adds a playful twist to your reactions. When you use the Party Popper, Partying Face, or Confetti Ball emojis to react to a message, colorful confetti will burst out of the emoji to create a lively and celebratory animation.
The confetti animation is powered by Lottie, a framework that helps create smooth and high-quality animations. This ensures the effects don’t slow down the app or use too much memory to make it run smoothly without affecting performance.
The new feature is perfect for marking moments of joy or sharing the excitement of the holiday season. If you’re a beta tester, you can try it out by reacting to a message with one of the festive emojis and watching the confetti burst to life.
WhatsApp introduces camera and gallery shortcuts in chat bar
WhatsApp is rolling out a new update for beta testers with version 2.24.24.16, which brings new shortcuts to the chat interface. This update introduces a gallery shortcut to make it easier to share photos and videos from your phone directly within chats.
WhatsApp recently replaced the camera shortcut in the chat bar with a gallery button for beta users. While this change allowed users to quickly share stored photos and videos, many users missed the camera shortcut, which gave them fast access to the camera for capturing moments on the spot.
Based on feedback, WhatsApp has decided to bring back both shortcuts in the chat bar. Now, users will see two buttons in the chat interface – one for quickly taking a photo or video using the camera and another for browsing and sharing photos or videos from their gallery.
These two shortcuts for the chat interface of WhatsApp make it quicker to share photos or capture new ones, without having to navigate through extra menus.
This feature is still in beta, so it’s available to only some testers right now. The feature will gradually be rolled out to more users in the coming weeks
WhatsApp is collecting feedback to see if the new dual shortcut setup improves the experience or if it feels cluttered. If you are testing beta on WhatsApp, install the latest version now.