The Hack received in advance, this Wednesday (14), news that will certainly delight WhatsApp users — the app will work autonomously on up to four different additional devices. This means that you will be able to use the web and desktop version of the messenger even if you are without your main smartphone, as already happens in the competitor Telegram. Testing of the new functionality starts today with a reduced number of users.
“For years, people have asked us to create a true cross-platform experience that allows people to use WhatsApp on other devices without the need for a smartphone connection. Today, we are announcing the launch of a beta test to a limited audience for multi-device access to WhatsApp,” he announced. “With this new feature, you can now use WhatsApp on your phone and up to four other devices simultaneously — even if your phone’s battery runs out.”
According to the company, which is managed by Facebook, each device will communicate with your account maintaining “the same level of privacy and security” that your users already know. “It’s important to note that we’ve developed new technologies to maintain end-to-end encryption while managing the synchronization of your data – such as contact names, chat files, favorite messages and more – between devices,” he explains.
In the old architecture, each user was identified by a key shared between different clients; in the new, each device has its own key. The messenger server maintains a map of the user’s identity and their gadgets, using a technology called Automatic Device Verification to perform identity checks and allow the devices to autonomously establish trust with each other, making life easier for the Internet user.
“Multi-device WhatsApp uses a client-fanout approach, where the WhatsApp client sending the message encrypts and broadcasts it an N number of times to N number of different devices — those in the sender and recipient device lists. Each message is encrypted individually using the paired encryption session established with each device.”, continues the statement.
“Messages are not stored on the server after they are delivered. For groups, we use the same Signal Protocol Sender Key scalable encryption scheme”, explains the company. More information about the novelty can be found on the WhatsApp Help Center official blogpost; the functionality is not yet expected to come out of beta and be released to all users.