… Not even WhatsApp’s employees can read the data. On any phone that runs.the latest version of.the app, from iPhones to Android phones to Windows phones to old school Nokia flip phones. … All messages, phone calls, photos, and videos. The enigmatic founders.Brian Acton and Jan Koum, together with a.cryptographer who goes by.Moxie Marlinspike, revealed that added end-to-end encryption to on its service. In Whatsapp, it displays a message that the key has changed, re-encrypts the message, and delivers it.WhatsApp, an online messaging service.owned by tech giant Facebook.has grown into one of the world’s most important applications. On the Signal app, this would cause an already sent message to fail, and the sender to be notified of a change before it could be attempted again. He claims that the server (potentially at the direction of a government agency) could generate a new key for one of the parties, and pretend to be them before the person on the other end is notified that something has changed. The Guardian's report is based on research by Tobias Belter.

Users can ensure their communication is secure by checking the security code displayed on each end, if it matches, then they can be sure their messages aren't subject to a man-in-the-middle (MITM) attack by a third party. Because people change phones, or uninstall and reinstall apps, the pair of keys can change. Based on its Signal Protocol (also used for encrypted messaging in Google's Allo), each client is identified by a public key that's shared with other people, and a private key on the device.

Whatsapp's secure messaging was implemented with help from Open Whisper Systems - makers of the secure messaging app Signal - and on its blog, the company explains how things work. Whatsapp, and the people who helped design the implementation for its secure messaging, state this isn't the case, and instead, reflects a user experience design decision that isn't putting users at risk. Now, a report by The Guardian cites a security researcher claiming that its implementation is open to being backdoored or hijacked by government agencies. Last spring, Whatsapp announced that every message on its service is delivered with end-to-end encryption, meaning no one, not even Whatsapp, can tell what's inside.

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