This is one of the major criticisms of WhatsApp’s security model. Also, it does not encrypt the metadata which is used to carry communication between two endpoints. It’s also noteworthy that even though all your communication on WhatsApp uses E2E encryption, the company does not encrypt backups (cloud and local). That’s a good thing, because the Signal protocol is open source, widely peer-reviewed, and is generally considered one of the best protocols for implementing end-to-end encryption in messaging platforms. That said, it’s noteworthy that WhatsApp uses the E2E protocol developed by Open Whisper Systems, which is the name behind Signal messenger. WhatsApp can’t decrypt the contents of your messages, calls, photos, etc, thus ensuring your security and privacy. What that means, is that you and the recipient are the only people who can read the messages you send to them. So all your messages, video calls, voice calls, photos, and anything else you share is end-to-end encrypted on WhatsApp. Plus, E2E on WhatsApp is available on every single mode of communication that the app enables. One thing that WhatsApp definitely has going for it is its end-to-end encryption.
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