We've known WhatsApp would be enabling 2-factor authentication for many months now, but the functionality has only just gone live in some of the latest beta versions of the app (2.16.341 and above, maybe even earlier).

If you head over to your account settings in WhatsApp, you'll see a new Two-step verification option. Tap it to get to a screen that explains what 2-step verification is and get the option to enable it.

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