WhatsApp has announced that it is rolling out 2 step verification to everyone on its app and this includes iOS, Android and Windows Phone.
You will now be able to create a six digit passcode that you will need to use when your phone number is being verified by the app, this adds a extra layer of security.
If you have two-step verification enabled, your number will not be permitted to reverify on WhatsApp within 7 days of last using WhatsApp without your passcode. Thus, if you forget your own passcode, but did not provide an email to disable two-step verification, even you will not be permitted to reverify on WhatsApp within 7 days of last using WhatsApp. After these 7 days, your number will be permitted to reverify on WhatsApp without your passcode, but you will lose all pending messages upon reverifying – they will be deleted. If your number is reverified on WhatsApp after 30 days of last using WhatsApp, and without your passcode, your account will be deleted and a new one will be created upon successfully reverifying.
You can find out more details about 2 step verification on WhatsApp over at their website at the link below.