What are these QR codes and why does the author of this article say this?
> What all can get stolen:
>
> 1.Anything & everything that you have shared via WhatsApp, like
> bank details, passwords, private pics, personal messages, etc.
>
> 2.Your entire contacts list
>
> 3.Your complete chat data
>
> 4.Your personal information
Since whatsapp users do not register using something like username / password the authentication is handled by the app using the sim card and ability to recieve an sms on a given number.
When Whatsapp started whatsapp web, a web client for PC / Mac users, they needed a way to authenticate the users there. This is where the QR code is used. Once the user scans it using the app he authorizes the computer and some tokens are stored in the browsers localStorage.
So when the user is tricked into scanning an arbitrary QR code, they are authorizing the attacker's copy of WhatsApp (or whatever) as an additional device tied to the users account, right?
That makes sense. Sounds like the solution is a warning message in the app. "Do you really want to grant full account access to a new device or service right now?"
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[ 5.4 ms ] story [ 22.4 ms ] threadWhat are these QR codes and why does the author of this article say this?
What's the legit use for these QR codes?When Whatsapp started whatsapp web, a web client for PC / Mac users, they needed a way to authenticate the users there. This is where the QR code is used. Once the user scans it using the app he authorizes the computer and some tokens are stored in the browsers localStorage.
That makes sense. Sounds like the solution is a warning message in the app. "Do you really want to grant full account access to a new device or service right now?"