&gt; What&#x27;s wrong with the QR code? That QR code is a hash of the public key<p>I have no way to verify that.<p><i>If</i> WhatsApp is trustworthy and secure, then the QR code might be a hash of the public key, but to be completely frank, it could be anything.<p>* I don&#x27;t have the source code.<p>* Nobody I know has the source code<p>* Nobody I know has bothered to jailbreak their device and&#x2F;or decompile the binary. I just got an update recently, and my friends are busy.<p>If I had access to my own public and private key, I (or someone I know) could conceivably verify that I&#x27;m using it by decrypting my messages using another device (e.g. using wireshark).<p>I appreciate that you might have the source code, or know someone with the source code, or might have reverse engineered the most recent update and have more confidence than I do, <i>but you cannot</i> transmit that confidence to me by simply insisting that it is the hash of the public key.