<div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">WhatsApp doesn’t use SSL for the messages, at least did not last year.</blockquote><div><br></div><div>That was once true but not for some time already:</div><div><br></div><div><a href="http://www.praetorian.com/blog/whats-up-with-whatsapps-security-facebook-ssl-vulnerabilities">http://www.praetorian.com/blog/whats-up-with-whatsapps-security-facebook-ssl-vulnerabilities</a></div><div><br></div><div>Someone published a list of weaknesses in how they used SSL and they were all fixed. They use strong SSL with key pinning now.  </div></div>