&gt;“General speaking, we can make [a barcode scanner] to &#x27;type&#x27; any keys to the host system, not only the 0-9 and a-z,” Yu said. He claims this lets someone create a boarding pass to “execute any command on computer.”<p>At a guess, they encoded Win+R cmd &lt;enter&gt; into a barcode. It&#x27;s a neat trick with big potential.