What happened when we hacked an expo?
Last year we exhibited at a major information security trade show in London, during the preparation for this we received our exhibitor passes as “print yourself” PDF files. We immediately noticed that there are two forms of barcode here and, interestingly, the QR Code seems quite dense given that all it should be storing is a delegate ID number. Being the inquisitive sort of people that we are, we started up a QR scanner and had a look at its contents.