title: How to secure a verification system on iPads with QR Codes
body: <p>I have created an iPad application that uses QR Codes for verification. In order to "verify" the document a person must scan an official QR Code. I am worried about the people taking a picture of the QR code and then creating other copies of it. Is there anyway to secure this process? Maybe encrypt the text in the QR Codes? Except that still wouldnt do anything if the person was to create a new one. Any ideas?</p>
  
  <p>More clarification: It is an app that allows students to create hallpasses digitally which are then digitally "signed" or verified by the teacher by scanning a QR Code on the teachers ID. Hopefully the students would be unable to capture the QR Code on the ID but I am trying to add an extra layer of security in case this was to happen. Is this possible?</p>