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Old Oct 19, 2012, 2:09 pm
  #5  
colpuck
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Originally Posted by drewguy
Wait - if hacking a barcode is this easy for PreCheck, why isn't it just as easy to hack a barcode for the entire boarding pass? Surely they have some sort of encryption or checkdigit equivalent for the barcode that would spit it out as invalid because it doesn't conform to the algorithm.
It is possible. I wasn't able to identify the
11F>30B
string in the barcode information. This maybe a CheckSum code. However, it doesn't matter. Not all boarding passes are scanned at the TSA checkpoint. The photoshop hack from like 5 years is still valid.
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