Open swipe toolkit pdf417 barcode reader, available to download in the last step, and load your barcode into it. Edit the barcode so that it is exactly 2000 or less pixels long because that is the maximum the program will allow, and save it. Most states use the PDF-417 (Portable Data File, with 17 modules each containing 4 bars and spaces, thus 417). The 2d barcode is the one on the bottom in the picture. Open up the image in Photoshop and cut out the 2d barcode. The resolution should be set so that the 2d barcode is about 2000 pixels long. Scan the back of your license / permit using a medium - high resolution. Personally I don't care, but theres probably some good reasons why I should not let it out so I'm just being safe. All the times my license (well technically my permit, but its all the same) appears, I mess up the barcodes a bit so (hopefully) no one can get my information. I'm pretty sure that just decoding the barcode is not illegal, but some of the other things I describe probably are, so let those be just proof of concept. Using a cool little program I dug up on the web, and a scanner I was able to decode the barcodes on the back of my NY drivers license, and find out what information people get when they scan it.
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