24C3: Toying with barcodes

Speaker: FX of Phenoelit


Jemandem einen Strich auf die Rechnung machen


The talk focuses on 1D and 2D barcode applications with interference possibilities for the ordinary citizen. Ever wondered what is in these blocks of squares on postal packages, letters and tickets? Playing with them might have interesting effects, reaching from good old fun to theft and severe impact.

Barcodes have been around for ages, but most of the time were used as simple tags with a number. The rise of 2D barcodes started to put them into customer hands as authentication, authorization, payment method and other arbitrary data transport. The implicit trust in them is enormous. The talk gives a very quick intro into barcodes and then proceeds to review the contents of selected samples, including their usage in the real world. This is going to be fun, tool release included.

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