Consumer B Gone - Shopping Cart Antitheft System Gone Wrong
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Presented at SOURCE Barcelona 2009 by
Embedded systems are used in increasingly weird places for security controls. Shopping carts seems to be a place where security systems were deployed without much concern for their tweakability and hackability. We'll see in this talk how we managed to reverse engineer this system with very low tech tools that can be applied to so many radio- frequency applications. We will also show how to use side-effects of common components in computers and mobile phone in order to recreate a radio-frequency (first time to our knowledge) without any soldering or hardware tweaking, and specifically to trigger the locking and unlocking mechanism with any mobile phone. We will then see how these techniques can be adapted to much bigger security systems and provide guidance to decision making in security design.