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Input languages, which describe the set of valid inputs an application has to handle, play a central role in language-theoretic security, in recognition of the fact that overly complex, sloppily specified, or incorrectly implemented input languages are the root cause of many security vulnerabilities. Often an input language not only involves a language of individual messages, but also some protocol...
Learning techniques allow the automatic inference of the behaviour of a system as a finite state machine. We demonstrate that learning techniques can be used to extract such formal models from software on banking smart cards which - as most bank cards do - implement variants of the EMV protocol suite. Such automated reverse-engineering, which only observes the smart card as a black box, takes little...
This paper introduces the Smart Logic, which is a flexible smart card research tool that gives complete control over the smart card communication channel for eavesdropping, man-in-the-middle attacks, relaying and card emulation. The hardware is available off-the-shelf at a price of about 100 euros. Furthermore, the necessary firm- and software is open source. The Smart Logic provides essential functionality...
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