8/28/2023 0 Comments Mifare crack tool![]() It was a painful process, but once it was done, the researchers had decoded the security on the chip, unveiling several vulnerabilities. They then reconstructed the circuit using their data, and from the reconstruction, they read the functionality. There are only about 70 different types of gates we ended up writing MATLAB scripts that once we select one instance of a gate finds all the other ones.' To find the cryptographically important regions of the chip, Nohl and Plotz scanned for clues in the blocks: long strings of flip-flops that would implement the register important to the cipher, XOR gates that are virtually never used in control logic, and blocks on the edge of the chip that were sparsely connected to the rest of the chip, but strongly connected to each other. They're all taken from a library of cells.
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