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Introduction

This repository complements the research documented in the paper `Hitag 2 Hell - Brutally optimizing guess-and-determine attacks', as presented at USENIX WOOT2018.

Pseudocode

  • maskgen.py: generate masks for which bits to guess in each layer

  • naive.py: naive guess-and-determine implementation

  • unrolled.py: naive implementation which is unrolled

  • tabled.py: implementation which avoids impossible guesses

  • tabled_buffered.py: implementation which avoids impossible guesses, and tries to mitigate the intense cache pressure

  • memoized.py: implementation which applies memoization

  • generate_memoized_python.py: generator for memoized_gen.py

  • memoized_gen.py: generated code from generate_memoized_python.py, used in memoized.py

  • complexity.py: compute complexity at each layer

  • hitag2.py: HITAG2 implementation

Implementations

Our best implementations from the research, as featured in the paper's appendix verbatim, are also included here for ease of use.

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