Differential Fault Analysis of Secret Key Cryptosystems
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Differential Fault Analysis of Rabbit
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Multimedia Tools and Applications
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Although Differential Fault Analysis (DFA) led to powerful applications against public key [15] and secret key [12] cryptosystems, very few works have been published in the area of stream ciphers.In this paper, we present the first application of DFA to the software eSTREAM candidate Rabbit that leads to a full secret key recovery. We show that by modifying modular additions of the next-state function, 32 faulty outputs are enough for recovering the whole internal state in time $\mathcal{O}\left( 2^{34}\right)$ and extracting the secret key. Thus, this work improves the previous fault attack against Rabbit both in terms of computational complexity and fault number.