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Title:
Related-Key Differential Slide Attack Against Fountain V1
Authors: Raluca Posteuca
Abstract:The stream cipher FOUNTAIN was introduced in April 2019 as one of the candidates in the NIST lightweight crypto standardization process. In this paper we introduce a slide attack that leads to the construction of 32 relations on key bits, with time complexity around 17\times 2^{80}. The success of the attack is around 98%. We also present some properties of the internal state transitions that allow the identification of (key-iv-ad) input data that produce identical ciphertexts, with probability of 2^{-32}.
ePrint: https://eprint.iacr.org/2019/920
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