Abstract
In this chapter, we will use the results obtained in Chaps. 15 and 16 in order to prove some security results on Generic balanced Feistel ciphers Ψ k. The main results will be the proof of security for Ψ 4 in KPA, for Ψ 5 in CPA and CCA, and for Ψ 6 in CCA, when q ≪ 2n. We will also see what kind of bound we obtain from the results on Ψ 6 for Ψ k, k ≥ 6, by using some compositions theorem. Finally, at the end of this chapter, we will compare the results obtained with proofs from Mirror theory and H-coefficient technique from the results obtained in Chap. 13 with the coupling technique.
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Nachef, V., Patarin, J., Volte, E. (2017). Proofs Beyond the Birthday Bound on Ψ k with the H-Coefficient Method. In: Feistel Ciphers. Springer, Cham. https://doi.org/10.1007/978-3-319-49530-9_17
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DOI: https://doi.org/10.1007/978-3-319-49530-9_17
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Publisher Name: Springer, Cham
Print ISBN: 978-3-319-49528-6
Online ISBN: 978-3-319-49530-9
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