【摘 要】
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We design a practical and provablysecure block ciper over small domain and non-binary inputs,which is also can be considered as a pseudorandom permutation on N
【机 构】
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School of Computer Science and Technology,Huazhong University of Science and Technology,School of So
论文部分内容阅读
We design a practical and provablysecure block ciper over small domain and non-binary inputs,which is also can be considered as a pseudorandom permutation on N elements.Our work is based on a relation we found between the small domain ciper and the negative hypergeometric probability(NHG) distribution.We prove that our block ciper achieves ideal security,that is,it is indistinguishable from a random permutation even if the adversary had already observed N plaintext-cipertext pairs.In particular,we initiate an efficient and sufficiently precise sampling algorithm for negative hypergeometric distribution.
We design a practical and provablysecure block ciper over small domain and non-binary inputs, which is also considered as a pseudorandom permutation on N elements. Your work is based on a relation we found between the small domain ciper and the negative hypergeometric probability (NHG) distribution.We prove that our block ciper achieves ideal security, that is, it is indistinguishable from a random permutation even if the adversary had already observed N plaintext-cipertext pairs.In particular, for negative hypergeometric distribution.
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