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Efficient Tweakable Enciphering Schemes From (Block-Wise) Universal Hash Functions

机译:(Block-Wise)通用哈希函数的有效可调整加密方案

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This paper describes several constructions of tweakable strong pseudorandom permutations (SPRPs) built from different modes of operations of a block cipher and suitable universal hash functions. For the electronic codebook (ECB) mode based construction, an invertible blockwise universal hash function is required. We simplify an earlier construction of such a function described by Naor and Reingold. The other modes of operations considered are the output feedback (OFB) mode and a counter-like mode. All the constructions make the same number of block cipher calls and the same number of multiplications. Combined with a class of polynomials defined by Bernstein, the new constructions provide the currently best known algorithms for the important practical problem of disk encryption.
机译:本文描述了可调整的强伪随机置换(SPRP)的几种构造,这些构造是根据分组密码的不同操作模式和适当的通用哈希函数构建的。对于基于电子密码本(ECB)模式的构造,需要一个可逆的块状通用哈希函数。我们简化了Naor和Reingold描述的这种函数的早期构造。考虑的其他操作模式是输出反馈(OFB)模式和类似计数器的模式。所有构造都进行相同数量的分组密码调用和相同数量的乘法。结合Bernstein定义的一类多项式,新构造为磁盘加密这一重要的实际问题提供了目前最著名的算法。

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