Cryptanalysis of LOKI91

Cryptanalysis of LOKI91
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DOI:
10.1007/3-540-57220-1_62
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发表时间:
1992-12
期刊:
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影响因子:
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通讯作者:
L. Knudsen
L. Knudsen
中科院分区:
其他
文献类型:
--
作者:
L. Knudsen

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在本文中,我们研究了重新设计的LOKI,LOKI 91提出的[5]。首先,它表明,没有一个特征的概率高到足以做一个成功的差分攻击LOKI 91。其次,我们证明了LOKI 91中F函数的像的大小为8/13×232。最后,我们介绍了一个选择明文攻击,减少了几乎一个因素4使用233+2选择明文的LOKI 91上的穷举密钥搜索。
In this paper we examine the redesign of LOKI, LOKI 91 proposed in [5]. First it is shown that there is no characteristic with a probability high enough to do a successful differential attack on LOKI 91. Secondly we show that the size of the image of the F-function in LOKI 91 is 8/13×232. Finally we introduce a chosen plaintext attack that reduces an exhaustive key search on LOKI 91 by almost a factor 4 using 233+2 chosen plaintexts.