1993 | ReviewPaper | Buchkapitel
Cryptanalysis of LOKI 91
verfasst von : Lars Ramkilde Knudsen
Erschienen in: Advances in Cryptology — AUSCRYPT '92
Verlag: Springer Berlin Heidelberg
Enthalten in: Professional Book Archive
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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.