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Published in:
2015 | OriginalPaper | Chapter
Meet-in-the-middle Attack with Splice-and-Cut Technique on the 19-round Variant of Block Cipher HIGHT
Authors : Yasutaka Igarashi, Ryutaro Sueyoshi, Toshinobu Kaneko, Takayasu Fuchida
Published in: Information Science and Applications
Publisher: Springer Berlin Heidelberg
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We show a meet-in-the-middle (MITM) attack with Splice-and-Cut technique (SCT) on the 19-round variant of the block cipher HIGHT. The original HIGHT having 32-round iteration was proposed by Hong et al. in 2006, which applies the 8-branch Type-2 generalized Feistel network (GFN) with 64-bit data block and 128-bit secret key. MITM attack was proposed by Diffie and Hellman in 1977 as a generic method to analyze symmetric-key cryptographic algorithms. SCT was proposed by Aoki and Sasaki to improve MITM attack in 2009. In this paper we show that 19-round HIGHT can be attacked with 2
8
bytes of memory, 2
8
+ 2 pairs of chosen plain and cipher texts, and 2
120.7
times of the encryption operation by using MITM attack with SCT.