The Block Cipher SC2000
نویسندگان
چکیده
In this paper, we propose a new symmetric key block cipher SC2000 with 128-bit block length and 128-,192-,256-bit key lengths. The block cipher is constructed by piling two layers: one is a Feistel structure layer and the other is an SPN structure layer. Each operation used in two layers is S-box or logical operation, which has been well studied about security. It is a strong feature of the cipher that the fast software implementations are available by using the techniques of putting together S-boxes in various ways and of the Bitslice implementation.
منابع مشابه
A Differential Attack on Reduced-Round SC2000∗ NES/DOC/UIB/WP3/008/1
SC2000 is a 128-bit block cipher with key length of 128, 192 or 256 bits, developed by Fujitsu Laboratories LTD. For 128-bit keys, SC2000 consists of 6.5 rounds, and for 192and 256-bit keys it consists of 7.5 rounds. In this paper we demonstrate two different 3.5-round differential characteristics that hold with probabilities 2−106 and 2−107. These characteristics can be used to extract up to 3...
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We analyze the security of the SC2000 block cipher against both differential and linear attacks. SC2000 is a six-and-a-half-round block cipher, which has a unique structure that includes both the Feistel and Substitution-Permutation Network (SPN) structures. Taking the structure of SC2000 into account, we investigate oneand two-round iterative differential and linear characteristics. We present...
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In this work we present analysis for the block cipher SC2000 , which is in the Japanese CRYPTREC portfolio for standardization. In spite of its very complex and non-linear key-schedule we have found a property of the full SC2000-256 (with 256-bit keys) which allows the attacker to find many pairs of keys which generate identical sets of subkeys. Such colliding keys result in identical encryptio...
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The block cipher SC2000 was recently proposed by a research group of Fujitsu Laboratories as a candidate cipher for the CRYPTREC and NESSIE projects. The cipher was designed so that it would be highly flexible and fast on many platforms. In this paper we show that the cipher is really fast on the Pentium III and AMD platforms: Our C implementation of SC2000 on Pentium III is only second to the ...
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Executive Summary This report presents the results of a limited time evaluation of the block cipher SC2000. The evaluation consisted of theoretical derivations and practical experimentations. No flaws nor weaknesses have been identified in the design which could lead to cryptanalytic attacks with respect to the state-of-the-art. However, the design is complicated and uses components which do no...
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