Higher Order Differential Attack on 6-Round MISTY1 TSUNOO, Yukiyasu; SAITO, Teruo; NAKASHIMA, Hiroki ...
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences,
2009/01/01, 2009-00-00, 20090101, Letnik:
E92.A, Številka:
1
Journal Article
Recenzirano
MISTY1 is a 64-bit block cipher that has provable security against differential and linear cryptanalysis. MISTY1 is one of the algorithms selected in the European NESSIE project, and it has been ...recommended for Japanese e-Government ciphers by the CRYPTREC project. This paper reports a previously unknown higher order differential characteristic of 4-round MISTY1 with the FL functions. It also shows that a higher order differential attack that utilizes this newly discovered characteristic is successful against 6-round MISTY1 with the FL functions. This attack can recover a partial subkey with a data complexity of 253.7 and a computational complexity of 264.4, which is better than any previous cryptanalysis of MISTY1.
Parameters for evaluating the swallowing function include the larynx's upward and forward amount of movement, the time from the start of swallowing to the maximum rise. Now, only one system the ...Swallowing video fluoroscopic examination of swallowing(VF) can get parameters quantitatively. But, to Quantify with VF , health care workers have to work so hard. So , we developed NESSiE Non-contact Measurement System for swallowing function. We describe how to verify the larynx's upward whether NESSiE works correctly by comparing VF . And,We found that the first example include error within ±3mm that is target.
Cette thèse étudie la construction automatique de représentations sémantiques comme lambda-termes simplement typés. Nous introduisons la sémantique formelle et computationnelle et présentons une ...tentative de construction sémantique à l'aide d'outils d'inférence. Nous expliquons les limites de cette approche et en proposons une autre, basée sur un outil appelé Nessie. Cet outil construit des représentations sémantiques grâce à un lexique spécifiant le sens des mots et à un arbre guidant la construction. L'implantation de l'outil est présentée et ses résultats sont comparés à ceux du système évoqué plus haut. Nous appliquons ensuite Nessie à deux tâches différentes. D'abord, nous montrons comment il peut être utilisé (avec des outils d'inférence) pour étudier la sémantique du temps et de l'aspect des verbes polonais. Ensuite, nous présentons deux approches de la construction compositionnelle du sens de discours basées sur la théorie des types. Nous montrons que Nessie peut être utilisé pour calculer des représentations de discours dans ces deux formalismes; cette double implantation permet de souligner les points forts et les points faibles de chacune et de les comparer. Enfin, nous prouvons que notre approche de la construction sémantique est compatible avec une large gamme de formalismes syntaxiques: ceux reconnus par une grammaire catégorielle abstraite d'ordre 2. Une conséquence de cette caractérisation est que Nessie peut gérer une large gamme de grammaires inversibles et peut donc, théoriquement, être utilisé aussi bien en génération qu'en analyse. Nous concluons en discutant de la pertinence du lambda calcul simplement typé pour la sémantique des langues naturelles.
This thesis discusses the automatic construction of semantic representations as simply typed lambda termes. We introduce non-formal and formal semantics and present one attempt to build semantic representations with the help of reasonning tools. We explain why we find this approach limited and propose our own, at the heart of which is a tool called Nessie. This tool builds semantic representations using a lexicon specifying representations for words and a tree to guide semantic consruction. We present the implementation of this tool in detail, and compare its results with an earlier systme. We then apply Nessie to two different tasks. First we show how it can be used (in conjunction with inference tools) to study the semantics of tense and apsect of Polish verbs. Second, we present two different type-theoretic approaches to the compositional computation of discourse semantics. We show that Nessie can be used to compute discourse representations in both formalisms; this dual implementation enables us to evaluate the strong points and weak points of both approaches, and to make a comparison. Finally, we prove that our approach to semantic construction is compatible with a wide range of grammatical formalisms, namely those which can be expressed in terms of an abstract categorial grammar of order 2. One consequence of this characterisation is that Nessie can handle a large range of invertible grammars and hence is compatible with generation as well as analysis. We conclude by discussing the adequacy of simply typed lambda calculus for natural language semantics.
The latest cryptographical applications demand both high speed and high security. In this paper, an architecture and VLSI implementation of the newest powerful standard in the hash families, ...Whirlpool, is presented. It reduces the required hardware resources and achieves high-speed performance. The architecture permits a wide variety of implementation tradeoffs. The implementation is examined and compared in the security level and in the performance by using hardware terms. This is the first Whirlpool implementation allowing fast execution, and effective substitution of any previous hash families' implementations such as MD5, RIPEMD-160, SHA-1. SHA-2 etc, in any cryptography application.
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