By Jean Goubault-Larrecq (auth.), Anupam Datta (eds.)

ISBN-10: 3642106218

ISBN-13: 9783642106217

This ebook constitutes the refereed court cases of the thirteenth Asian Computing technology convention, ASIAN 2009, held in Seoul, Korea, in December 2009.

The 7 revised complete papers and three revised brief papers provided including 2 invited talks have been conscientiously reviewed and chosen from forty five submissions. concentrating on the speculation and perform of knowledge safety and privateness, the papers contain issues of deducibility constraints, symmetric encryption modes, dynamic defense domain names and rules, cryptography, formal verification of quantum courses, determination of static equivalence, authenticated message and proxy signature scheme.

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Extra info for Advances in Computer Science - ASIAN 2009. Information Security and Privacy: 13th Asian Computing Science Conference, Seoul, Korea, December 14-16, 2009. Proceedings

Sample text

Our work continues that line of work. We extend the input language and axioms of the Hoare logic of [8] in order to capture symmetric encryption modes. Outline: In Section 2 we introduce the material for describing the encryption modes. In Section 3, we present our Hoare Logic for analyzing the semantic security of encryption modes described with the grammar given in the previous section. Finally before concluding in the last section, we apply our method to some examples in Section 4. 1 Definitions Notation and Conventions For simplicity, over this paper, we assume that all variables range over large domains, whose cardinality is exponential in the security parameter η.

Lemma 4. Let D be a constraint system that is uniquely determined and D be such that D D . Then D is uniquely determined. Using our transformation rules, solving deducibility constraint systems can be reduced to solving simpler constraint systems that we call solved. Definition 7. H1 x1 ∧ . . ∧ Hn solved form when x1 , . . , xn are distinct variables. xn is in Solved deducibility constraint systems are particulary simple since they always have a solution. Lemma 5. A solved form has always at least one solution.

H x1 ∧ H x2 | x = x1 , x2 ] ... First, we do not aim at explictly enumerating all possible solutions, but only compute solved forms, that are a convenient representation of all these solutions. Typically, H v will be solved when v is a variable. This rules out the second above non-terminating example. For decomposition or versatile rules, we may still get the first non-terminating behavior. That is where we use locality: we control the application of such rules, roughly requesting that maximal premises are subterms of H.

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Advances in Computer Science - ASIAN 2009. Information Security and Privacy: 13th Asian Computing Science Conference, Seoul, Korea, December 14-16, 2009. Proceedings by Jean Goubault-Larrecq (auth.), Anupam Datta (eds.)

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