By Friedheld Hinz (auth.), J. Dassow, J. Kelemen (eds.)

ISBN-10: 354051516X

ISBN-13: 9783540515166

The quantity comprises chosen contributions from the clinical programme of the fifth foreign assembly of younger desktop Scientists (IMYCS '88) held at Smolenice citadel (Czechoslovakia), November 14-18, 1988. it's divided into 5 chapters which process the 3 the most important notions of up to date theoretical computing device technology - machines, languages, and complexity - from diverse views. the 1st bankruptcy includes contributions facing difficulties of decidability, hierarchy, and complexity. Papers relating differing types and difficulties of automata idea shape the second one bankruptcy. The contributions within the 3rd bankruptcy disguise the massive box of algorithmics from the learn of application complexity to the area of computational geometry. the 2 contributions of the fourth bankruptcy are dedicated to common sense programming and inductive inference. the ultimate bankruptcy bargains with difficulties of cryptography and comprises the textual content of the IMYCS '88 instructional on cryptography and information safety added by means of A. Salomaa. The publication may be an invaluable resource for orientation in modern theoretical computing device technology and comparable fields resembling software program engineering and synthetic intelligence for researchers and graduate students.

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Extra resources for Machines, Languages, and Complexity: 5th International Meeting of Young Computer Scientists Smolenice, Czechoslovakia, November 14–18, 1988 Selected Contributions

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Nd a flaw in the security proofs of GCM given by McGrew and Viega in [13]. The main problem is that inc may be translated to multiple distinct forms in terms of exclusive-ors, such that the equation incr1 (GHASHH (N a )) = incr2 (GHASHH (N b )) (2) may have many more solutions than the desired lN + 1 for any given r1 , r2 , N a and N b , where 0 ≤ r1 , r2 ≤ 232 − 2, N a = N b , and lN is the maximum number of blocks for nonces. Result 3 ([8]). For a randomly chosen H, the probability for the equation (2) to hold is at most 222 (lN + 1)/2128 .

ASIACRYPT 2006. LNCS, vol. 4284, pp. 396–411. Springer, Heidelberg (2006) 23. : Generic Attacks on Unbalanced Feistel Schemes with Expanding Functions. In: Kurosawa, K. ) ASIACRYPT 2007. LNCS, vol. 4833, pp. 325–341. Springer, Heidelberg (2007) 24. : Unbalanced Feistel Networks and Block Cipher Design. In: Gollmann, D. ) FSE 1996. LNCS, vol. 1039, pp. 121–144. Springer, Heidelberg (1996) 25. : Generic Attacks on Feistel Networks with Internal Permutations. In: Preneel, B. ) AFRICACRYPT 2009. LNCS, vol.

With more than one element) of authentication keys are weak key classes, if the final masking by block ciphers is computed additively. This is an extension to previous analysis of Procter and Cid. – Based on a special structure of GCM, we show how to turn these forgery attacks into birthday-bound based attacks by attacking the encryption oracle instead of the verification or decryption oracle. This can significantly increase success probabilities and avoid certain countermeasures. – We provide a method to fix GCM in order to avoid the security proofs’ flaw discovered by Iwata et al.

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Machines, Languages, and Complexity: 5th International Meeting of Young Computer Scientists Smolenice, Czechoslovakia, November 14–18, 1988 Selected Contributions by Friedheld Hinz (auth.), J. Dassow, J. Kelemen (eds.)

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