Download PDF by Michael Lehmann, Willi Meier (auth.), Josef Pieprzyk,: Cryptology and Network Security: 11th International

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By Michael Lehmann, Willi Meier (auth.), Josef Pieprzyk, Ahmad-Reza Sadeghi, Mark Manulis (eds.)

ISBN-10: 3642354033

ISBN-13: 9783642354038

ISBN-10: 3642354041

ISBN-13: 9783642354045

This ebook constitutes the refereed complaints of the eleventh foreign convention on Cryptology and community protection, CANS 2012, held in Darmstadt, Germany, in December 2012. The 22 revised complete papers, offered have been conscientiously reviewed and chosen from ninety nine submissions. The papers are equipped in topical sections on cryptanalysis; community defense; cryptographic protocols; encryption; and s-box theory.

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Extra info for Cryptology and Network Security: 11th International Conference, CANS 2012, Darmstadt, Germany, December 12-14, 2012. Proceedings

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The second attack is a multiif it is encrypted for m+1 2 ple transmission attack in which a message can be recovered with a probability of (1 − 2−l )m if it is encrypted under a same public key for l = log2 m + 2 times using different random numbers. The multiple transmission attack can be further improved with a linearization technique to that only log2 2m+1 times of encryptions are required to recover the message. An open problem related to the message recovery attack using only one cipehertext is discussed.

Some of the lightweight algorithms recently proposed are HIGHT [6], PRESENT [2], KATAN/KTANTAN [3], PRINTcipher [7], KLEIN [4], LED [5], Piccolo [9], and TWINE [10]. In this paper, we give our cryptanalytic results on TWINE. TWINE supports two key lengths, 80 and 128 bits. For each key length, encryption functions are the same but the key schedules are different. Corresponding to the key lengths, we denote TWINE-80 and TWINE-128. 10 encryptions, respectively [10]. In this paper, we present attacks on the full TWINE-80 and TWINE-128.

E. M · T = 2n , and does not require a 2n precomputation. 5 Relation of the Attack to the Security Proof Fleischmann et al. [9] derive a security proof for McOE, which they also generalize to McOE-X. They derive security up to approximately 2n/2 queries (see Thm. 2). Although we want to stress that our attack is a key-recovery attack, which is much stronger than a distinguishability attack, it does not seem to directly invalidate the security proof of [9]. Yet, it turns out to expose a critical weakness in the security proof.

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Cryptology and Network Security: 11th International Conference, CANS 2012, Darmstadt, Germany, December 12-14, 2012. Proceedings by Michael Lehmann, Willi Meier (auth.), Josef Pieprzyk, Ahmad-Reza Sadeghi, Mark Manulis (eds.)


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