By Yu Sasaki (auth.), Ali Miri, Serge Vaudenay (eds.)

This e-book constitutes the completely refereed post-conference complaints of the 18th Annual foreign Workshop on chosen parts in Cryptography, SAC 2011, held in Toronto, Canada in August 2011. The 23 revised complete papers provided including 2 invited papers have been rigorously reviewed and chosen from ninety two submissions. The papers are prepared in topical sections on cryptanalysis of hash features, protection in clouds, bits and randomness, cryptanalysis of ciphers, cryptanalysis of public-key crypthography, cipher implementation, new designs and mathematical elements of utilized cryptography.

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Extra resources for Selected Areas in Cryptography: 18th International Workshop, SAC 2011, Toronto, ON, Canada, August 11-12, 2011, Revised Selected Papers

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370–392. Springer, Heidelberg (2010) 13. : Non-Full-Active Super-Sbox Analysis: Applications to ECHO and Grøstl. In: Abe, M. ) ASIACRYPT 2010. LNCS, vol. 6477, pp. 38–55. Springer, Heidelberg (2010) 14. : Subspace Distinguisher for 5/8 Rounds of the ECHO-256 Hash Function. R. ) SAC 2010. LNCS, vol. 6544, pp. 369–387. Springer, Heidelberg (2011) 15. pdf 16. : A Generalized Birthday Problem. In: Yung, M. ) CRYPTO 2002. LNCS, vol. 2442, pp. 288–303. Springer, Heidelberg (2002) Provable Chosen-Target-Forced-Midfix Preimage Resistance Elena Andreeva and Bart Mennink Dept.

Springer, Heidelberg (2011) 11. : How to Improve Rebound Attacks. org/ 12. : Improved Differential Attacks for ECHO and Grøstl. In: Rabin, T. ) CRYPTO 2010. LNCS, vol. 6223, pp. 370–392. Springer, Heidelberg (2010) 13. : Non-Full-Active Super-Sbox Analysis: Applications to ECHO and Grøstl. In: Abe, M. ) ASIACRYPT 2010. LNCS, vol. 6477, pp. 38–55. Springer, Heidelberg (2010) 14. : Subspace Distinguisher for 5/8 Rounds of the ECHO-256 Hash Function. R. ) SAC 2010. LNCS, vol. 6544, pp. 369–387. Springer, Heidelberg (2011) 15.

Focusing on ECHO-256 and denoting f its compression function, Hi the i-th output chaining value, Mi = Mi0 || Mi1 || Mi2 the i-th message block composed of three chunks of 512 bits each Mij and S = [C0 C1 C2 C3 ] the four 512-bit ECHO-columns constituting state S, we have (H0 = IV ): C0 ← Hi−1 , C1 ← Mi0 , C2 ← Mi1 , C3 ← Mi2 . AES. We recall that one round, among the ten ones, of the AES-128 permutation is the succession of four transformations: SubBytes (SB), ShiftRows (SR), MixColumns (MC) and AddRoundKey (AK).

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