Download Information Security Applications: 13th International by Yanfeng Wang, Wenling Wu, Xiaoli Yu, Lei Zhang (auth.), Dong PDF

By Yanfeng Wang, Wenling Wu, Xiaoli Yu, Lei Zhang (auth.), Dong Hoon Lee, Moti Yung (eds.)

This publication constitutes the completely refereed post-workshop court cases of the thirteenth foreign Workshop on info defense functions, WISA 2012, held in Jeju Island, Korea, in August 2012.
The 26 revised complete papers provided including eight brief papers have been rigorously reviewed and chosen from a hundred submissions. The papers are targeting all technical and sensible features of symmetric cipher, safe hardware/public key crypto program, cryptographic protocols/digital forensics, community safeguard, and belief management/database security.

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Extra resources for Information Security Applications: 13th International Workshop, WISA 2012, Jeju Island, Korea, August 16-18, 2012, Revised Selected Papers

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Where D is a subset of {X|wt(X) = m − 1, m} \ {(1, · · · , 1, 0, · · · , 0)}. It is clear m m−1 that AI(f2∗ ) ≥ m − 1, the number of different f2∗ is 22M ∗ −1 , and |supp(f2∗ ) ∩ (W ≤m−2 ∪ W ≥m+1 )| = M − 1 (4) For given f2∗ , by Lemma 1 and Lemma 3, for any k(0 ≤ k ≤ M − 1) vectors in W ≤m−2 \ ({(0, · · · , 0), (1, 0, · · · , 0)}), we can always obtain a new function with maximum AI by finding other k(0 ≤ k ≤ M − 2) vectors in W ≥m+1 . Since the new functions obtained are different as the sets of k vectors are different, so the number is 2M−2 .

45 — Chen et al. 6 Futhermore, we compare result of QUAD implementations with Berbain et al. [2] and Chen et al. [5] on QUAD(2, 160, 160) and QUAD(2, 320, 320) in Table2. Unfortunately, QUAD(2, 160, 160) with the parallelization strategy 2 is not so fast, compared with the results of Berbain et al. 3 times faster than Chen et al. [5] Moreover, it is faster than QUAD(2, 160, 160). Therefore, we think that strategy 2 is suited to QUAD(2, n, n), which n is a large number. 6 Conclusions We presented two parallelization strategies for accelerating the evaluation of multivariate quadratic polynomial systems.

Choose the 2n structures of plaintexts, and each structure contain 248 plaintexts (Pl , Pr ) = (∗ x, ∗ ∗), where x is a fixed 16-bit value, ‘*‘ take all the possible 16-bit values. Query their corresponding ciphertexts (Cl , Cr ) and store (Pl , Pr , Cl , Cr ) in a hash table H indexed by 32-bit values P1,l ⊕ Cr,l and Cr,r . Sieve the plaintext and ciphertext pair, which satisfy ΔPl,l = ΔCr,l and ΔCr,r = 0. There are 2n+95−32 = 2n+63 pairs remain on average. 26 K. Jia and L. Li 2. For each plaintext-ciphertext pair, we know the input and output differences of FI 71 , where ΔXI 71 = ΔCr,l , ΔYI 71 = ΔCl,l .

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