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By Mike Reiter (auth.), Choon-sik Park, Seongtaek Chee (eds.)
This booklet constitutes the completely refereed postproceedings of the seventh foreign convention on info safeguard and Cryptology, ICISC 2004, held in Seoul, Korea in December 2004.
The 34 revised complete papers offered have undergone rounds of reviewing and development and have been chosen from 194 submissions. The papers are prepared in topical sections on block ciphers and movement ciphers, public key cryptosystems, PKI and similar implementations, electronic signatures, elliptic curve cryptosystems, provable defense and primitives, community safeguard, steganography, and biometrics.
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Additional info for Information Security and Cryptology – ICISC 2004: 7th International Conference, Seoul, Korea, December 2-3, 2004, Revised Selected Papers
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To specify such variables, we define U, V as U = {i|1 ≤ i ≤ k, xi depends on xt }, V = {j|1 ≤ j ≤ l, yj depends on xt }. -S. Cho et al. Let α = #U + #V. Note that α ≥ βd by the definition of the branch number. By defining U c = {1, · · · , k} − U, V c = {1, · · · , l} − V, we have that k l DP Si (ai , xi ) DP Sj (yj , bj ) i=1 (x1 ,··· ,xk ,0,··· ,0)∈BL (γa ,γb ) j=1 ≤ DP Si (ai , xi ))( ( x1 ,··· ,xt−1 i∈U c where Φt = obtain that i∈U DP Si (ai , xi ))( DP Si (ai , xi ))( ( xt xt ( i∈U j∈V DP Sj (yj , bj ))Φt .
2259, Springer-Verlag, pp. 112-128, 2001. 11. L. Keliher, Refined Anlaysis of Bounds Related to Linear and Differential Cryptanalysis for the AES, Fourth Conference on the Advanced Encryption Standard (AES4). 12. D. Kwon, J. Kim, S. H. Sung, Y. H. Song, Y. Yeom, E-J. Yoon, S, Lee, J. Lee, S. Chee, D. Han, and J. Hong, New block cipher: ARIA, ICISC 2003, LNCS 2971, pp. 432-445, 2004. 13. M. Matsui, Linear cryptanalysis method for DES cipher, Advance in CryptologyEurocrypt’93, LNCS Vol. 765, Springer-Verlag, pp.
The running time is 200,000 hours on a single Sun Ultra 5. Park et al. [15, 16] proposed a method for upper bounding on the MDP and MLHP for AES-like structures. 075 × 2−106 , respectively. Although the method of Park et al. [15, 16] produces good upper bounds for AES-like structures, it does not apply to other SPNs (for example ARIA). To find upper bounds on the MDP and MLHP for SPNs, one first finds upper bounds for 2-round and then use a recursive technique for 3 or more rounds. Thus it is very important to find effective upper bounds for 2-round SPNs.