By Maciej Grześkowiak (auth.), Kanta Matsuura, Eiichiro Fujisaki (eds.)
This booklet constitutes the refereed lawsuits of the 3rd foreign Workshop on defense, IWSEC 2008, held in Kagawa, Japan, in November 2008.
The 18 revised complete papers awarded including 1 invited speak have been rigorously reviewed and chosen from ninety four submissions. The papers are prepared in topical sections on cryptography, signature and signcryption, software program defense, privateness security and contents safety, authentication and entry regulate, in addition to implementation.
Read or Download Advances in Information and Computer Security: Third International Workshop on Security, IWSEC 2008, Kagawa, Japan, November 25-27, 2008. Proceedings PDF
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Additional info for Advances in Information and Computer Security: Third International Workshop on Security, IWSEC 2008, Kagawa, Japan, November 25-27, 2008. Proceedings
Assume we are given an adversary A which breaks CCA-security of the above scheme with running time τ , advantage , and qD decryption queries. We use A to construct another adversary B which, by using the DDH oracle, distinguishes hardcore bit h of the (gap) Diﬃe-Hellman key in G. This suﬃces for proving CCA-security of our scheme under the GDH assumption since existence of an algorithm which distinguishes a hardcore bit of the gap Diﬃe-Hellman key immediately implies existence of another algorithm which solves the GDH problem by the deﬁnition.
Deciphering) 2–1 Finding forging equations (9), (11) 2–2 Forging a signature (resp. Deciphering) by using the forging equations Note that we start this algorithm directly from step 2 in the case that K = F2 . Main computation of this algorithm against odd-IC scheme is solving O(n( +1)/2 )-dimensional linear equations over Fq in step2–1. So the asymptotic computational complexity of this algorithm is O(n3( +1)/2 lg2 q) . (23) Similarly, the complexity against even-IC scheme is O(n6 lg2 q). We used the computer whose CPU is 2GHz AMD Opteron 246, memory is 4GB, and hard disk is 160GB.
TCC 2006. LNCS, vol. 3876, pp. 581–600. Springer, Heidelberg (2006) Chosen Ciphertext Secure Public Key Encryption with a Simple Structure 31 25. : Chosen-ciphertext secure key-encapsulation based on gap hashed DiﬃeHellman. , Wang, X. ) PKC 2007. LNCS, vol. 4450, pp. 282– 297. org/2007/036 26. : A new paradigm of hybrid encryption scheme. In: Franklin, M. ) CRYPTO 2004. LNCS, vol. 3152, pp. 426–442. Springer, Heidelberg (2004) 27. : Public-key cryptosystems provably secure against chosen ciphertext attacks.
Advances in Information and Computer Security: Third International Workshop on Security, IWSEC 2008, Kagawa, Japan, November 25-27, 2008. Proceedings by Maciej Grześkowiak (auth.), Kanta Matsuura, Eiichiro Fujisaki (eds.)