Download Information Security and Privacy: 9th Australasian by Shaoquan Jiang, Guang Gong (auth.), Huaxiong Wang, Josef PDF

By Shaoquan Jiang, Guang Gong (auth.), Huaxiong Wang, Josef Pieprzyk, Vijay Varadharajan (eds.)

The ninth Australasian convention on info safeguard and privateness (ACISP 2004) used to be held in Sydney, 13–15 July, 2004. The convention was once backed by way of the Centre for complex Computing – Algorithms and Cryptography (ACAC), info and Networked safety structures learn (INSS), Macquarie U- versity and the Australian laptop Society. Theaimsoftheconferencearetobringtogetherresearchersandpractitioners operating in components of data defense and privateness from universities, and govt sectors. The convention application coated a variety of features together with cryptography, cryptanalysis, platforms and community safety. this system committee approved forty-one papers from 195 submissions. The - viewing method took six weeks and every paper used to be rigorously evaluated via a minimum of 3 individuals of this system committee. We take pleasure in the exertions of the individuals of this system committee and exterior referees who gave many hours in their useful time. Of the accredited papers, there have been 9 from Korea, six from Australia, ?ve each one from Japan and the us, 3 each one from China and Singapore, each one from Canada and Switzerland, and one every one from Belgium, France, Germany, Taiwan, The Netherlands and the united kingdom. the entire authors, even if their papers have been permitted, made valued contributions to the convention. as well as the contributed papers, Dr Arjen Lenstra gave an invited speak, entitled most likely and not going development in Factoring. ThisyeartheprogramcommitteeintroducedtheBestStudentPaperAward. The winner of the prize for the easiest pupil Paper used to be Yan-Cheng Chang from Harvard collage for his paper unmarried Database deepest info Retrieval with Logarithmic Communication.

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Extra info for Information Security and Privacy: 9th Australasian Conference, ACISP 2004, Sydney, Australia, July 13-15, 2004. Proceedings

Example text

Let R be a subset of {1, . . , n} such that 1 ≤ |R| < 2k. R represents the set of revoked users. Choose β = (β1 , . . , β2k ), such that in the equation Γ · β = = ( 1 , . . , n ), we have i = 0 if and only if i ∈ R. This can be done because any 2k rows of Γ are linear independent. Let η1 = g1β1 , . . , η2k = g1β2k . A message M ∈ Gq is encrypted as r2 y r1 , M g1r2 , β1 , . . , β2k , hr11 η1r2 , . . , hr2k1 η2k where r1 , r2 are random numbers in Zq . Decryption. User i first calculates i = γ (i) · β.

Hwang, C. H. Kim and P. J. Lee, “An Efficient Revocation Scheme with Minimal Message Length for Stateless Receivers,” Information Security and Privacy, 8th Australasian Conference, ACISP 2003, LNCS 2727, Springer, pp. 377-386, 2003. 9. A. J. Menezes, P. C. van Oorschot and S. A. Vanstone, “Handbook of Applied Cryptography,” CRC Press, 1997. 10. D. Naor, M. Naor and J. Lotspiech, “Revocation and Tracing Schemes for Stateless Receivers,” Advances in Cryptology - Crypto 2001, LNCS 2139, Springer, pp.

In addition, the public key TTS enables the system manager to prepare a public key that allows all content providers to broadcast data to users. In TTS, users share all secret keys with the system manager. Therefore, non-repudiation cannot be offered. That is, a malicious system manager can implicate an innocent user in the construction of a pirate decoder, and users can always deny their implication in the construction of a pirate decoder and claim that it was the malicious system manager. A solution to this problem is an asymmetric TTS, which was first introduced by Pfitzmann and Waidner [19, 20].

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