Titlebook: Information Security and Privacy; 9th Australasian Con Huaxiong Wang,Josef Pieprzyk,Vijay Varadharajan Conference proceedings 2004 Springer

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0302-9743 July, 2004. The conference was sponsored by the Centre for Advanced Computing – Algorithms and Cryptography (ACAC), Information and Networked Security Systems Research (INSS), Macquarie U- versity and the Australian Computer Society. Theaimsoftheconferencearetobringtogetherresearchersandpractitioner

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Linear Code Implies Public-Key Traitor Tracing with ,nt to a slight modification of the corrected Kurosawa-Desmedt scheme, we show that we can also modify the Boneh–Franklin scheme to provide user revocation capability for this scheme. We also look at the problem of permanent removing a traitor in the Boneh-Franklin and prove some negative results.

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The Security of Cryptosystems Based on Class Semigroups of Imaginary Quadratic Non-maximal Ordersructural properties of the class semigroup render these crytosystems insecure, and that any cryptosystems based on the class semigroup are unlikely to provide any more security than those using the class group.

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Secure and Insecure Modifications of the Subset Difference Broadcast Encryption Schemeng receivers. We also propose a new method using trapdoor one-way permutations to reduce the storage overhead in the SD and Layered SD methods. This new method eliminates log . labels from receivers’ storage, where . is the total number of receivers. The method requires few public values and little computational overhead.

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A Generalization of PGV-Hash Functions and Security Analysis in Black-Box Modelctions we have 22 more collision resistant and one-way secure hash families. As all these 42 families are keyed hash families, these become target collision resistant also. All these 42 hash families have tight upper and lower bounds on (target) collision resistant and one-way-ness.