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Access controls for federated database environments - taxonomy of design choices,hoices concerning access control in database federations. The taxonomy is organized in the categories granularity, authorization, and access control. Additionally, the impact of distribution, heterogeneity and autonomy, three characteristics of database federations, is examined for each of the desig知识 发表于 2025-3-27 07:08:42
Authorization in Multimedia Conferencing Systems,that pose some intricate security problems; for example, a secret meeting of the defense department, a negotiating conference among different commercial groups, etc.. However, there are few studies that address the security of multimedia applications. Good solutions to these critical aspects will in杀子女者 发表于 2025-3-27 11:20:36
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Digital signature schemes based on Lucas functions,ently Smith and Skinner presented an ElGamal signature scheme based on Lucas functions..In this paper we point out a serious weakness in this approach and present our version of an ElGamal signature scheme based on Lucas functions. Furthermore, we outline how to apply the ideas of the Meta-ElGamal s委屈 发表于 2025-3-27 22:18:55
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