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Ensuring security of data is one of the fundamental needs of people. In this context, issues related to confidentiality, integrity and availability of the data arise with a crucial importance, whether in economic, legal or medical domains. Standards covering fine-grained access control were proposed and adopted to control access to data through queries. In… (More)
In this paper, we propose a novel approach to facilitate the administration of access control policies to ensure the confidentiality of data at the level of materialized views. A materialized view stores both the definition of the view and the rows resulting from the execution of the view. Several techniques and models have been proposed to control access… (More)
Given the increasing demand for blood smear analysis in the Hematology department of Oran (Algeria) Hospital and worldwide, in the literature there are some methods directed to the automation of this important problem. This paper presents a state-of-art about the used clustering methods.