الفهرس 
A framework for implementing and evaluating security issues in data warehouses
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Abstract
This thesis presents a new framework for implementing security issues in DWs named data warehouse signature (DWS) through two models, DWS end and DW Receive. The DWS framework achieves three security issues, confidentiality, Integrity, and availability (CIA) of data. This framework reaches high performance using parallel computing through a middleware. This thesis presents a new mathematical model that represents the equations proven to find the maximum number of executors connected in the middleware for high performance. This thesis presents the enhancement of DWS framework through proposing a novel authentication and group-key distribution model, based on modular symmetric polynomials, to distribute a secure group-key between our middleware nodes. This model has the lowest cost of computation, communication and complexity overheads among the existing security models. It also achieves the key security, and prevents insider and outsider attacks by increasing the security level