| This thesis discusses security issues related to multidatabase system and proposes a prototype secure software architecture design. The motivations behind developing the architecture design are to provide multilevel security, resolve the cascade problem, and develop the security architecture according to trusted computer standard evaluation criteria by US Department of Defense (DoD). The main goals in the design are illustrated by means of a multilevel security model, data protection concepts, and solving the cascade problem. The major contribution of this thesis is the development of mechanisms that provides a transparent security architecture for multidatabase systems. |
