Security of multimedia database systems becomes a critical problem, especially with the proliferation of multimedia data and applications. One of the most challenging issues is to provide a content-based multimedia database access control that efficiently handles different user’s access with possible fine-grained restrictions at a specific level of the multimedia data. However, the realization of such a model depends on other related research issues: (a) Efficient multimedia data analysis for supporting semantic visual concept representation; (b) Practical representation of the multimedia database; (c) Effective multimedia database indexing structure for content-based retrieval; (d) Development of a suitable access control.