An access control model for video database systems

Abstract

Content-based video database access control is becoming very important, but it depends on the progresses of the following related research issues: (a) efficient video analysis for supporting semantic visual concept representation; (b) effective video database indexing structure; (c) the development of suitable video database models; and (d) the development of access control models tailored to the characteristics of video data. In this paper, we propose a novel approach to support multilevel access control in video databases. Our access control technique combines a video database indexing mechanism with a hierarchical organization of visual concepts (i.e., video database indexing units), so that different classes of users can access different video elements or even the same video element with different quality levels according to their permissions. These video elements, which, in our access control mechanism, are used for specifying the authorization objects, can be a semantic cluster, a subcluster, a video scene, a video shot, a video frame, or even a salient object (i.e., region of interest). In the paper, we first introduce our techniques for obtaining these multilevel Permission to make digital/hard copy of part or all of this work for personal or classroom use is granted without fee provided that the copies are not made or distributed for profit or commercial advantage, the copyright notice, the title of the publication, and its date appear, and notice is given that copying is by permission of ACM, Inc. To copy otherwise, to republish, to post on servers, or to redistribute to lists requires prior specific permission and/or a fee. 156• Bertino et al.video access units. We also propose a hierarchical video database indexing technique to support our multilevel video access control mechanism. Then, we present an innovative access control model which is able to support flexible multilevel access control to video elements. Moreover, the application of our multilevel video database modeling, representation, and indexing for MPEG-7 is discussed.

A hierarchical access control model for video database systems

“…Also, how to support varying protection granularity levels for video data objects has not been addressed before. The only two approaches we are aware of have been proposed by Kumar and Babu [1998] and by Bertino et al [2000]. The approach by Kumar and Babu [1998] is, however, very primitive in that it only allows one to hide some frames for specific classes of users; it neither supports content-based authorizations nor does it allow one to hide part of a frame.…”

“…The approach by Kumar and Babu [1998] is, however, very primitive in that it only allows one to hide some frames for specific classes of users; it neither supports content-based authorizations nor does it allow one to hide part of a frame. The work by Bertino et al [2000] provides access control units with different levels of granularity and also supports content-based access control, through the use of textual annotations associated with video object. Such an approach, however, does not actually support access control based on visual features.…”

“…Supporting video access control based on visual features is becoming attractive and important because most existing video retrieval systems rely on the use of visual features. Moreover, the approach by Bertino et al [2000] does not address the development of access structures specifically tailored for a hierarchical access control model. Finally, the current work also casts the proposed approach in the framework of MPEG-7, whereas the work by Bertino et al [2000] does not consider this standard.…”

“…Moreover, the approach by Bertino et al [2000] does not address the development of access structures specifically tailored for a hierarchical access control model. Finally, the current work also casts the proposed approach in the framework of MPEG-7, whereas the work by Bertino et al [2000] does not consider this standard. In addition to the work mentioned above, there has been some work on specifying authorizations with different levels of granularity and on content-based authorizations, which we discuss below.…”

Multimedia Access Control Using RDF Metadata

“…Bertino at al. [BHAE02] propose a security framework to model access control in video databases. Their objects are sequences of frames or identifiable objects within a frame.…”