Title :
An authorization system for temporal data
Author :
Gal, Avigdor ; Atluri, Vijayalakshmi ; Xu, Gang
Author_Institution :
Fac. of Ind. Eng. & Manage., Technion-Israel Inst. of Technol., Haifa, Israel
Abstract :
We present a system, called the Temporal Data Authorization Model (TDAM), for managing authorizations for temporal data. TDAM is capable of expressing access control policies based on the temporal characteristics of data. TDAM extends existing authorization models to allow the specifications of temporal constraints on data, based on data validity, data capture time, and replication time, using either absolute or relative time references. The ability to specify access control based on such temporal aspects were not supported before. The formulae are evaluated with respect to various temporal assignments to ensure the correctness of access control
Keywords :
authorisation; client-server systems; database management systems; absolute time references; access control policies; authorization system; authorizations management; data capture time; data validity; relative time references; replication time; temporal characteristics; temporal constraints; temporal data; Access control; Authorization; Data engineering; Databases; Engineering management; Information management; Management information systems; Software libraries; Technology management; Web server;
Conference_Titel :
Data Engineering, 2002. Proceedings. 18th International Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
0-7695-1531-2
DOI :
10.1109/ICDE.2002.994747
