Computer
Adding time dimension to relational model and extending relational algebra
Information Systems
A homogeneous relational model and query languages for temporal databases
ACM Transactions on Database Systems (TODS)
A generalized model for a relational temporal database
SIGMOD '88 Proceedings of the 1988 ACM SIGMOD international conference on Management of data
Extending relational algebra to manipulate temporal data
Information Systems
Support for temporal data by complex objects
Proceedings of the sixteenth international conference on Very large databases
Information Sciences: an International Journal
The modeling and representation of security semantics for database applications
The modeling and representation of security semantics for database applications
On temporal modeling in the context of object databases
ACM SIGMOD Record
Separating semantics from representation in a temporal object database domain
CIKM '93 Proceedings of the second international conference on Information and knowledge management
A new storage organization for temporal data bases
Journal of Systems and Software - Special issue on information and knowledge management
A coherent architecture for a temporal object data base management system
Journal of Systems and Software - Special issue on information and knowledge management
SIGMOD '85 Proceedings of the 1985 ACM SIGMOD international conference on Management of data
On an algebra for historical relational databases: two views
SIGMOD '85 Proceedings of the 1985 ACM SIGMOD international conference on Management of data
A query language for a homogeneous temporal database
PODS '85 Proceedings of the fourth ACM SIGACT-SIGMOD symposium on Principles of database systems
A lattice model of secure information flow
Communications of the ACM
Research Directions in Database Security
Research Directions in Database Security
Information Security
SIGMOD '83 Proceedings of the 1983 ACM SIGMOD international conference on Management of data
Designing DBMS support for the temporal dimension
SIGMOD '84 Proceedings of the 1984 ACM SIGMOD international conference on Management of data
Lattice-Based Access Control Models
Computer
Incremental Implementation Model for Relational Databases with Transaction Time
IEEE Transactions on Knowledge and Data Engineering
Results of the IFIP WG 11.3 Workshop on Database Security V: Status and Prospects
Results of the IFIP WG 11.3 Workshop on Database Security V: Status and Prospects
Summary-Table-By-Example: A Database Query Language for Manipulating Summary Data
Proceedings of the First International Conference on Data Engineering
Results of the IFIP WG 11.3 Workshop on Database Security V: Status and Prospects
On Transaction Processing for Multilevel Secure Replicated Databases
ESORICS '92 Proceedings of the Second European Symposium on Research in Computer Security
Polyinstantation for Cover Stories
ESORICS '92 Proceedings of the Second European Symposium on Research in Computer Security
A Framework for Temporal Object Databases
CIKM '92 Selected Papers from the First International Conference on Information and Knowledge Management, Expanding the Definition of Database
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Within many organizations the number of databases containing classified or otherwise sensitive data is increasing rapidly. Access to these databases must be restricted and controlled to limit the unauthorized disclosure, or malicious modification of data contained in them. However, the conventional models of authorization that have been designed for database systems supporting the hierarchical, network and relational models of data do not provide adequate mechanisms to support controlled access of temporal objects and context based temporal information. In this paper we extend the multilevel secure relational model to capture the functionality required of a temporal database, i.e. a database that supports some aspect of time, not counting user-defined time. In particular we assign class access to bitemporal timestamped attributes, and give explicit security classifications to temporal elements.