System R: relational approach to database management
ACM Transactions on Database Systems (TODS)
An authorization mechanism for a relational database system
ACM Transactions on Database Systems (TODS)
A lattice model of secure information flow
Communications of the ACM
On the implementation of security measures in information systems
Communications of the ACM
A note on the confinement problem
Communications of the ACM
A relational model of data for large shared data banks
Communications of the ACM
An authorization model for a shared data base
SIGMOD '75 Proceedings of the 1975 ACM SIGMOD international conference on Management of data
Performing inferences over relation data bases
SIGMOD '75 Proceedings of the 1975 ACM SIGMOD international conference on Management of data
A Semantic Model for Data Base Protection Languages
Systems for Large Data Bases
An overview of recent data base research
ACM SIGMIS Database
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The need for reliable protection facilities, which allow controlled sharing of data in multi-user data base management systems, is steadily growing. This paper first discusses concepts relevant to such protection facilities, including data security, object grenularity, data incependence, and software certification. Those system characteristics required for reliable security and suitable functiorality are listec. The facilities which an operating system must provide in support of a such date base management system also are outlined. A kernel based data base management system architecture is then presented which supports value independent security and allows various grains of protection down to the size of comains in relations. It is shown that the proposed structure can substantially improve the reliability of protection in data bases.