An authorization model for a shared data base
SIGMOD '75 Proceedings of the 1975 ACM SIGMOD international conference on Management of data
Access control in a relational data base management system by query modification
ACM '74 Proceedings of the 1974 annual conference - Volume 1
PRIMARY ACCESS CONTROL IN LARGE-SCALE TIME-SHARED DECISION SYSTEMS
PRIMARY ACCESS CONTROL IN LARGE-SCALE TIME-SHARED DECISION SYSTEMS
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A data structuring scheme for authorization purposes is presented, that: i) provides a powerful and flexible way of defining access control rules; ii) allows convenient evaluation of access. Algorithms for definition and evaluation of access are given, and possible applications are discussed.