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Access Control Models
  • DAC controls on the ability to assign access permission to an object by a user already possessing access permission. The ability to assign these permissions should be controlled with the same precision as the ability to access the objects themselves. (NCSC-TG-028 ver 1).
  • A model that gives rules of operation showing how access decisions are made. Traditionally, an access control model involves a set of states together with a set of primitive operations on states whose behavior is defined by rules of operation. Typically, each state contains a set of S of "SUBJECTS," a set O of "objects," and an access matrix A. For each subject s and object o, A[s,o] is a set of access rights, such as read, write, execute, and own. (NCSC-TG-010 ver 1).
  • A model which relates subjects, objects and access types.