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A security model may be founded upon a formal model of access rights, a model of computation, a model of distributed computing, or no particular theoretical grounding at all. A computer security model is implemented through a computer security policy. For a more complete list of available articles on specific security models, see Category ...
This category contains articles describing computer security models that are or have been used in practical systems or proposed in theory. ... Protection mechanism; R.
Multilevel security or multiple levels of security (MLS) is the application of a computer system to process information with incompatible classifications (i.e., at different security levels), permit access by users with different security clearances and needs-to-know, and prevent users from obtaining access to information for which they lack authorization.
In computer security, general access control includes identification, authorization, authentication, access approval, and audit.A more narrow definition of access control would cover only access approval, whereby the system makes a decision to grant or reject an access request from an already authenticated subject, based on what the subject is authorized to access.
It does not model the rules by which permissions can change in any particular system, and therefore only gives an incomplete description of the system's access control security policy. An Access Control Matrix should be thought of only as an abstract model of permissions at a given point in time; a literal implementation of it as a two ...
A simple definition of a security policy is "to set who may use what information in a computer system". [1] The access matrix model, first introduced in 1971, [2] is a generalized description of operating system protection mechanisms. [3] The separation of protection and security is a special case of the separation of mechanism and policy. [4]
There are many different ways the information and information systems can be threatened. To fully protect the information during its lifetime, each component of the information processing system must have its own protection mechanisms. [7] The building up, layering on, and overlapping of security measures is called "defense in depth."
Capability-based security is a concept in the design of secure computing systems, one of the existing security models. A capability (known in some systems as a key) is a communicable, unforgeable token of authority. It refers to a value that references an object along with an associated set of access rights.