The access matrix model, first introduced in 1971, is a generalized description of operating system protection mechanisms.
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An access matrix can be envisioned as a rectangular array of cells, with one row per subject and one column per object.
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Examples of models with protection and security separation include : access matrix, UCLA Data Secure Unix, take-grant and constraints.
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The primitive requests can modify the access matrix by adding or removing access rights for a pair of subjects and objects and by adding or removing subjects or objects.
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The Access Matrix had option of a padded cloth bag with shoulder-strap or a heavier-duty leather / cloth bound protective case with carry handle and shoulder-strap.
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It is always necessary to define a TE access matrix containing rules about clearance granted to a given security context, or subject's rights over objects according to an authorization scheme.
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Also, the original TE access matrix was extended to others structures : lattice-based, history-based, environment-based, policy logic & This is a matter of implementation of TE by the various operating systems.
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Another option was to combine the word processing and telecommunications features to create a document using the word processing software and immediately upload the document directly to either an online services such as Compuserve or indeed to another'waiting'Access Matrix at their head office.
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