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Security Dictionary
Can't tell 'smtp' from 'snmp'? Find the precise meaning of these and hundreds of other security-related terms in our convenient and up-to-date Security Dictionary.
lattice model
(I) A security model for flow control in a system, based on the
lattice that is formed by the finite security levels in a system
and their partial ordering. [Denn] (See: flow control, security
level, security model.)
(C) The model describes the semantic structure formed by a finite
set of security levels, such as those used in military
organizations.
(C) A lattice is a finite set together with a partial ordering on
its elements such that for every pair of elements there is a least
upper bound and a greatest lower bound. For example, a lattice is
formed by a finite set S of security levels -- i.e., a set S of all
ordered pairs (x, c), where x is one of a finite set X of
hierarchically ordered classification levels (X1, ..., Xm), and c
is a (possibly empty) subset of a finite set C of non-hierarchical
categories (C1, ..., Cn) -- together with the "dominate" relation.
(See: dominate.)
