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Lattice-based access control is a form of access control in which users are assigned a matrix of authorizations for particular areas of access.
What is Lattice-based access control (LBAC)?
LBAC is a complex Access Control Model that is based on the interaction of any combination of Digital Subjects and Service Provider Resources (such as Resource Actions, Operating System Attributes, and Application Attributes).
A lattice is used in this type of label-based Mandatory Access Control model to define the levels of security that a Resource can have and that a Digital Subject can access. The Digital Subject may only access a Resource if his or her security level is higher than or equal to that of the Resource.
The security level access can also be expressed mathematically in terms of a lattice (a partial order set) in which each Resource and Digital Subject has the greatest lower bound (meet) and the least upper bound (join) of access rights.
For example, if two Digital Subjects A and B require access to a Resource, the security level is defined as the sum of A and B's levels. In another case, if two Resources X and Y are combined, they form a new Resource Z, which is assigned the security level formed by the union of the levels of X and Y.
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