computer security Computer security, cybersecurity (cyber security), or information technology security (IT security) is the protection of computer systems and networks from attack by malicious actors that may result in unauthorized information disclosure, t ...

, lattice-based access control (LBAC) is a complex

access control In the fields of physical security and information security, access control (AC) is the selective restriction of access to a place or other resource, while access management describes the process. The act of ''accessing'' may mean consuming ...

model based on the interaction between any combination of objects (such as resources, computers, and applications) and subjects (such as individuals, groups or organizations). In this type of label-based mandatory access control model, a lattice is used to define the levels of security that an object may have and that a subject may have access to. The subject is only allowed to access an object if the security level of the subject is greater than or equal to that of the object. Mathematically, the security level access may also be expressed in terms of the lattice (a

partial order In mathematics, especially order theory, a partially ordered set (also poset) formalizes and generalizes the intuitive concept of an ordering, sequencing, or arrangement of the elements of a set. A poset consists of a set together with a binary ...

set) where each object and subject have a greatest lower bound (meet) and least upper bound (join) of access rights. For example, if two subjects ''A'' and ''B'' need access to an object, the security level is defined as the meet of the levels of ''A'' and ''B''. In another example, if two objects ''X'' and ''Y'' are combined, they form another object ''Z'', which is assigned the security level formed by the join of the levels of ''X'' and ''Y''. LBAC is also known as a label-based access control (or ''rule-based access control'') restriction as opposed to

role-based access control In computer systems security, role-based access control (RBAC) or role-based security is an approach to restricting system access to authorized users. It is an approach to implement mandatory access control (MAC) or discretionary access control ...

(RBAC). Lattice based access control models were first formally defined by Denning (1976); see also Sandhu (1993).

References

* * Computer security models Lattice theory Access control {{Computer-security-stub

See also

References