The Chinese Wall model combines commercial discretion with legally enforceable mandatory controls. It is
required in the operation of many financial services organizations.
The Lattice model deals with military information. Lattice-based access control models were developed in
the early 1970s to deal with the confidentiality of military information. In the late 1970s and early 1980s,
researchers applied these models to certain integrity concerns. Later, application of the models to the
Chinese Wall policy, a confidentiality policy unique to the commercial sector, was developed. A balanced
perspective on lattice-based access control models is provided.
Perimeter Security
Opinions on perimeter security have changed a great deal over the past few years. Part of that change is that
the very nature of perimeter security is becoming increasingly uncertain, and everyone has a different view of
just what it is. The limits of the perimeter itself are becoming broad and extensive, with no geographic
boundaries, and remote access is becoming part of the integral network.
Is Perimeter Security Disappearing?
In essence, the perimeter has been transformed and extended to the various levels within the network.
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