Which of the following models must be most considered in a shared data hosting environment so that the data of one customer is not disclosed a competitor or other customers sharing that hosted environment?

A.
Brewer�Nash

B.
Clark�Wilson

C.
Bell�LaPadula

D.
Lipner

Explanation:
A: While the other models listed can provide confi dentiality assurance, it is only the BrewerNash Model, which is also known as the Chinese wall model, that has a clear separation of access rights. The principle of BrewerNash model is that users should not be able to access the confi dential information of both a client organization and one or more of its competitors. It is called the Chinese wall model because, like the Great Wall of China, once you are on one side of the wall, you cannot get to the other side. Page 691.