A Mandatory Access Control (MAC) access control policy is lattice-based access control.
A lattice is used in this type of label-based mandatory access control model to define the levels of security that an object can have and that a subject can access. The subject is only permitted to access an object if his or her security level is greater than or equal to that of the object. A Lattice-based access control is used to value derivatives by using a binomial tree to calculate the various paths the price of an underlying asset, such as a stock, could take over the life of the derivative.
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