Which of the following models uses a directed graph to specify the rights that a subject can transfer to an object or that a subject can take from another subject?

The Take-Grant Protection Model is a formal access control model that uses a directed graph to represent subjects, objects, and their associated rights. It defines primitive operations, 'take' and 'grant,' which specify how subjects can acquire rights to objects or pass rights to other subjects/objects, thereby modeling the dynamic transfer of access privileges within a system.

The Biba Integrity Model focuses on preventing unauthorized modification of data and ensuring data integrity, using a lattice-based approach rather than a directed graph for rights transfer.

The Bell-LaPadula Model focuses on ensuring confidentiality by preventing unauthorized access to classified information, also using a lattice model, and does not primarily describe rights transfer via a directed graph.

An Access Matrix is a static tabular representation of access rights between subjects and objects but does not define the rules or mechanisms for how these rights are dynamically transferred like the Take-Grant model.