Computer Security: Art and Science by Matt Bishop. ISBN:978-0321712332 This ques

Question

Computer Security: Art and Science by Matt Bishop. ISBN:978-0321712332

This question is in relation to Access Control Matrix. More specifically it deals with Principle of attenuation which states that A subject may not give rights it does not possess to another. For more information please refer to chapter 2 of Computer Security Art and Science By Matt Bishop. This is just part c.

c: Consider a restricted form of attenuation, which works as follows. A subject q is attenuated by the maximal set of rights that q, or any of its ancestors, has. So, for example, if any ancestor of q has r permission over a file f, q can also r f. How does this affect the spread of rights throughout the access control matrix of the system? Develop an example matrix that includes the ancestor right, and illustrate your answer.

Explanation / Answer

A common assumption in the philosophy of mind is that of substrate-independence. The idea is that mental states can supervene on any of a broad class of physical substrates. Provided a system implements the right sort of computational structures and processes, it can be associated with conscious experiences. It is not an essential property of consciousness that it is implemented on carbon-based biological neural networks inside a cranium: silicon-based processors inside a computer could in principle do the trick as well.

Arguments for this thesis have been given in the literature, and although it is not entirely uncontroversial, we shall here take it as a given.

The argument we shall present does not, however, depend on any very strong version of functionalism or computationalism. For example, we need not assume that the thesis of substrate-independence is necessarily true (either analytically or metaphysically)

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.