A system administrator grants group rights to a group of individuals called Accounting instead of granting individual rights to each individual. This is an example of which of the following security mechanisms?

A.
Layering

B.
Data hiding

C.
Cryptographic protections

D.
Abstraction

Explanation:
D: In computer programming, layering is the organization of programming into separate functional components that interact in some sequential and hierarchical way, with each layer usually having an interface only to the layer above it and the layer below it. Data hiding maintains activities at diff erent security levels to separate these levels from each other. Cryptography can be used in a variety of ways to protect sensitive system functions and data. By encrypting sensitive information and limiting the availability of key material, data can be hidden from less privileged parts of the system. Abstraction involves the removal of characteristics from an entity in order to easily represent its essential properties. Page 724.