In digital rights management, the level of robustness depends on the various types of tools and
attacks to which they must be resistant or immune. Which of the following types of tools are
expensive, require skill, and are not easily available?

A.
Hand tools

B.
Widely available tools

C.
Specialized tools

D.
Professional tools

Explanation:
The tools used in DRM to define the level of robustness are as follows: 1.Widely
available tools: These tools are easy to use and are available to everyone. For example, screw-drivers and file editors. 2.Specialized tools: These tools require skill and are available at
reasonable prices. For example, debuggers, decompilers, and memory scanners. 3.Professional
tools: These tools are expensive, require skill, and are not easily available. For example, logic
analyzers, circuit emulators, and chip disassembly systems.