At which of the following levels of robustness in DRM must the security functions be immune to widely available tools and specialized tools and resistant to professional tools?
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A. B. C. D.C.
At Level 1 of robustness in DRM, the security functions must be immune to widely available tools and specialized tools and resistant to professional tools.
DRM stands for Digital Rights Management, which is a set of technologies and policies designed to protect digital content from unauthorized access, copying, and distribution. The robustness level of DRM refers to the level of security measures implemented in DRM systems to prevent unauthorized access and distribution of digital content.
There are four levels of robustness in DRM, and each level specifies different security requirements for the DRM system. The levels are as follows:
Level 1: Basic Robustness
Level 2: Robustness for portable devices
Level 3: Robustness for network distribution
Level 4: Robustness for streaming
To answer the question, the security functions must be immune to widely available tools and specialized tools and resistant to professional tools at Level 4 of robustness in DRM. Level 4 robustness is the highest level of security and is designed for streaming media. At this level, the security functions must be able to withstand attacks from a wide range of tools, including widely available tools, specialized tools, and professional tools.
Widely available tools are tools that are available to the general public, such as media players and web browsers. Specialized tools are tools that are designed specifically to circumvent DRM systems, such as DRM removal software. Professional tools are tools used by security professionals to test the security of DRM systems, such as reverse engineering tools.
Therefore, the correct answer to the question is option B: Level 4.