Multimedia Security & Forensics (CY-702 (D)) - Important Questions

Explain how the Discrete Cosine Transform (DCT) is used in multimedia compression and why is it considered lossy?

What is meant by the statement that "various industries merge to form interdisciplinary vendors of multimedia information"? Provide examples of such mergers.

Explain different aspects of virtual reality as a multimedia application.

Discuss the importance of resource management in ensuring QoS in multimedia applications. What types of resources are typically managed?

Discuss various factors which affect the Quality of Service (QoS) in multimedia delivery.

Explain how operating systems utilize layers to efficiently manage hardware resources, provide examples of layers in modern operating systems?

Imagine you are a photographer who wants to protect your digital images from unauthorized use? You have the option to use either visible or invisible watermarks. How would you decide which type of watermark to use for each of the following scenarios and what factors would influence your decision? Explain your reasoning for each scenario.

Explain the difference between active and passive security attacks in multimedia systems.

What is multimedia authentication and why is it important in ensuring the integrity of multimedia content? Provide examples of authentication mechanisms.

Explain the process of digital evidence extraction, including the steps involved and the tools used.

In the context of multimedia evidence handling, explain the significance of metadata in digital forensics. How can metadata assist in the authentication and analysis of multimedia files?

Write short note (on any two):

How can printer and scanner forensics play a role in identifying and mitigating these risks? Provide a case study to illustrate your points.

How can digital forensics experts authenticate and validate audio recordings in a legal context? Discuss.