Question: What is the primary security concern addressed by integrity protection for the 'application/mbms-msk+xml' MIME type in MBMS environments?
Option 1: Unauthorized access to premium content
Option 2: Eavesdropping on sensitive user data
Option 3: Malicious modification of multicast streams
Option 4: Denial of Service (DoS) through format modifications
Explanation: The primary concern addressed by integrity protection is the potential for denial of service attacks, as modifications to this format could result in a denial of service where the requesting entity may not receive the desired MSK. Integrity protection ensures message authenticity and completeness, preventing such DoS attacks.