Which of these is a strategy used in digital rights management?

Preventing unauthorized distribution is a key strategy used in digital rights management (DRM). The primary purpose of DRM is to protect the intellectual property of digital content and to ensure that the creators and distributors can control how their content is used. This includes measures taken to stop the unauthorized copying, sharing, or distribution of digital materials, such as music, videos, and software. By implementing restrictions that prevent unauthorized users from accessing or redistributing content, DRM helps to safeguard the rights of authors, artists, and content providers, ensuring that they can maintain control and receive appropriate compensation for their work.

Other strategies like network behavior analysis, document hashing, and auditing user access do play roles in cybersecurity and data integrity but are not specifically aligned with the goals and methods of digital rights management. Instead, those methods tend to focus more on network security, data verification, and access control rather than protecting the distribution of digital media.