Abstract. This paper explores the intersection of technology and law in Digital Rights Management (DRM) systems. By examining the application and regulation of encryption technologies, digital watermarking, and comprehensive copyright protection systems, this study provides a detailed understanding of how these technologies prevent unauthorized copying, distribution, and use of digital content. The paper introduces mathematical models to quantify the effectiveness of encryption and watermarking, offering insights into their practical applications and implications for intellectual property law. The comprehensive DRM effectiveness model combines these individual models, accounting for user inconvenience, to provide a holistic view of DRM system performance. Key case studies illustrate the implementation of DRM technologies in various industries, highlighting best practices and regulatory compliance. The study concludes with recommendations for future research and policy development to enhance the effectiveness and legal robustness of DRM technologies. This work contributes to the academic and practical understanding of DRM, offering a framework for optimizing DRM strategies in a dynamic digital landscape.