At the time of their introduction, Digital Rights Management systems were often triumphantly presented as the decisive techlogical response to digital piracy. However, shortly after their introduction, it became clear that this techlogical protection presented a rather small but costly speed bump on the digital highway, leading to the protected content and t a panacea for this undesirable phemen. As a result, Digital Rights Management systems have undergone crucial transformation. With their further development, Digital Rights Management systems ceased to focus solely on combating piracy and started to collect vast amounts of information about the users and content usage for various purposes. This book describes the crucial stages of this process, and it evaluates the extent of the threat to the privacy of users. It also offers n-legal insight by adding social and ecomical views on the development in the field. [Subject: Computer Techlogy Law, Data Protection Law, Digital Piracy Law, European Law]