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Digital rights management (DRM) solutions aim to prevent the copying ordistribution of copyrighted material. On mobile devices, a variety of DRMtechnologies have become widely deployed. However, a detailed security studycomparing their internal workings, and their strengths and weaknesses, remainsmissing in the existing literature. In this paper, we present the firstdetailed security analysis of mobile DRM systems, addressing the modernparadigm of cloud-based content delivery followed by major platforms, such asNetflix, Disney+, and Amazon Prime. We extensively analyse the security ofthree widely used DRM solutions -- Google Widevine, Apple FairPlay, andMicrosoft PlayReady -- deployed on billions of devices worldwide. We thenconsolidate their features and capabilities, deriving common features andsecurity properties for their evaluation. Furthermore, we identify somedesign-level shortcomings that render them vulnerable to emerging attackswithin the state of the art, including micro-architectural side-channelvulnerabilities and an absence of post-quantum security. Lastly, we proposemitigations and suggest future directions of research.

A First Look at Digital Rights Management Systems for Secure Mobile Content Delivery