Encryption for Digital Content Encryption for Digital Content is an area in cryptography that is widely used in commercial productions (e.g. Blu Ray and HD DVDs). This book provides a comprehensive mathematical treatment of combinatorial encryption techniques used in digital content distribution systems and related attack models. A complete description of broadcast encryption with various revocation and tracing functionalities is included.Encryption for Digital Content introduces the subset cover framework (currently used in AACS Blu Ray and HD DVDs ) and tracking revocation mechanisms in various attack models. Pirate evolution attacks are covered in depth providing an extensive treatment of the complexity of the revocation problem for multi receiver (subscriber) encryption mechanisms as well as the complexity of the traceability problem. This volume also illustrates the manner that attacks affect parameter selection and how this impacts implementations.