Trusted Domain Architecture for Secure Content Distribution
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Solution Overview
Problem
Current digital service delivery systems face challenges in integrating diverse services across different hardware and software environments, leading to economic inefficiencies and limited interoperability, with inadequate control over content distribution and access, which hampers the release of new content due to unauthorized access and reproduction concerns.
Innovation Solution
The development of a network architecture that enables secure distribution of applications, programming, and media services through a conditional access system, trusted domain, and digital rights management, using cryptographic keys and encrypted codes to manage content access and distribution across various devices and platforms, allowing for centralized control and unified service delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple different services and equipment vendors are used to provide digital services, then service diversity and functionality are improved, but system complexity and interoperability difficulties increase
Solution Approach 1:
The patent implements a universal trusted domain architecture that can accommodate multiple service providers and equipment vendors through standardized interfaces. The domain controller and security modules provide multi-functional capabilities to manage diverse services (pay-per-view, subscription, VOD, PVR, IPTV, Internet access, telephony) within a unified framework, reducing the need for separate management systems for each service type.
Solution Approach 2:
The trusted domain acts as an intermediary layer between multiple service providers/equipment vendors and the user's client device. The domain controller and security modules mediate authentication, authorization, and content protection across different vendors' equipment, enabling interoperability without requiring direct integration between all service providers and devices.
2Ease of operation
If content is made accessible across multiple devices and platforms, then user convenience and service integration are improved, but content security and control are worsened
Solution Approach 1:
The patent segments the content protection system into distinct functional modules: domain controller, security modules, and client device components. Each segment has specific responsibilities (authentication, key management, content decryption), allowing content to be safely accessed across multiple devices while maintaining security controls at each segment boundary through cryptographic protection.
Solution Approach 2:
The system creates secure copies of cryptographic keys and authentication credentials that are distributed to authorized devices within the trusted domain. These copies are protected through encryption and can only be used within the domain boundaries, enabling content access on multiple devices while preventing unauthorized distribution outside the domain.
3Reliability
If centralized control and management is implemented, then content protection and service coordination are improved, but system complexity and deployment difficulty increase
Solution Approach 1:
The patent implements preliminary authentication and authorization actions during the domain setup phase. The domain controller pre-establishes security policies, cryptographic key pairs, and device credentials before content distribution begins. This preliminary configuration simplifies subsequent content protection operations and reduces the complexity of real-time security management.
Solution Approach 2:
The trusted domain architecture enables self-service capabilities where the domain controller automatically manages authentication, authorization, and key distribution without requiring manual intervention for each content access request. The system self-configures security parameters and manages cryptographic materials, reducing deployment complexity while maintaining centralized control.
Data Source
AI summary
Methods and apparatus for control of data and content protection mechanisms across a network using a download delivery paradigm. In one embodiment, conditional access (CA), digital rights management (DRM), and trusted domain (TD) security policies are delivered, configured and enforced with respect to consumer premises equipment (CPE) within a cable television network. A trusted domain is established within the user's premises within which content access, distribution, and reproduction can be controlled remotely by the network operator. The content may be distributed to secure or non-secure “output” domains consistent with the security policies enforced by secure CA, DRM, and TD clients running within the trusted domain. Legacy and retail CPE models are also supported. A network security architecture comprising an authentication proxy (AP), provisioning system (MPS), and conditional access system (CAS) is also disclosed, which can interface with a trusted authority (TA) for cryptographic element management and CPE/user device authentication.