Secure Portable Entity for Deferred Broadcast Retransmission
Solution Overview
Problem
Existing portable electronic devices for receiving and retransmitting broadcast digital content lack secure mechanisms, allowing illicit copying and unauthorized access, particularly in pay channels and deferred retransmission scenarios.
Innovation Solution
A removable secure portable electronic entity with means for receiving and sending broadcast digital content, featuring secure deferred retransmission capabilities that operate in parallel or quasi-parallel modes, including authentication, encryption, and speed limitations to prevent illicit copying and ensure secure access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If deferred retransmission is implemented in portable electronic devices, then users can access broadcast content at their convenience, but security vulnerabilities arise allowing illicit copying and unauthorized access
Solution Approach 1:
The system separates security-critical functions (authentication, encryption key management) from the host device and places them in a dedicated secure element. This segmentation isolates the security vulnerabilities of the host from the content protection mechanisms, allowing deferred retransmission functionality while maintaining security through the isolated secure environment.
Solution Approach 2:
A secure element acts as an intermediary between the broadcast content source and the host device. It receives content directly, performs secure authentication and encryption, and controls the retransmission process. This intermediary prevents the host device from directly accessing or copying content, resolving the security issue while enabling deferred retransmission.
2Reliability
If secure authentication and encryption mechanisms are implemented, then content security is improved, but device complexity increases
Solution Approach 1:
Complex security mechanisms (authentication modules, encryption engines, key management systems) are extracted from the main device architecture and consolidated into a separate secure element. This extraction reduces the complexity burden on the host device while maintaining comprehensive security functionality within the dedicated secure component.
Solution Approach 2:
The secure element is designed as a universal security module that can handle multiple functions (authentication, encryption, key management, digital rights enforcement) within a single integrated component. This multi-functionality consolidates what would otherwise require multiple separate security subsystems, reducing overall device complexity while maintaining robust security.
Data Source
AI summary
A removable secure portable electronic entity includes elements for receiving a broadcast digital content, elements for sending the received broadcast digital content, secure elements for deferred retransmission of the received digital content adapted to prohibit reproduction of the received digital content prior to sending it and to instigate the deferred sending of the received digital content by the sending elements, the elements being adapted to operate in parallel mode or in quasi-parallel mode. In variants, the secure deferred retransmission elements include a unit for storing the received digital content, for example a non-volatile memory. In variants, the secure deferred retransmission elements include members for authentication of a user.