Smart Card Activation Code Delivery to Set-Top Box Security Processor
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Solution Overview
Problem
Television service providers face challenges in securely enabling and disabling additional hardware functionalities in television receivers, as software enforcement methods are susceptible to hacking, allowing unauthorized access to features like Wi-Fi connectivity.
Innovation Solution
Implementing a hardware enforcement system using a trusted hardware environment with a security processor and a smart card, where unique activation codes for hardware components are managed and encrypted with global and local keys, ensuring only authorized access through secure messaging and decryption processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If software enforcement methods are used to enable and disable hardware functionalities, then ease of operation is improved, but security deteriorates as the system becomes susceptible to hacking
Solution Approach 1:
The patent introduces a secure messaging layer as an intermediary between the software enforcement mechanism and the hardware components. This secure messaging system uses encrypted communication protocols to transmit activation codes and control signals, preventing unauthorized access while maintaining the ease of software-based enabling and disabling of hardware functionalities.
2Reliability
If hardware enforcement system with trusted hardware environment is implemented, then security is improved, but device complexity increases
Solution Approach 1:
The patent segments the security enforcement functionality into distinct modular components: a trusted hardware environment module, a secure messaging module, and a hardware component module. Each module performs a specific function and can be independently managed, which reduces the overall system complexity while maintaining high security standards through specialized dedicated components.
3Reliability
If unique activation codes are encrypted with global and local keys, then security is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent implements preliminary action by pre-distributing both global and local encryption keys to authorized devices during the manufacturing and setup phase. This advance key distribution ensures that when activation codes need to be transmitted, both parties already possess the necessary cryptographic materials, eliminating the need for complex real-time key exchange protocols and reducing manufacturing precision requirements.
Data Source
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AI summary
Described herein are systems and methods for hardware enforcement of hardware functionality in a television receiver. An activation message containing an activation code for a specific hardware component within the television receiver can be transmitted from a television service provider system to a television receiver having an associated smart card. The smart card can decrypt the activation message, security check the activation message, confirm the activation message is intended for the television receiver, encrypt the activation message with a local key, and transmit the activation message to a security processor on the television receiver. The security processor can decrypt the activation message, security check the activation message to ensure it is from the smart card and has not been tampered with, and enable the hardware component within the television receiver based on the activation code within the activation message.