Device Certificate Self-Individualization Template
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Solution Overview
Problem
Current digital rights management (DRM) solutions require unique device certificates for each consumer electronics device, increasing manufacturing complexity and cost, as well as limiting portability of protected content across devices.
Innovation Solution
A device certificate template is used, allowing consumer electronics devices to self-generate unique device certificates after manufacturing, simplifying the manufacturing process and enabling access to protected content by delaying certificate generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unique device certificates are generated during manufacturing, then device security and content protection are ensured, but manufacturing complexity and cost increase
Solution Approach 1:
The patent applies preliminary action by embedding a device certificate template during manufacturing that contains all necessary security parameters and cryptographic elements. This template serves as a pre-prepared structure that will automatically generate the unique device certificate when activated, eliminating the need for complex post-manufacturing certificate generation processes while maintaining security requirements.
Solution Approach 2:
The device certificate template is designed to enable self-service functionality where the device automatically generates its unique certificate using embedded cryptographic keys and device-specific identifiers. This self-generation process occurs without external intervention, reducing manufacturing complexity while ensuring each device has a secure, unique certificate for content protection.
2Reliability
If device certificates are embedded during manufacturing, then content protection is ensured, but portability of protected content across devices is limited
Solution Approach 1:
The patent segments the device certificate into two parts: a static template embedded during manufacturing containing security parameters and cryptographic infrastructure, and a dynamic component generated at device activation using device-specific identifiers. This segmentation allows the security framework to remain consistent while enabling flexible certificate generation across multiple devices, thereby improving content portability without compromising protection.
Solution Approach 2:
The device certificate template utilizes parameter changes by incorporating device-specific identifiers and cryptographic keys that vary between devices while maintaining the same template structure. This allows the same manufacturing process to produce secure certificates for multiple devices, enabling content to be protected yet portable across the device family through parameter variation rather than structural change.
3Ease of operation
If complete device certificates are provided at manufacture, then immediate content access is enabled, but manufacturing cost increases
Solution Approach 1:
The patent employs the principle of cheap short-living objects by using a standardized, reusable device certificate template that can be embedded once during manufacturing at low cost. This template then serves indefinitely across multiple devices through automatic certificate generation, replacing the need for expensive, custom certificate creation for each individual device while maintaining immediate content access capability.
Data Source
AI summary
Generating a device certificate. A method of generating a device certificate comprising forming a template that will generate a device certificate upon the occurrence of a triggering event, filling in an authorization root certificate section of the template; filling in an authorization certificate section of the template, filling in a group certificate section of the template, and forming a device certificate section of the template.