Runtime Trusted Execution Environment for Secure Firmware Management
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Solution Overview
Problem
Existing information handling systems lack secure and efficient management of firmware components, particularly in peripheral devices, due to the absence of standardized runtime protocols for trusted execution environments, which can compromise integrity, authenticity, and compatibility across diverse devices and manufacturers, and expose peripheral firmware details to security risks.
Innovation Solution
Implementing a Runtime Trusted Execution Environment (TEE) that provides a trusted execution environment operation, using a Cloud-intercept Protocol (CiP) for trust authorization and embedded controller managed keys, to extend firmware level security and create a boot time security enclave for secure firmware updates and configuration, ensuring seamless interoperability with cloud-based peripheral devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If firmware management operations are performed without a trusted execution environment, then device complexity is reduced and ease of operation is improved, but security and reliability of firmware updates and configurations are compromised
Solution Approach 1:
A trusted execution environment (TEE) is introduced as an intermediary layer between the operating system and firmware management operations. The TEE provides a secure runtime environment that handles firmware updates and configurations, ensuring authenticity and integrity without requiring complex changes to the overall system architecture. The TEE acts as a mediator that validates and protects firmware operations while maintaining compatibility with existing system components.
Solution Approach 2:
The system is segmented into trusted and untrusted execution environments. The TEE creates a distinct secure zone within the information handling system that isolates firmware management operations from the general operating system runtime. This segmentation allows security-critical operations to occur in a protected environment while the rest of the system continues to operate normally, reducing the complexity burden on the entire system.
2Reliability
If a trusted execution environment is created for firmware management, then security validation and trust authorization are enhanced, but processing time and system overhead increase
Solution Approach 1:
Trust authorization and security validation are performed in advance through pre-established trust relationships and pre-configured security policies within the TEE. The trusted execution environment is set up beforehand with necessary cryptographic keys and validation rules, allowing firmware updates to be processed quickly without performing complex security checks during the actual update operation. This preliminary preparation reduces processing time while maintaining high security standards.
3Adaptability or versatility
If standardized runtime protocols for trusted execution environments are implemented, then interoperability and compatibility across diverse devices are improved, but device complexity and implementation difficulty increase
Solution Approach 1:
The trusted execution environment implements universal runtime protocols that enable the same security mechanisms to function across diverse devices and manufacturers. The TEE provides a standardized interface and protocol set that can be applied universally to different hardware platforms, processor types, and firmware configurations. This multi-functional approach allows a single TEE implementation to serve multiple purposes and work across various device types without requiring device-specific customizations.
Data Source
AI summary
A firmware management operation. The firmware management operation includes providing an information handling system with a distributed BIOS, the distributed BIOS including a BIOS component and a BIOS variable; identifying a processor environment installed on an information handling system from a plurality of processor environments; performing a trusted execution environment operation, the trusted execution environment operation creating a trusted execution environment within the information handling system, the trusted execution environment providing a trust zone for use with an operating system runtime emulation operation.