Secure Enclave Measurement via Processor Instructions
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Solution Overview
Problem
Existing information processing systems face challenges in securely measuring and verifying the integrity of secure enclaves, which are critical for protecting confidential information from unauthorized access and tampering.
Innovation Solution
The implementation of specific processor instructions (ECREATE, EADD, EEXTEND, and EINIT) and hardware components (such as ECREATE hardware, EADD hardware, EEXTEND hardware, and EINIT hardware) within a processor architecture allows for the creation, measurement, and initialization of secure enclaves, using cryptographic hashes to ensure the identity and integrity of enclave content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If secure enclaves are established to protect confidential information, then security and integrity of data are improved, but device complexity and difficulty of measuring/verifying enclave integrity increase
Solution Approach 1:
The patent introduces a measurement register as an intermediary component that automatically captures and stores cryptographic measurements of enclave content. This measurement register acts as a mediator between the enclave execution environment and the verification system, eliminating the need for complex external measurement mechanisms while providing reliable integrity verification capability.
Solution Approach 2:
The secure enclave measurement system performs self-measurement through automated cryptographic hashing of enclave content that is stored in the measurement register. The system serves itself by automatically generating and maintaining integrity measurements without requiring external intervention, thereby reducing device complexity while maintaining high reliability.
2Reliability
If cryptographic measurements are implemented to verify enclave identity, then security verification capability is improved, but loss of time for measurement and verification processes increases
Solution Approach 1:
The measurement register is initialized with a baseline measurement value before enclave execution begins. This preliminary setup allows the system to perform incremental measurements during enclave operations rather than requiring complete re-measurement, significantly reducing the time loss for verification while maintaining cryptographic security.
Solution Approach 2:
The measurement register continuously updates enclave measurements in real-time during execution, maintaining an ongoing record of enclave integrity. This continuous measurement approach eliminates the need for discrete, time-consuming verification interruptions, allowing security verification to proceed without significant time loss while maintaining high reliability.
Data Source
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AI summary
Embodiments of an invention for measuring a secure enclave are disclosed. In one embodiment, a processor includes an instruction unit and an execution unit. The instruction unit is to receive a first, a second, and a third instruction. The execution unit is to execute the first, the second, and the third instruction. Execution of the first instruction includes initializing a measurement field in a control structure of a secure enclave with an initial value. Execution of the second instruction includes adding a region to the secure enclave. Execution of the third instruction includes measuring a subregion of the region.