TEE Migration Policy Enforcement Without a Central Orchestrator
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing confidential computing (CC) migration techniques rely on a globally understood policy or a central orchestrator, which can compromise security by enforcing identical security levels or attestation signatures, leading to potential vulnerabilities and attacks.
Innovation Solution
Embedding migration policies within the fabric of the CC infrastructure using migration agents associated with respective trusted execution environments (TEEs) to enforce security requirements, ensuring integrity and preventing insecure migrations without relying on a central orchestrator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a globally understood policy or central orchestrator is used to manage TEE migration, then migration management is simplified and centralized, but security is compromised due to enforcement of identical security levels or attestation signatures
Solution Approach 1:
The patent segments the centralized migration management into distributed components: each TEE is equipped with a migration agent and embedded migration policy that operates independently. This segmentation allows local security decisions to be made without relying on a central orchestrator, thereby improving security while maintaining migration management capability.
Solution Approach 2:
The patent introduces migration agents as intermediary components that reside within each TEE and enforce migration policies locally. These agents act as mediators between the TEE and the migration orchestration process, enabling secure, decentralized policy enforcement without requiring a central authority, thus resolving the security vulnerability of centralized approaches.
2Adaptability or versatility
If identical security levels or attestation signatures are enforced across all TEEs, then a globally consistent policy can be applied, but security vulnerabilities and attacks may occur due to overly constraining policies
Solution Approach 1:
The patent applies local quality by allowing each TEE to have its own embedded migration policy tailored to its specific security requirements and characteristics. Instead of enforcing a uniform global policy, each TEE can define and enforce its own security criteria through locally embedded policies, enabling adaptability while maintaining security through customized, context-aware decision-making.
3Device complexity
If a central orchestrator manages migration externally, then migration coordination is simplified, but security is compromised by creating a single point of failure and attack target
Solution Approach 1:
The patent extracts the migration policy enforcement functionality from the external central orchestrator and embeds it directly within each TEE's support infrastructure. This extraction removes the central orchestrator as a security vulnerability while distributing the coordination capability to individual TEEs through their embedded policies and migration agents, thereby eliminating the single point of failure.
Data Source
AI summary
Provided is an apparatus including interface circuitry, machine-readable instructions, and processing circuitry to execute the machine-readable instructions to decide on a migration of a workload from a first trusted execution environment (TEE) to a second TEE according to a migration policy. The migration policy is embedded into support infrastructure of the first TEE.