Automated Host Attestation for Secure Virtualization Enclaves
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Solution Overview
Problem
Existing virtualized computing environments face challenges in providing secure, isolated run-time environments for sensitive computations, particularly in ensuring the confidentiality and privacy of cryptographic keys and other security artifacts, as existing solutions lack robust verification mechanisms and may compromise security artifacts due to inadequate attestation processes.
Innovation Solution
Implementing automated resource verifiers selected by clients to attest the configuration of virtualization hosts, using industry-standard evidence formats like TCG specifications, to establish isolated run-time environments with secure communication pathways, ensuring that security artifacts are not accessible outside these environments, thereby enhancing security and reducing the risk of compromise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If virtualization technologies are used to share computing resources among multiple customers, then hardware utilization and resource efficiency are improved, but security isolation and confidentiality of security artifacts may be compromised
Solution Approach 1:
The patent segments the virtualization environment by introducing isolated run-time environments (enclaves) within virtual machines. These enclaves create distinct security boundaries that separate sensitive computations from other virtual machines on the same host, allowing multiple customers to share hardware resources while maintaining strong security isolation through hardware-based boundaries.
Solution Approach 2:
The patent introduces automated resource verifiers as intermediary components that mediate between the virtualization host and customers. These verifiers perform attestation to confirm the security state of the host and enclave configurations, providing cryptographic proof that security artifacts are protected, thus enabling trusted resource sharing without compromising security.
2Measurement precision
If automated resource verifiers perform detailed attestation of virtualization host configuration, then security verification is improved, but system complexity and verification time increase
Solution Approach 1:
The patent implements preliminary attestation measures where the virtualization host configuration is verified before isolated run-time environments are instantiated. The automated resource verifiers perform security state verification in advance, generating cryptographic proofs that confirm the host meets security requirements, thereby simplifying the overall process by preventing security issues before they arise rather than requiring complex ongoing verification.
3Reliability
If isolated run-time environments are established with strict security boundaries, then security artifact protection is improved, but resource accessibility and flexibility are reduced
Solution Approach 1:
The patent applies local quality by implementing different security characteristics in different parts of the system. Isolated run-time environments have strict security boundaries for protecting security artifacts, while other parts of the virtualization system maintain standard accessibility. This allows resources to be highly secure where needed (within enclaves) while remaining accessible outside the enclaves, achieving both protection and flexibility through differentiated security zones.
Data Source
AI summary
A virtualization host is identified for an isolated run-time environment. One or more records generated at a security module of the host, which indicate that a first phase of a multi-phase establishment of an isolated run-time environment has been completed by a virtualization management component of the host, is transmitted to a resource verifier. In response to a host approval indicator from the resource verifier, the multi-phase establishment is completed at the virtualization host.