VM Enclave Credential Security via Instance Metadata
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Solution Overview
Problem
In virtualized computing environments, securing role credentials across multiple guest virtual machines on shared physical host machines is complex and resource-intensive, as existing methods require cumbersome IP address whitelisting and lack robust protection against credential misappropriation.
Innovation Solution
The implementation of an enclave, a secure storage area generated specifically for each virtual machine instance, stores keys to decrypt encrypted role credentials, ensuring that even if credentials are compromised, they remain useless outside the instance, thereby reducing the computational resources needed for IP address management and providing an additional layer of protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If IP address whitelisting is used to secure role credentials, then access control is provided, but device complexity and computational resources increase significantly
Solution Approach 1:
The patent extracts the security verification function from the network layer (IP address whitelisting) and relocates it to the application layer through instance metadata. This allows credentials to be secured without relying on complex network-level IP management, thereby reducing device complexity while maintaining security reliability
Solution Approach 2:
The patent introduces instance metadata as an intermediary component that mediates between the VM instance and role credentials. This intermediary stores and manages credentials with automatic expiration and scope limitations, eliminating the need for complex IP address whitelisting mechanisms while providing robust access control
2Ease of operation
If traditional credential storage methods are used, then ease of operation is maintained, but security against credential misappropriation is insufficient
Solution Approach 1:
The patent applies preliminary action by pre-configuring instance metadata with automatic credential expiration times and scope limitations before credentials are accessed. This preemptive configuration ensures that even if credentials are misappropriated, their utility is automatically limited by time and scope constraints, enhancing security without complicating operational access
Solution Approach 2:
The patent changes the parameters of credential storage by transitioning from static, long-term credential storage to dynamic, time-limited credential storage in instance metadata. Credentials automatically expire after a predetermined time period and are scoped to specific resources, transforming the security model while maintaining ease of operation through automated management
3Ease of operation
If credentials are stored in plaintext for easy access, then ease of operation improves, but security against unauthorized access deteriorates
Solution Approach 1:
The patent applies local quality by implementing fine-grained access control on credentials stored in instance metadata. Each credential is associated with specific VM instances, resource types, and time periods, creating localized security zones where credentials are only accessible under specific conditions. This enables easy retrieval for authorized instances while preventing unauthorized access through scoped limitations
4Reliability
If comprehensive IP address whitelisting is implemented, then access control reliability improves, but computational resources and time consumption increase
Solution Approach 1:
The patent extracts the access control logic from network-level IP address validation and relocates it to application-level instance metadata verification. This eliminates the computational overhead of maintaining and checking extensive IP address whitelists, improving system performance while maintaining access control reliability through metadata-based authentication
Data Source
AI summary
A customer in a computing resource provider environment, running an application on a VM instance, uses role credentials to request access to one or more web services. The request is forwarded to an enclave associated with the VM instance such that the enclave digitally signs the request and access to the one or more web services is provided.