Trusted Co-Processor for Cloud Malware Detection
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Solution Overview
Problem
In cloud computing environments, customers face challenges in verifying the security and integrity of resources, as they lack control over hardware and data, making it difficult to trust reports about malware or intrusion detection, especially when resources are shared and potentially compromised.
Innovation Solution
A trusted co-processor is introduced as a peripheral card connected to a high-speed bus within the host machine, allowing customers to perform trusted scans and notifications independently of the host machine's malware, using APIs and out-of-band channels for secure communication and updates, ensuring the co-processor's integrity and preventing malware manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cloud computing resources are used to provide access to electronic resources, then scalability and accessibility are improved, but security and integrity verification becomes difficult
Solution Approach 1:
A trusted co-processor is introduced as an intermediary component between the cloud provider's hardware and the customer's software. This co-processor operates in a trusted execution environment that is isolated from the host machine's malware, allowing it to perform security scans and generate verified reports. The co-processor acts as a mediator that maintains trust relationships while enabling cloud computing functionality.
2Productivity
If resources are shared with other customers, then resource utilization is improved, but data and software security may be compromised
Solution Approach 1:
The system segments the computing environment into isolated trusted execution environments for each customer. Each customer's workloads run in separate virtual machines with their own trusted co-processor, creating security boundaries that prevent malware from one customer's environment from affecting another customer's resources, even though resources are shared at the infrastructure level.
3Difficulty of detecting and measuring
If malware scanning is performed on shared resources, then detection capability is improved, but trust in scan reports deteriorates when resources are compromised
Solution Approach 1:
The malware scanning functionality is extracted from the host machine and placed in a separate trusted co-processor. This extraction ensures that the scanning process itself is not vulnerable to host machine malware, as the co-processor operates in an isolated trusted execution environment. The co-processor can scan memory and disk of virtual machines while maintaining its own security integrity.
4Reliability
If a trusted co-processor is added to perform independent scans, then security verification is improved, but device complexity increases
Solution Approach 1:
The trusted co-processor is nested within the cloud provider's hardware infrastructure but operates as a separate, customer-accessible entity. The co-processor is integrated at the hardware level with virtualization support, allowing it to access memory and storage of virtual machines without requiring complex software configurations. This nested architecture provides security functionality while minimizing complexity at the customer level.
Data Source
AI summary
A trusted co-processor can provide a hardware-based observation point into the operation of a host machine owned by a resource provider or other such entity. The co-processor can be installed via a peripheral card on a fast bus, such as a PCI bus, on the host machine. The co-processor can execute malware detection software, and can use this software to analyze data and/or code obtained from the relevant resources of the host machine. The trusted co-processor can notify the customer or another appropriate entity of the results of the scan, such that an appropriate action can be taken if malware is detected. The results of the scan can be trusted, as malware will be unable to falsify such a notification or modify the operation of the trusted co-processor.