| 1. |
- Gholami, Ali, et al.
(författare)
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ScaBIA : Scalable brain image analysis in the cloud
- 2013
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Ingår i: CLOSER 2013 - Proceedings of the 3rd International Conference on Cloud Computing and Services Science. - 9789898565525 ; , s. 329-336
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Konferensbidrag (refereegranskat)abstract
- The use of cloud computing as a new paradigm has become a reality. Cloud computing leverages the use of on-demand CPU power and storage resources while eliminating the cost of commodity hardware ownership. Cloud computing is now gaining popularity among many different organizations and commercial sectors. In this paper, we present the scalable brain image analysis (ScaBIA) architecture, a new model to run statistical parametric analysis (SPM) jobs using cloud computing. SPM is one of the most popular toolkits in neuroscience for running compute-intensive brain image analysis tasks. However, issues such as sharing raw data and results, as well as scalability and performance are major bottlenecks in the "single PC"-execution model. In this work, we describe a prototype using the generic worker (GW), an e-Science as a service middleware, on top of Microsoft Azure to run and manage the SPM tasks. The functional prototype shows that ScaBIA provides a scalable framework for multi-job submission and enables users to share data securely using storage access keys across different organizations.
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| 2. |
- Rasmusson, Lars, et al.
(författare)
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Hypervisor integrity measurement assistant
- 2013
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Ingår i: CLOSER 2013 - Proceedings of the 3rd International Conference on Cloud Computing and Services Science. - 9789898565525 ; , s. 26-35
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Konferensbidrag (refereegranskat)abstract
- An attacker who has gained access to a computer may want to run arbitrary programs of his choice, and upload or modify configuration files, etc. We can severely restrict the power of the attacker by having a white-list of approved file checksums and a mechanism that prevents the kernel from loading any file with a bad checksum. The check may be placed in the kernel, but that requires a kernel that is prepared for it. The check may also be placed in a hypervisor which intercepts the kernel and prevents the kernel from loading a bad file. Moving the integrity check out from the VM kernel makes it harder for the intruder to bypass the check. We describe the implementation of two systems and give performance results. In the first implementation the checksumming and decision is performed by the hypervisor instead of by the kernel. In the second implementation the kernel computes the checksum and only the final integrity decision is made by the hypervisor. We conclude that it is technically possible to put file integrity control into the hypervisor, both for kernels without and with pre-compiled support for integrity measurement.
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