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Memory deduplication improves memory density by merging identical memory pages in multi-tenanted cloud. However, memory deduplication is vulnerable to memory disclosure attacks and covert channel attacks. The covert channel bases on the difference in write access time on deduplicated memory pages that are re-created by Copy-on-Write technique. Prior works have shown that malicious attackers can make...
At present, With the wide application of Linux system, the security performance of Linux system is meeting more and more challenges. This paper analyzes the the security flaw of traditional Linux security mechanism in which the presence of superuser root violates the principle of least privilege in security system design, which brings various kinds of privilege elevation attacks. The current fine-grained...
This paper studies and evaluates the feasibility and the performance of different level interpolations for improving spatial resolution of diffusion tensor magnetic resonance imaging (DT-MRI or DTI). In particular, the following techniques are investigated: anisotropic interpolation operating on scalar gray-level images, log-Euclidean interpolation method, and the quaternion interpolation method,...
In this paper, a configuration context reduction method for coarse-grained reconfigurable architecture (CGRA) is proposed. The proposed method exploits the structure correlation of computation tasks that are mapped onto CGRA and reduce the redundancies in configuration context. Experimental results show that the proposed method can averagely reduce the configuration context size up to 57% and speed...
An approach for document orientation detection and classification by using support vector machine (SVM) theorem is proposed in this paper. First, all the characters in a document image will be isolated and some valid ones are selected. Using the valid characters, the document image will be vectorized to a 32-dimensional vector by the feature extracting. By training lots of samples, an SVM classifier...
System virtualization, which provides good isolation, is now widely used in server consolidation. Meanwhile, one of the hot topics in this field is to extend virtualization for embedded systems. However, current popular virtualization platforms do not support real-time operating systems such as embedded Linux well because the platform is not real-time ware, which will bring low-performance I/O and...
In this paper, an efficient support vector machine (SVM) algorithm for solving multi-class pattern recognition problems is proposed. The samples in each class are trained by one-class SVM (OCSVM), respectively. And then several sets of support vectors (SVs) are obtained, which well express the distribution of the original training samples. These SVs finally are combined into a set of training samples...
Commodity operating systems are usually large and complex, leading host-based security tools often provide inadequate protection against malware because execution environment for software is untrusted. As a result, most software currently uses various ways to defend malware attacks. However, these approaches not only raise the complexity of the software but also fail to offer an engrained security...
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