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A Stochastic Model to Investigate Data Center Performance and QoS in IaaS Cloud Computing Systems

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Cloud data center management is a key problem due to the numerous and heterogeneous strategies that can be applied, ranging from the VM placement to the federation with other clouds. Performance evaluation of Cloud Computing infrastructures is required to predict and quantify the cost-benefit of a strategy portfolio and the corresponding Quality of Service (QoS) […]

ALERT: An Anonymous Location-Based Efficient Routing Protocol in MANETs

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Mobile Ad Hoc Networks (MANETs) use anonymous routing protocols that hide node identities and/or routes from outside observers in order to provide anonymity protection. However, existing anonymous routing protocols relying on either hop-by-hop encryption or redundant traffic, either generate high cost or cannot provide full anonymity protection to data sources, destinations, and routes. The high […]

Memory access virtualization to deal with stack buffer overflow attacks

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In this paper we presented Memory access virtualization is a key mechanism we used to deal with stack buffer overflow attacks. The key technique of our solution is to virtualize memory accesses and move the vulnerable buffer into protected memory regions, which provides a fundamental and effective protection against recurrence of the same attack without […]

Measuring Time required to compromise a computer system

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In this paper three measurement methods – the time between compromises, the time to first compromise and the overall time to compromise .A frequent assumption in the domain of cyber security is that cyber intrusions follow the properties of a Poisson process, i.e., that the number of intrusions are well modeled by a Poisson distribution […]

Cloud oriented Content Delivery Network paradigm within a multi-provider Networked Cloud Environment

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In this paper is placed on the introduction, design and assessment of a complete model and framework aiming specifically at the deployment of a Cloud oriented Content Delivery Network paradigm within a multi-provider Networked Cloud Environment. A hierarchical framework is proposed and evaluated towards an efficient and scalable solution of content distribution over a multi-provider […]

TDMA SCHEDULE FOR CONTINUOUS DATA COLLECTION WITH DYNAMIC TRAFFIC PATTERNS

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We have presented a TDMA schedule that is suited to continuous data collection with dynamic traffic patterns. In contrast to most existing TDMA schedules designed for a static network traffic pattern, this paper proposes a novel TDMA schedule that is capable of efficiently collecting sensor data for any network traffic pattern and is thus well […]

Optimizing the performance of a class of distributed systems over the Internet

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In this paper, we present a mathematical model and an algorithmic solution to the client-server assignment problem. a large number of clients who communicate with each other indirectly via a number of intermediate servers. Optimizing the overall performance of such a system then can be formulated as a client-server assignment problem whose aim is to […]

HIGH UTILIZATION STRATEGIES FOR COMPUTATIONAL ECONOMIES

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Utility computing models have long been the focus of academic research, and with the recent success of commercial cloud providers, computation and storage is finally being realized as the fifth utility. Computational economies are often proposed as an efficient means of resource allocation , however adoption has been limited due to a lack of performance […]

Efficient Global Snapshot Algorithms for Large-Scale Distributed Systems

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A global snapshot represents a consistent global state of the system. A global state is consistent if and only if all pairs of its constituent local states of processors are consistent, i.e., if the receiving event of message is recorded, the sending event of the same message must also be recorded, and all in-transit messages […]

Certificate Revocation Scheme with proof facility to provide secure communications in MANETs

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Mobile ad hoc networks (MANETs) have attracted much attention due to their mobility and ease of deployment. However, the wireless and dynamic natures render them more vulnerable to various types of security attacks than the wired networks. The major challenge is to guarantee secure network services. To meet this challenge, certificate revocation is an important […]