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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 […]

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 […]

FUSION-BASED FAULT TOLERANT DATA STRUCTURES HOSTED ON DISTRIBUTED SERVER

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In this paper, we present a technique referred to as fusion which combines the best of both these worlds to achieve the space efficiency of coding and the minimal update overhead of replication. Given a set of data structures, we maintain a set of fused backup data structures that can tolerate f crash faults among […]

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 […]

Degraded Document Images Binarization Technique

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In this paper, we propose a novel document image binarization technique that addresses these issues by using adaptive image contrast. The adaptive image contrast is a combination of the local image contrast and the local image gradient that is tolerant to text and background variation caused by different types of document degradations. In the proposed […]

IMPROVED COLOR BARCODE WITH INTERFERENCE CANCELLATION

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we propose  a model-based  interference cancellation procedure to overcome interference that is computationally inexpensive and provides a significant performance improvement. Specifically, we exploit this spectral diversity to realize a three-fold increase in the data rate by encoding independent data in the C, M, and Y print colorant channels and decoding the data from the complementary […]

Optimal Resource Allocation in Self Organizing Clouds

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By leveraging virtual machine (VM) technology which provides performance and fault isolation, cloud resources can be provisioned on demand in a fine grained, multiplexed manner rather than in monolithic pieces. By integrating volunteer computing into cloud architectures, we envision a gigantic self-organizing cloud (SOC) being formed to reap the huge potential of untapped commodity computing […]

CLEAN-SLATE ROUTING IN SENSOR NETWORKS

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Ad hoc low-power wireless networks are an exciting research direction in sensing and pervasive computing. Prior security work in this area has focused primarily on denial of communication at the routing or medium access control levels. This paper explores resource depletion attacks at the routing protocol layer, which permanently disable networks by quickly draining nodes’ […]