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Online Intrusion Alert Aggregation with Generative Data Stream Modeling

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Alert aggregation is an important subtask of intrusion detection. The goal is to identify and to cluster different alerts-produced by low-level intrusion detection systems, firewalls, etc.-belonging to a specific attack instance which has been initiated by an attacker at a certain point in time. Thus, meta-alerts can be generated for the clusters that contain all […]

RITAS: Services for Randomized Intrusion Tolerance

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Randomized agreement protocols have been around for more than two decades. Often assumed to be inefficient due to their high expected communication and computation complexities, they have remained overlooked by the community-at-large as a valid solution for the deployment of fault-tolerant distributed systems. This paper aims to demonstrate that randomization can be a very competitive […]

Deadlock-Free Adaptive Routing in Meshes with Fault-Tolerance Ability Based on Channel Overlapping

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A new deadlock-free routing scheme for meshes is proposed based on a new virtual network partitioning scheme, called channel overlapping. Two virtual networks can share some common virtual channels based on the new virtual network partitioning scheme. The deadlock-free adaptive routing method is then extended to deadlock-free adaptive fault-tolerant routing in 3D meshes still with […]

A Generic Framework for Three-Factor Authentication: Preserving Security and Privacy in Distributed Systems

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As part of the security within distributed systems, various services and resources need protection from unauthorized use. Remote authentication is the most commonly used method to determine the identity of a remote client. This paper investigates a systematic approach for authenticating clients by three factors, namely password, smart card, and biometrics. A generic and secure […]

Predictive Resource Management of Multiple Monitoring Applications

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We propose a predictive resource management scheme for network monitoring systems that can proactively shed excess load while maintaining the accuracy of monitoring applications within bounds defined by the operator. The main novelty of our scheme is that it considers monitoring applications as black boxes, with arbitrary (and highly variable) input traffic and processing cost. […]

Model-Based Identification of Dominant Congested Links

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In this paper, we propose a model-based approach that uses periodic end-end probes to identify whether a “dominant congested link” exists along an end-end path. Informally, a dominant congested link refers to a link that incurs the most losses and significant queuing delays along the path. We begin by providing a formal yet intuitive definition […]

Optical Layer Security in Fiber-Optic Networks

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The physical layer of an optical network is vulnerable to a variety of attacks, including jamming, physical infrastructure attacks, eavesdropping, and interception. As the demand for network capacity grows dramatically, the issue of securing the physical layer of optical network cannot be overlooked. In this survey paper, we discuss the security threats in an optical […]

Optical Layer Security in Fiber-Optic Networks

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The physical layer of an optical network is vulnerable to a variety of attacks, including jamming, physical infrastructure attacks, eavesdropping, and interception. As the demand for network capacity grows dramatically, the issue of securing the physical layer of optical network cannot be overlooked. In this survey paper, we discuss the security threats in an optical […]

A secure communication game with a relay helping the eavesdropper

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In this work a four terminal Gaussian network composed of a source, a destination, an eavesdropper and a jammer relay is studied. The jammer relay does not hear the source transmission. It assists the eavesdropper and aims to decrease the achievable secrecy rates. The source, on the other hand, aims to increase the achievable secrecy […]

Research on Cloud Computing Application in the Peer-to-Peer Based Video-on-Demand Systems

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In the peer-to-peer based video-on-demand systems, when the number of users online reaches a certain scale, It will greatly influence the bandwidth and the speed of response server when the number of online users reaches a certain scale. At the same time, there are so many video resources and sometimes the base number of users […]