The Experts below are selected from a list of 86274 Experts worldwide ranked by ideXlab platform
Yvo Desmedt - One of the best experts on this subject based on the ideXlab platform.
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unconditionally private and Reliable Communication in an untrusted network
Information Theory Workshop, 2005Co-Authors: Yvo DesmedtAbstract:Most successful attacks that occur today against computer networks are targeted against the computers connected to the network, but not against the routers. At the BlackHat 2005 conference it was shown that potential attacks against routers are far from hypothetical. Current TCP/IP protocols (even including IPSEC) do not have the resilience to deal with routers taken over by the adversary. We survey the research done in the area of how to communicate reliably and/or privately. In the presence of different types of adversary, for example a malicious (Byzantine) one. Evidently, if the adversary can control all nodes (routers) in the network, no solution exists. The nodes that can be attacked by the adversary can be described using a threshold, or by what is called an adversary structure. The type of networks studied are point-to-point or broadcast/multicast
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COCOON - Radio networks with Reliable Communication
Lecture Notes in Computer Science, 2005Co-Authors: Yvo Desmedt, Yongge Wang, Rei Safavi-naini, Huaxiong WangAbstract:Problems of secure Communication and computation have been studied extensively in network models, for example, Franklin and Yung have studied secure Communications in the general networks modeled by hypergraphs. Radio networks have received special attention in recent years. For example, the Bluetooth and IEEE 802.11 networks are all based on radio network technologies. In this paper, we use directed colored-edge multigraphs to model the radio networks and study Reliable and private message transmissions in radio networks.
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ICITS - Unconditionally private and Reliable Communication in an untrusted network
IEEE Information Theory Workshop on Theory and Practice in Information-Theoretic Security 2005., 1Co-Authors: Yvo DesmedtAbstract:Most successful attacks that occur today against computer networks are targeted against the computers connected to the network, but not against the routers. At the BlackHat 2005 conference it was shown that potential attacks against routers are far from hypothetical. Current TCP/IP protocols (even including IPSEC) do not have the resilience to deal with routers taken over by the adversary. We survey the research done in the area of how to communicate reliably and/or privately. In the presence of different types of adversary, for example a malicious (Byzantine) one. Evidently, if the adversary can control all nodes (routers) in the network, no solution exists. The nodes that can be attacked by the adversary can be described using a threshold, or by what is called an adversary structure. The type of networks studied are point-to-point or broadcast/multicast
Thomas Pfeiffenberger - One of the best experts on this subject based on the ideXlab platform.
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concepts for Reliable Communication in a software defined network architecture
International Conference on Computer Safety Reliability and Security, 2017Co-Authors: Ferdinand Von Tullenburg, Thomas PfeiffenbergerAbstract:Not available services or service interruption could have different impact to our social life. Emails or messages which are not delivered in a proper time-frame could lead to omit a meeting or a discussion with colleagues. Interconnected CPS in different domains, like autonomous driving, smart grids, Industry 4.0, needs a guaranteed and safe delivery of information.
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Concepts for Reliable Communication in a Software-Defined Network Architecture
Computer Safety Reliability and Security, 2017Co-Authors: Ferdinand Tüllenburg, Thomas PfeiffenbergerAbstract:Not available services or service interruption could have different impact to our social life. Emails or messages which are not delivered in a proper time-frame could lead to omit a meeting or a discussion with colleagues. Interconnected CPS in different domains, like autonomous driving, smart grids, Industry 4.0, needs a guaranteed and safe delivery of information.Nowadays distributed application in critical infrastructures such as transportation (e.g. air traffic management, train control, traffic management), financial services, or electricity systems, are often implemented in dedicated network infrastructures not using the public Internet. This leads to high expenditures (CAPEX and OPEX) for the companies to maintain these separated and dedicated teleCommunication infrastructure.Our approach in this work is to verify concepts to share the Internet, as a teleCommunication infrastructure for critical and non-critical applications. This reduces the effort to implement and to manage different Communication architectures. The present work develops and evaluates methods and procedures that enable high Reliable Communication between two endpoints over several shared teleCommunication networks for future critical and uncritical applications. Our approach shows that it is possible to use the public Internet for future Communication requirements in a converged network. Further innovations include the integration of novel network technologies, such as software-defined networks (SDN), programming protocol independent packet processors (P4), and self-adaptive and autonomous network management functions.
Venkatesan Guruswami - One of the best experts on this subject based on the ideXlab platform.
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polar codes Reliable Communication with complexity polynomial in the gap to shannon capacity invited talk
Foundations of Software Technology and Theoretical Computer Science, 2013Co-Authors: Venkatesan GuruswamiAbstract:Shannon's monumental 1948 work laid the foundations for the rich fields of information and coding theory. The quest for efficient coding schemes to approach Shannon capacity has occupied researchers ever since, with spectacular progress enabling the widespread use of error-correcting codes in practice. Yet the theoretical problem of approaching capacity arbitrarily closely with polynomial complexity remained open except in the special case of erasure channels. In 2008, Arikan proposed an insightful new method for constructing capacity-achieving codes based on channel polarization. In this talk, I will begin with a self-contained survey of Arikan's celebrated construction of polar codes, and then discuss our recent proof (with Patrick Xia) that, for all binary-input symmetric memoryless channels, polar codes enable Reliable Communication at rates within epsilon > 0 of the Shannon capacity with block length (delay), construction complexity, and decoding complexity all bounded by a polynomial in the gap to capacity, i.e., by poly(1/epsilon). Polar coding gives the first explicit construction with rigorous proofs of all these properties; previous constructions were not known to achieve capacity with less than exp(1/epsilon) decoding complexity. We establish the capacity-achieving property of polar codes via a direct analysis of the underlying martingale of conditional entropies, without relying on the martingale convergence theorem. This step gives rough polarization (noise levels epsilon for the good channels), which can then be adequately amplified by tracking the decay of the channel Bhattacharyya parameters. Our effective bounds imply that polar codes can have block length bounded by poly(1/epsilon). We also show that the generator matrix of such polar codes can be constructed in polynomial time by algorithmically computing an adequate approximation of the polarization process.
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FSTTCS - Polar Codes: Reliable Communication with Complexity Polynomial in the Gap to Shannon Capacity (Invited Talk)
2013Co-Authors: Venkatesan GuruswamiAbstract:Shannon's monumental 1948 work laid the foundations for the rich fields of information and coding theory. The quest for efficient coding schemes to approach Shannon capacity has occupied researchers ever since, with spectacular progress enabling the widespread use of error-correcting codes in practice. Yet the theoretical problem of approaching capacity arbitrarily closely with polynomial complexity remained open except in the special case of erasure channels. In 2008, Arikan proposed an insightful new method for constructing capacity-achieving codes based on channel polarization. In this talk, I will begin with a self-contained survey of Arikan's celebrated construction of polar codes, and then discuss our recent proof (with Patrick Xia) that, for all binary-input symmetric memoryless channels, polar codes enable Reliable Communication at rates within epsilon > 0 of the Shannon capacity with block length (delay), construction complexity, and decoding complexity all bounded by a polynomial in the gap to capacity, i.e., by poly(1/epsilon). Polar coding gives the first explicit construction with rigorous proofs of all these properties; previous constructions were not known to achieve capacity with less than exp(1/epsilon) decoding complexity. We establish the capacity-achieving property of polar codes via a direct analysis of the underlying martingale of conditional entropies, without relying on the martingale convergence theorem. This step gives rough polarization (noise levels epsilon for the good channels), which can then be adequately amplified by tracking the decay of the channel Bhattacharyya parameters. Our effective bounds imply that polar codes can have block length bounded by poly(1/epsilon). We also show that the generator matrix of such polar codes can be constructed in polynomial time by algorithmically computing an adequate approximation of the polarization process.
Hungyu Wei - One of the best experts on this subject based on the ideXlab platform.
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SDN - Architectural Enabler for Reliable Communication over Millimeter-Wave 5G Networks.
arXiv: Networking and Internet Architecture, 2018Co-Authors: Bibhudatta Sahoo, Chung-wei Weng, Hungyu WeiAbstract:Millimeter-wave (mmWave) frequency bands offer a new frontier for next-generation wireless networks, popularly known as 5G, to enable multi-gigabit Communication; however, the availability and reliability of mmWave signals are significantly limited due to its unfavorable propagation characteristics. Thus, mmWave networks rely on directional narrow-beam transmissions to overcome severe path-loss. To mitigate the impact of transmission-reception directionality and provide uninterrupted network services, ensuring the availability of mmWave transmission links is important. In this paper, we proposed a new flexible network architecture to provide efficient resource coordination among serving basestations during user mobility. The key idea of this holistic architecture is to exploit the software-defined networking (SDN) technology with mmWave Communication to provide a flexible and resilient network architecture. Besides, this paper presents an efficient and seamless uncoordinated network operation to support Reliable Communication in highly-dynamic environments characterized by high density and mobility of wireless devices. To warrant high-reliability and guard against the potential radio link failure, we introduce a new transmission framework to ensure that there is at least one basestation is connected to the UE at all times. We validate the proposed transmission scheme through simulations.
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GLOBECOM Workshops - SDN - Architectural Enabler for Reliable Communication Over Millimeter-Wave 5G Networks
2018 IEEE Globecom Workshops (GC Wkshps), 2018Co-Authors: Bibhudatta Sahoo, Chung-wei Weng, Hungyu WeiAbstract:Millimeter-wave (mmWave) frequency bands offer a new frontier for next-generation wireless networks, popularly known as 5G, to enable multi-gigabit Communication; however, the availability and reliability of mmWave signals are significantly limited due to its unfavorable propagation characteristics. Thus, mmWave networks rely on directional narrow-beam transmissions to overcome severe path-loss. To mitigate the impact of transmission-reception directionality and provide uninterrupted network services, ensuring the availability of mmWave transmission links is important. In this paper, we proposed a new flexible network architecture to provide efficient resource coordination among serving basestations during user mobility. The key idea of this holistic architecture is to exploit the software-defined networking (SDN) technology with mmWave Communication to provide a flexible and resilient network architecture. Besides, this paper presents an efficient and seamless uncoordinated network operation to support Reliable Communication in highly-dynamic environments characterized by high density and mobility of wireless devices. To warrant high-reliability and guard against the potential radio link failure, we introduce a new transmission framework to ensure that there is at least one basestation is connected to the UE at all times. We validate the proposed transmission scheme through simulations.
Bibhudatta Sahoo - One of the best experts on this subject based on the ideXlab platform.
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SDN - Architectural Enabler for Reliable Communication over Millimeter-Wave 5G Networks.
arXiv: Networking and Internet Architecture, 2018Co-Authors: Bibhudatta Sahoo, Chung-wei Weng, Hungyu WeiAbstract:Millimeter-wave (mmWave) frequency bands offer a new frontier for next-generation wireless networks, popularly known as 5G, to enable multi-gigabit Communication; however, the availability and reliability of mmWave signals are significantly limited due to its unfavorable propagation characteristics. Thus, mmWave networks rely on directional narrow-beam transmissions to overcome severe path-loss. To mitigate the impact of transmission-reception directionality and provide uninterrupted network services, ensuring the availability of mmWave transmission links is important. In this paper, we proposed a new flexible network architecture to provide efficient resource coordination among serving basestations during user mobility. The key idea of this holistic architecture is to exploit the software-defined networking (SDN) technology with mmWave Communication to provide a flexible and resilient network architecture. Besides, this paper presents an efficient and seamless uncoordinated network operation to support Reliable Communication in highly-dynamic environments characterized by high density and mobility of wireless devices. To warrant high-reliability and guard against the potential radio link failure, we introduce a new transmission framework to ensure that there is at least one basestation is connected to the UE at all times. We validate the proposed transmission scheme through simulations.
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GLOBECOM Workshops - SDN - Architectural Enabler for Reliable Communication Over Millimeter-Wave 5G Networks
2018 IEEE Globecom Workshops (GC Wkshps), 2018Co-Authors: Bibhudatta Sahoo, Chung-wei Weng, Hungyu WeiAbstract:Millimeter-wave (mmWave) frequency bands offer a new frontier for next-generation wireless networks, popularly known as 5G, to enable multi-gigabit Communication; however, the availability and reliability of mmWave signals are significantly limited due to its unfavorable propagation characteristics. Thus, mmWave networks rely on directional narrow-beam transmissions to overcome severe path-loss. To mitigate the impact of transmission-reception directionality and provide uninterrupted network services, ensuring the availability of mmWave transmission links is important. In this paper, we proposed a new flexible network architecture to provide efficient resource coordination among serving basestations during user mobility. The key idea of this holistic architecture is to exploit the software-defined networking (SDN) technology with mmWave Communication to provide a flexible and resilient network architecture. Besides, this paper presents an efficient and seamless uncoordinated network operation to support Reliable Communication in highly-dynamic environments characterized by high density and mobility of wireless devices. To warrant high-reliability and guard against the potential radio link failure, we introduce a new transmission framework to ensure that there is at least one basestation is connected to the UE at all times. We validate the proposed transmission scheme through simulations.
