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Pervasive geo-security - a lightweight triple-A approach to securing distributed geo-service infrastructures

International Journal of Digital Earth 2014年第5期7卷 373-390页

作者： Bernd Resch Bernhard Schulz Manfred Mittlboeck Thomas Heistracher Research Studio iSPACE Research Studios AustriaSalzburgAustria SENSEable City Laboratory Massachusetts Institute of TechnologyBostonMAUSA Department of Information Technology and Systems Management University of Applied SciencesSalzburgAustria

Security has recently become a major concern in distributed geo-infrastructures for spatial data ***,a lightweight approach for securing distributed low-power environments such as geo-sensor networks is *** first part of this article presents a survey of current security mechanisms for authentication and *** on this survey,a lightweight and scalable token-based security infrastructure was developed,which is tailored for use in distributed geo-web service *** developed security framework comprises dedicated components for authentication,rule-based authorisation and optimised storage and administration of access *** validation purposes,a prototypical implementation of the approach has been created.

关键词： pervasive security distributed geo-service infrastructures triple-A geo-authorisation standardised sensor networks service protection Geographic Information Systems(GIS) geoinformatics spatial data infrastructure Digital Earth Digital Earth Architecture

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Joint Allocation of Computing and Connectivity Resources in Survivable Inter-Datacenter Elastic Optical Networks

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China Communications 2024年第8期21卷 172-181页

作者： Yang Tao Li Yang Chen Xue State Key Lab of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China Cloud Network Department China Telecom Group Beijing CorporationBeijing 100010China

Inter-datacenter elastic optical networks(EON)need to provide the service for the requests of cloud computing that require not only connectivity and computing resources but also network *** this paper,to realize joint allocation of computing and connectivity resources in survivable inter-datacenter EONs,a survivable routing,modulation level,spectrum,and computing resource allocation algorithm(SRMLSCRA)algorithm and three datacenter selection strategies,*** Resource First(CRF),Shortest Path First(SPF)and Random Destination(RD),are proposed for different *** and manycast are applied to the communication of computing requests,and the routing strategies are calculated *** results show that SRMLCRA-CRF can serve the largest amount of protected computing tasks,and the requested calculation blocking probability is reduced by 29.2%,28.3%and 30.5%compared with SRMLSCRA-SPF,SRMLSCRA-RD and the benchmark EPS-RMSA algorithms ***,it is more applicable to the networks with huge ***,SRMLSCRA-SPF consumes the least spectrum,thereby exhibiting its suitability for scenarios where the amount of calculation is small and communication resources are *** results demonstrate that the proposed methods realize the joint allocation of computing and connectivity resources,and could provide efficient protection for services under single-link failure and occupy less spectrum.

关键词： computing and connectivity interdatacenter networks joint resource allocation service protection

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