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Efficient Certificateless Authenticated Key Agreement for Blockchain-Enabled Internet of Medical Things

Computers, Materials & Continua 2023年第4期75卷 2043-2059页

作者： Chaoyang Li Yanbu Guo Mianxiong Dong Gang Xu Xiu-Bo Chen Jian Li kaoru ota College of Software Engineering Zhengzhou University of Light IndustryZhengzhou450002China Department of Sciences and Informatics Muroran Institution of TechnologyMuroran050-8585Japan School of Computing Science and Technology North China University of TechnologyBeijing100144China Information Security Centre State Key Laboratory of Networking and Switching TechnologyBeijing University of Post and TelecommunicationsBeijing100876China

Internet of Medical Things(IoMT)plays an essential role in collecting and managing personal medical data.In recent years,blockchain technology has put power in traditional IoMT systems for data sharing between different medical institutions and improved the utilization of medical data.However,some problems in the information transfer process between wireless medical devices and mobile medical apps,such as information leakage and privacy disclosure.This paper first designs a cross-device key agreement model for blockchain-enabled IoMT.This model can establish a key agreement mechanism for secure medical data sharing.Meanwhile,a certificateless authenticated key agreement(KA)protocol has been proposed to strengthen the information transfer security in the cross-device key agreement model.The proposed KA protocol only requires one exchange of messages between the two parties,which can improve the protocol execution efficiency.Then,any unauthorized tampering of the transmitted signed message sent by the sender can be detected by the receiver,so this can guarantee the success of the establishment of a session key between the strange entities.The blockchain ledger can ensure that the medical data cannot be tampered with,and the certificateless mechanism can weaken the key escrow problem.Moreover,the security proof and performance analysis are given,which show that the proposed model and KA protocol are more secure and efficient than other schemes in similar literature.

关键词： Certificateless key agreement authentication blockchain internet of medical things

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A Broad Learning-Driven Network Traffic Analysis System Based on Fog Computing Paradigm

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China Communications 2020年第2期17卷 1-13页

作者： Xiting Peng kaoru ota Mianxiong Dong Department of Information and Electronic Engineering Muroran Institute of Technology

The development of communication technologies which support traffic-intensive applications presents new challenges in designing a real-time traffic analysis architecture and an accurate method that suitable for a wide variety of traffic types.Current traffic analysis methods are executed on the cloud,which needs to upload the traffic data.Fog computing is a more promising way to save bandwidth resources by offloading these tasks to the fog nodes.However,traffic analysis models based on traditional machine learning need to retrain all traffic data when updating the trained model,which are not suitable for fog computing due to the poor computing power.In this study,we design a novel fog computing based traffic analysis system using broad learning.For one thing,fog computing can provide a distributed architecture for saving the bandwidth resources.For another,we use the broad learning to incrementally train the traffic data,which is more suitable for fog computing because it can support incremental updates of models without retraining all data.We implement our system on the Raspberry Pi,and experimental results show that we have a 98%probability to accurately identify these traffic data.Moreover,our method has a faster training speed compared with Convolutional Neural Network(CNN).

关键词： traffic analysis fog computing broad learning radio access networks

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A Real Plug-and-Play Fog: Implementation of Service Placement in Wireless Multimedia Networks

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China Communications 2019年第10期16卷 191-201页

作者： Jianwen Xu kaoru ota Mianxiong Dong Department of Sciences and Informatics Muroran Institute of Technology

Initially as an extension of cloud computing, fog computing has been inspiring new ideas about moving computing tasks to the edge of networks. In fog, we often repeat the procedure of placing services because of the geographical distribution of mobile users. We may not expect a fixed demand and supply relationship between users and service providers since users always prefer nearby service with less time delay and transmission consumption. That is, a plug-and-play service mode is what we need in fog. In this paper, we put forward a dynamic placement strategy for fog service to guarantee the normal service provision and optimize the Quality of Service (QoS). The simulation results show that our strategy can achieve better performance under metrics including energy consumption and end-to-end latency. Moreover, we design a real Plug-and-Play Fog (PnPF) based on Raspberry Pi and OpenWrt to provide fog services for wireless multimedia networks.

关键词： wireless multimedia networks fog computing service placement quality of service

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Energy Efficiency of a Multi-Core Processor by Tag Reduction

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Journal of Computer Science & Technology 2011年第3期26卷 491-503页

作者：郑龙董冕雄 kaoru ota 金海 Song Guo 马俊 School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China School of Computer Science and Engineering The University of Aizu Aizu-Wakamatsu 965-8580 Japan Department of Electrical and Computer Engineering University of Waterloo N2L 3G1 Canada Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China

We consider the energy saving problem for caches on a multi-core processor. In the previous research on low power processors, there are various methods to reduce power dissipation. Tag reduction is one of them. This paper extends the tag reduction technique on a single-core processor to a multi-core processor and investigates the potential of energy saving for multi-core processors. We formulate our approach as an equivalent problem which is to find an assignment of the whole instruction pages in the physical memory to a set of cores such that the tag-reduction conflicts for each core can be mostly avoided or reduced. We then propose three algorithms using different heuristics for this assignment problem. We provide convincing experimental results by collecting experimental data from a real operating system instead of the traditional way using a processor simulator that cannot simulate operating system functions and the full memory hierarchy. Experimental results show that our proposed algorithms can save total energy up to 83.93% on an 8-core processor and 76.16% on a 4-core processor in average compared to the one that the tag-reduction is not used for. They also significantly outperform the tag reduction based algorithm on a single-core processor.

关键词： tag reduction multi-core processor energy efficiency

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Event-Oriented Dynamic Security Service for Demand Response in Smart Grid Employing Mobile Networks

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China Communications 2015年第12期12卷 63-75页

作者： GUO Longhua DONG Mianxiong kaoru ota WU Jun LI Jianhua School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Department of Information and ElectronicEngineering Muroran Institute of Technology

Equipped with millions of sensors and smart meters in smart gird,a reliable and resilient wireless communication technology is badly needed.Mobile networks are among the major energy communication networks which contribute to global energy consumption increase rapidly.As one of core technologies of smart grid employing mobile networks,Demand Response(DR) helps improving efficiency,reliability and security for electric power grid infrastructure.Security of DR events is one of the most important issues in DR.However,the security requirements of different DR events are dynamic for variousactual demands.To address this,an event-oriented dynamic security service mechanism is proposed for DR.Three kinds of security services including security access service,security communication service and security analysis service for DR event are composited dynamically by the fine-grained sub services.An experiment prototype of the network of State Grid Corporation of China(SGCC) is established.Experiment and evaluations shows the feasibility and effectiveness of the proposed scheme in smart grid employing mobile network.

关键词：国家电网公司安全服务智能电表需求响应事件无线通信技术移动网络通信网络

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SIoTFog:具备拜占庭容错机制的物联网雾计算网络（英文）

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Frontiers of Information Technology & Electronic Engineering 2018年第12期19卷 1546-1557页

作者： Jian-wen XU kaoru ota Mian-xiong DONG An-feng LIU Qiang LI Department of Information and Electronic Engineering Muroran Institute of Technology School of Information Science and Engineering Central South University MOE Key Laboratory of Symbol Computation and Knowledge Engineering Jilin University

物联网技术爆炸式发展,从可穿戴设备到车辆互联,再到智慧城市等方面,正在改变人们的日常生活。过去,人们习惯将雾计算看作云计算的延伸;事实上,雾计算逐渐成为传输、处理分布式大数据的理想解决办法。提出一种考虑拜占庭容错的组网方法... 详细信息

物联网技术爆炸式发展,从可穿戴设备到车辆互联,再到智慧城市等方面,正在改变人们的日常生活。过去,人们习惯将雾计算看作云计算的延伸;事实上,雾计算逐渐成为传输、处理分布式大数据的理想解决办法。提出一种考虑拜占庭容错的组网方法,以及两种针对物联网雾计算的资源分配算法。目的是设计一个称作"SIoTFog"的安全雾计算网络,能够抵御拜占庭错误影响并提高传输、处理物联网大数据的效率。考虑两种情况,即面对单一拜占庭错误和多拜占庭错误的不同隐患时,比较算法性能。选择时延、传输时总转发跳数和设备利用率作为性能指标。仿真结果表明,该方法可助力实现高效、可靠的雾计算网络。

关键词： Byzantine fault tolerance Fog computing Resource allocation Intemet of Things (IoT)

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Techniques for Avoiding Saccular Extended Obstruction at the Anastomotic Site of Functional End-to-End Anastomosis

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Surgical Science 2017年第7期8卷 305-311页

作者： Koichi Yoshida Kenichi Ietsugu Jyunpei Okamoto Saki Hayashi Yoshihide Asaumi Naohiro ota Hiroyuki Sugawara Satoshi Tabata Masahiro Kaneki Mitsuaki Sakatoku kaoru Kiyohara Department of Surgery Tonami General Hospital Toyama Japan

Saccular extended obstruction is generated when the anastomotic site of functional end-to-end anastomosis is extended saccularly and blocked by intestinal contents. This is a specific complication of functional end-to-end anastomosis. Saccular extended obstruction of the anastomotic site of func-tional end-to-end anastomosis causes postoperative intestinal obstruction. Saccular extended obstruction places a heavy burden on patients because surgery is necessary for treatment of intestinal obstruction due to saccular extended obstruction. However, saccular extended obstruction is not a commonly recognized complication. The greatest factor contributing to the development of saccular extended obstruction is an acute angle between the portions of the intestinal tract oral and aboral to the anastomotic site. When this angle approaches obtuse angle, preferably close to a straight line, stagnation of the intestinal contents does not occur at the anastomotic site of functional end-to-end anastomosis and saccular extended obstruction is avoided. For making the angle of anastomotic intestinal tracts obtuse or straight, it may be effective that the entry hole of stapling suture instrument creating the anastomotic stoma is closed perpendicular to the intestinal axis.

关键词： Functional End-to-End Anastomosis Stapling Anastomosis Anastomosis Postoperative Complication Intestinal Obstruction

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