一种无线传感器网络的密钥管理机制

介绍了一种用于无线传感器网络(WSNs)的密钥预分配机制:多密钥空间哈希随机密钥预分配(HARPMS)机制。该机制针对group-based节点投放模型,将密钥空间划分成多个子空间,在密钥分配和建立时使用Hash链技术,以提高网络的抗节点俘获能力。分析表明:相比传统的用于group-based投放模型的随机密钥预分配机制,HARPMS获得了同等的连通性,但却有更好的抗节点俘获能力。     

Autoregressive energy-efficient context forwarding in wireless sensor networks for pervasive healthcare systems

Driven by technological advances in low-power network systems and medical sensors, we have witnessed during the recent years the adoption of wireless sensor networks (WSNs) in electronic healthcare. Improving the quality of electronic healthcare and the prospects of ‘ageing in place’ through WSNs requires solving difficult problems in scale, energy management, and data acquisition. Medical and pervasive healthcare application (or mobile healthcare application) based on WSNs is influenced by many factors such as transmission errors and power consumption. We propose a multivariate context forwarding model that achieves energy-efficient WSN operation. A node adopts multivariate autoregression for forecasting contextual information (bio-signals or vital parameters) and locally decides whether context retransmission is required or not. This scheme is applied in patient telemonitoring systems where accurate yet energy-aware transmission of bio-signals to a remote control unit is crucial. Simulation results are reported indicating the capability of the proposed model in minimizing energy consumption in WSNs having as application domain the electronic healthcare systems.     

Virtual reality in the context of Internet of Things

In order to improve the user experience and efficiency of human–computer interaction in virtual reality technology, a comprehensive technology combined with high-tech achievements of multi-field is studied under the background of Internet of Things to realize the interaction between human and computer in a natural and intelligent way. The research results show that the interactive, simulated natural-state and three-dimensional environment can be formed at the display terminal through the processing and operation of information by computer program, which can make people feel immersed. It can be seen that in the environment of Internet of Things, the research on virtual reality technology should not only lay out top-level design and improve security and transmission efficiency, but also promote industrial application and enhance user stickiness. It would help to reveal the development trend of technology and the industrial layout and help relevant subjects to improve their level of technology R&D (research and development) and formulate competitive offensive and defensive strategies.

     

物联网关键技术研究

针对近年来人们广泛关注的物联网,分析讨论了制约物联网发展应用的关键技术,包括感知技术、网络通信技术、数据融合与智能技术,以及云计算等。这些技术将对物联网的发展和应用乃至人类生活、工业发展、科技进步起到至关重要的促进作用。     

基于group-based模型的无线传感器网络密钥管理方案

由于无线传感器网络受电源、计算能力、内存容量等方面的限制,传统的基于公钥和可信任的密钥管理方式不再适用.为了进一步提高无线传感器网络的安全连通性,在分析DU Wen-liang等人的group-based节点投放模型的基础上,提出了一种改进的密钥管理方案:多密钥空间与多路径增强相结合的随机密钥预分配方案.结果分析表明,该方案需要较少的内存存储空间,不仅提高了系统的连通性,还降低了节点的被捕获概率.     

物联网发展关键技术研究

物联网发展的关键在于解决核心技术中存在的难点。重点研究了RFID、无线传感器网络和语义网格等物联网关键技术,采用融合多种关键技术解决了物联网应用难的问题。语义网格融合了语义Web机器可阅读和网格技术强大的计算能力;语义P2P技术解决了信息过载通信瓶颈问题,大大方便了传感器节点的部署以及传感器网络的扩展;采用本体技术实现了物联网中的信息语义的交互和共享,为物联网中信息的及时、无歧义理解提供了便利。     

Multivariate context collection in mobile sensor networks

We focus on the treatment of quality-stamped contextual information in mobile sensor networks. Sensing nodes capture and forward context for consumption by mobile context aware applications. Due to the dynamic network topology the quality indicators seen by consumers vary over time. Context quality is a decreasing function of time and context can be consumed with a certain delay from its capturing time. We propose the sequential assessment of the network-circulated context information according to the Generalized Secretary Problem, a known paradigm in the Optimal Stopping Theory. The consumer node delays the processing (consumption) of incoming context until better quality is attained. We extend this basic model to include the cardinality of contextual components (i.e., different types of measurements coming from, possibly, different sources). Hence, the consumer node is interested not only in the higher possible quality of context but also in the widest possible range of context parameters (context “quantity”). We compare our findings to simple consumption strategies and pinpoint the advantages of the proposed model.     

物联网中无线传感器网络的安全技术

物联网被誉为信息革命的第三次浪潮,它的发展将产生巨大的社会效益和经济效益。伴随着物联网在各个领域的成功应用,安全问题也日趋显现。无线传感器网络由于在物联网中担当链接传统网络重任,安全问题尤其突出。文章以无线传感器网络的结构、特征为基础,分析了物联网所面临的安全挑战,并研究了其中的关键安全技术。     

Benchmarking large-scale data management for Internet of Things

The Journal of Supercomputing - In the current era of the Internet of Things (IoT), massive number of sensors are used in our daily lives. Sensors are everywhere around us. They exist in our homes,...     

物联网发展阶段及其关键技术

互联网实现了人与人之间的信息交换,那么物与物之间以及物与人间的信息交换靠什么来实现呢?那就是物联网。本文论述了物联网的实现阶段、工作原理以及物联网的关键技术。     

物联网实现的关键技术研究

近几年方兴未艾的物联网,是通过赋予物品唯一可区别的产品电子编码(EPC),可借助射频识别技术(RFID)收集数据,以互联网为平台,实现数据在供应链之间的互换和共享,从而大大减轻传统供应链中信息不对称和高成本的问题;文中从宏观结构的角度,先分析了EPC网络的结构模型,然后主要介绍Savant结构及其中间件技术、域名服务系统及其工作流程和物理标记语言(PML)技术的组成和设计,最后对物联网的未来发展以及主要所面临的挑战作了简要的评述和展望.     

SINGLETON: A lightweight and secure end-to-end encryption protocol for the sensor networks in the Internet of Things based on cryptographic ratchets

For many systems, safe connectivity is an important requirement, even if the transmitting machines are resource-constrained. The advent of the Internet of Things (IoT) has also increased the demand for low-power devices capable of connecting with each other or sending data to a central processing site. The IoT allows many applications in a smart environment, such as outdoor activity control, smart energy, infrastructure management, environmental sensing, or cyber-security issues. Security in such situations remains an open challenge because of the resource-constrained design of sensors and objects, or the multi-purpose adversaries may target the process during the life cycle of a smart sensor. This paper discusses widely used protocols that provide safe communications for various applications in IoT and also different attacks are defined. In this paper, to protect the IoT objects and sensors, we propose a comprehensive and lightweight security protocol based on Cryptographic Ratchets. That is, an encrypted messaging protocol using the Double Ratchet Algorithm is defined which we call Singleton, and the implementation of protocol is tested and compared to the implementation of the IoT standard protocols and a post-quantum version of the protocol. Various cryptographic primitives are also evaluated, and their suitability for use in the protocol is tested. The results show that the protocol as the building stone not only enables efficient resource-wise protocols and architectures but also provides advanced and scalable IoT sensors. Our design and analysis demonstrate that Singleton security architecture can be easily integrated into existing network protocols such as IEEE 802.15.4 or OMA LWM2M, which offers several benefits that existing approaches cannot offer both performance and important security services. For chat applications such as WhatsApp, Skype, Facebook Private Messenger, Google Allo, and Signal, a cryptographic ratchet-based protocol provides end-to-end encryption, forward secrecy, backward secrecy, authentication, and deniability.

     

基于环-树型拓扑的无线传感网密钥管理方案

设计了一种基于无线传感网的拓扑模型--环-树型网络拓扑模型.基于该模型,结合节点命名机制,提出了一种新的密钥管理方案.该方案在拓扑结构上改变传统的三层分簇拓扑为四层分簇拓扑,在路由安全问题上采用二次核实机制.经仿真工具OMNET++实验,较传统的三层分簇拓扑模型,该方案的网络拓扑模型延长了第一个节点的死亡时间,且整个网络具有更长的生命周期和更好的安全保证.     

物联网时代传感器低成本化发展的思考

在对物联网产业的内涵、体系结构进行系统阐述和分析基础上,阐述了传感器与物联网的关系以及传感器在物联网中的战略意义,分析了传感器技术的低成本化发展方向,并提出了一些低成本化措施。     

物联网关键技术及其发展探讨

本文分析了物联网的技术架构、物联网的关键技术、物联网的安全问题研究、物联网发展面临的问题及其解决措施.为物联网相关问题的探讨奠定了理论基础.     

基于分层的传感器网络密钥预分配方案

在基于部署知识的密钥预分配方案中,随着节点部署误差的增大,网络的局部连通率将显著下降,从而导致网络的全局连通率下降。为了减轻部署误差对方案性能的影响,提出了一种新的密钥预分配模型。该模型将部署区域划分成基本区和联系区,联系区根据离基本区的远近分层,并在此基础上提出了一种新的密钥预分配方案。分析和模拟表明:与直接利用部署知识的方案相比,基于分层的密钥管理方案可以显著地提高网络的性能。     

物联网时代的智能家居系统

目前智能家居中的智能化已经不是单纯的高新技术产品的简单合成,而是利用这些高新技术产品进行网络连接并集成各子系统,以最终在节能的主导思想下以最小的经济投入为人们提供一个最大安全的、高效便捷的、健康舒适的工作及生活环境。文中简要介绍了智能家居的产生、发展和定义,并在此基础上,论述了未来物联网时代智能家居的结构组成及发展趋势。     

物联网在图书馆管理中的关键技术分析

物联网是继计算机、互联网之后世界信息技术的第三次革命,是将信息化技术的应 用更加全面地为人类生活和生产服务的信息化大升级,其开发应用前景巨大.目前世界各国已将发展物联网提升为重要的国家发展战略,在我国物联网已成为信息产业中的下一个战略高点.本文用通俗易懂的语言向读者介绍物联网的体系架构,结合现代图书馆管理分析物联网的关键技术,为物联网更加广泛的普及和应用打好基础.     

物联网关键技术在智能家居中的应用

当代社会正朝着多元化的方向发展,各种高新技术层出不穷,极大丰富了人们的日常生活,无论是工作学习还是生活各方面,都被各种新型技术包围。物联网是网络技术中一个初露锋芒的新兴技术,能把人们现实生活中的物质和与生活相关的实体化的产品用网络技术表达,从而方便人们的生活。将物联网技术应用到人们的家庭生活,使生活中所应用的家具等朝着自动化、人性化、智能化的方向发展,使人们的生活更加方便和快捷,打造真正的智能家居。笔者针对物联网技术在智能家居上的应用展开了详细研究。     

基于PLCC的物联网传感器节点的设计

提出并设计了一种基于PLCC的物联网传感器节点,该设计能够稳定可靠地采集、传输信息,具有可灵活配置节点参数、外接多种传感器件、远程控制执行部件动作、无需新建信息传输通道等特点.对设计的传感器节点进行了实验测试,证明了设计工作的正确性和传感器节点的适用性.