共查询到20条相似文献,搜索用时 10 毫秒
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Kagal Lalana Korolev Vladimir Avancha Sasikanth Joshi Anupam Finin Tim Yesha Yelena 《Wireless Networks》2002,8(6):619-635
In the near future, we will see dramatic changes in computing and networking hardware. A large number of devices (e.g., phones, PDAs, even small household appliances) will become computationally enabled. Micro/nano sensors will be widely embedded in most engineered artifacts, from the clothes we wear to the roads we drive on. All of these devices will be (wirelessly) networked using Bluetooth, IEEE 802.15 or IEEE 802.11 for short range connectivity creating pervasive environments. In this age where a large number of wirelessly networked appliances and devices are becoming commonplace, there is a necessity for providing a standard interface to them that is easily accessible by any user. This paper outlines the design of Centaurus, an infrastructure for presenting services to heterogeneous mobile clients in a physical space via some short range wireless links. The infrastructure is communication medium independent; we have implemented the system over Bluetooth, CDPD and Infrared, three well-known wireless technologies. All the components in our model use a language based on Extensible Markup Language (XML) for communication, giving the system a uniform and easily adaptable interface. Centaurus defines a uniform infrastructure for heterogeneous services, both hardware and software, to be made available to diverse mobile users within a confined space. 相似文献
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This paper presents a piecewise framework for network awareness service (NAS) for wireless/mobile pervasive computing. We investigate how piecewise consideration of wired and wireless elements of the framework architecture benefits service advertisement and discovery and network-awareness techniques. We also discuss scalability of the NAS framework with respect to platform computing capabilities. The framework is suitable for a wide range of computing devices, from powerful ones with multi-tasking operating systems (OS) to small ones with lightweight OS. Case studies applying the NAS framework to sensor monitoring in home networks and data streaming in pervasive multimedia computing are presented. The analytical results on the performance of the NAS framework in these case studies show that it has significant advantages over traditional network-awareness frameworks in terms of reducing wireless bandwidth consumption and saving battery energy of mobile devices. 相似文献
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Privacy-enhanced,Attack-resilient Access Control in Pervasive Computing Environments with Optional Context Authentication Capability 总被引:1,自引:0,他引:1
In pervasive computing environments (PCEs), privacy and security are two important but contradictory objectives. Users enjoy
services provided in PCEs only after their privacy issues being sufficiently addressed. That is, users could not be tracked
down for wherever they are and whatever they are doing. However, service providers always want to authenticate the users and
make sure they are accessing only authorized services in a legitimate way. In PCEs, such user authentication may include context
authentication in addition to the entity authentication. In this paper, we propose a novel privacy enhanced anonymous authentication
and access control scheme to secure the interactions between mobile users and services in PCEs with optional context authentication
capability. The proposed scheme seamlessly integrates two underlying cryptographic primitives, blind signature and hash chain,
into a highly flexible and lightweight authentication and key establishment protocol. It provides explicit mutual authentication
and allows multiple current sessions between a user and a service, while allowing the user to anonymously interact with the
service. The proposed scheme is also designed to be DoS resilient by requiring the user to prove her legitimacy when initializing
a service session.
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Wenjing LouEmail: |
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刘丁 《微电子学与计算机》2010,27(1)
提出一种面向普适计算的动态多级安全访问控制新方案,形式化描述了访问控制的构成要素,定义了动态访问控制策略,最后给出了授权实现算法.方案既保证了授权的动态性,又增强了访问控制的安全性,更适合于普适计算环境. 相似文献
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普适计算的发展加速了计算模式的革新,但安全性方面的挑战成为制约其发展的瓶颈。信息安全对以嵌入式控制为主的普适计算系统的正常工作有着重要意义。由于隐秘通道存在着私人信息泄漏的可能,而规避周界安全的隐秘通道技术的研究尚未得到应有的重视。文中提出基于无线传感器的隐秘通道安全技术,以一种无法被其它系统所探知的方式,对无线传感器参数数据进行优化调整,以可见的数据加密方式,实现隐秘通道传送,为确保普适计算系统的信息安全提供了参考。 相似文献
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葛澎 《微电子学与计算机》2012,29(5):201-204
分布式计算已经广泛而又深入的参透到各行各业的科技应用中.本文对几种主要的分布式计算技术,如网格、云计算、普适计算等,做了分析和比较,同时对分布式计算目前所面临的问题做了总结.最后对分布式计算技术未来的发展方向做了展望与预测. 相似文献
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多通道交互是普适计算人机交互中一个新的发展趋势,国际标准化组织W3C公布的多通道交互协议旨在开发支持普适计算设备多通道交互的通用协议标准。本文对此标准协议中的多通道交互基本框架进行了分析,并提出了此框架中,环境上下文在交互管理构件和系统环境构件中与用户输入输出信息的融合框架。在此框架基础上对驾驶导航(Driving Direction)实例进行分析。 相似文献
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Security is a key problem for the development of Cloud Computing. A common service security architecture is a basic abstract to support security research work. The authorization ability in the service security faces more complex and variable users and environment. Based on the multidimensional views , the service security architecture is described on three dimensions of service security requirement integrating security attributes and service layers . An attribute-based dynamic access control model is presented to detail the relationships among subjects , objects , roles , attributes , context and extra factors further. The model uses dynamic control policies to support the multiple roles and flexible authority. At last, access control and policies execution mechanism were studied as the implementation suggestion. 相似文献
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Olga Ratsimor Dipanjan Chakraborty Anupam Joshi Timothy Finin Yelena Yesha 《Mobile Networks and Applications》2004,9(6):679-692
Directory based service discovery mechanisms are unsuitable for ad-hoc m-commerce environments. Working towards finding an alternate mechanism, we developed Allia: a peer-to-peer caching based and policy-driven agent-service discovery framework that facilitates cross-platform service discovery in ad-hoc environments. Our approach achieves a high degree of flexibility in adapting itself to changes in ad-hoc environments and is devoid of common problems associated with structured compound formation in mobile commerce environments. Device capabilities and limitations, user preferences regarding device usage, application specifics with respect to mobile commerce are factors that our framework adapts to. We have described our initial implementation of Allia over ThinkPads and iPAQs by extending the LEAP Agent Platform and using Bluetooth as the underlying network protocol. In addition, we evaluated Allia's performance by running simulations of our protocol in Glomosim simulator. We also compared our framework against a structured compound-based architecture. 相似文献
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嵌入式数据库技术是整个普适计算系统正常工作中的重要一环。在讨论了普适计算和嵌入式数据库的关系之后,简单介绍了嵌入式数据库的特点和关键技术,重点分析了普适计算环境对嵌入式数据库的要求及所面临的研究问题,并给出了使用DB2 EveryPlace建立嵌入式数据库系统应用的步骤,展望了普适计算与嵌入式数据库技术结合的应用前景和需要解决的一些课题。 相似文献
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安全桌面云计算架构解决方案 总被引:1,自引:0,他引:1
钟博 《信息安全与通信保密》2012,(11):31-34
当前,很多企业和行业用户纷纷采用桌面云计算技术改造或建设自身的信息化基础设施,以期提高信息系统治理水平,减少信息外泄的途径。随着虚拟化等关键技术的引入,桌面云计算架构也面临着新的安全风险,针对桌面云计算架构所面临的安全风险提出了较为完整的解决方案,远程用户可以基于此随时随地利用有线/无线等多种网络接入方式访问后台数据中心,如同在本地一样操作各类业务。 相似文献
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Friday Adrian Davies Nigel Wallbank Nat Catterall Elaine Pink Stephen 《Wireless Networks》2004,10(6):631-641
In this paper, we contend that ubiquitous computing environments will be highly heterogeneous, service rich domains. Moreover, future applications will consequently be required to interact with multiple, specialised service location and interaction protocols simultaneously. We argue that existing service discovery techniques do not provide sufficient support to address the challenges of building applications targeted to these emerging environments.This paper makes a number of contributions. Firstly, using a set of short ubiquitous computing scenarios we identify several key limitations of existing service discovery approaches that reduce their ability to support ubiquitous computing applications. Secondly, we present a detailed analysis of requirements for providing effective support in this domain. Thirdly, we provide the design of a simple extensible meta-service discovery architecture that uses database techniques to unify service discovery protocols and addresses several of our key requirements. Lastly, we examine the lessons learnt through the development of a prototype implementation of our architecture. 相似文献
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An Architecture for Secure Wide-Area Service Discovery 总被引:4,自引:0,他引:4
Hodes Todd D. Czerwinski Steven E. Zhao Ben Y. Joseph Anthony D. Katz Randy H. 《Wireless Networks》2002,8(2-3):213-230
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基于XML实现液晶编程的一种新方法 总被引:1,自引:1,他引:0
针对传统液晶显示编程工作量大、繁琐,且程序形成后,再进行修改比较困难的缺点,提出了基于可扩展标志语言(Extensible Markup Language,XML)技术编程的一种新方法。这种方法把显示内容和显示算法分开,由Pc绘制显示内容并转换成基于XML标准的文件存储到单片机的ROM中,而显示算法只需根据显示文件的格式进行判断调用相应的函数。这种运用XML技术实现液晶显示编程,不仅提高编程的效率、增强程序的可维护性,而且大大减小程序占用的空间。 相似文献
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提出了一个普适环境下服务组合的框架,使用抽象状态机对服务的行为进行不同精化层级的形式化描述,然后利用 CoreASM 这一模型检测工具对服务组合进行模拟执行验证,从而验证服务组合的正确性.最后给出了一个运用此方法进行服务组合验证的典型应用场景. 相似文献