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1.
对于轻量级RFID系统的认证协议的研究,既要考虑标签与读写器之间的无线通信的安全性问题,又需要兼顾系统在计算量、存储量和通信量等方面的硬件资源限制。该文针对现有的轻量级RFID安全协议存在的缺陷,提出了一种基于SASI的轻量级RFID双向认证协议,并对协议的安全性进行了分析。  相似文献   

2.
针对文献[13]提出的RFID认证协议存在无法抗异步攻击的缺陷,在此协议基础上,设计一种能抵抗异步攻击的认证协议.该协议摒弃原协议采用的哈希函数加密策略,选择超轻量级的字合成运算对传送消息进行加密;设计协议为能够抵抗异步攻击,前后两次通信认证用到的共享密钥均存放于读写器中,标签一端引入计数器Q对最后一轮读写器发送给标签的消息进行计数.基于逻辑BAN形式化分析协议,给出严谨的推理过程;基于安全性分析,表明该协议具备一定的安全性;基于性能对比,说明其能够适用于当前低成本的系统中.  相似文献   

3.
分析EPC-C1G2标准认证机制和现有改进方案,针对超高频射频识别(RFID)认证机制存在的安全缺陷,提出一种轻量级RFID认证方案。该方案实现了读写器和标签的双向认证,其轻量级加密算法能在一定程度上保证消息的安全传输。分析结果表明该方案具有较高安全性,能满足超高频RFID的安全需求。  相似文献   

4.
胡韬  魏国珩 《计算机应用》2012,32(1):111-114
为消除目前现有低成本无线射频识别(RFID)认证协议存在的各种安全隐患,解决认证协议所忽视的针对后端数据库的拒绝服务攻击问题,使用简单的逻辑运算以及读写器的屏蔽操作,以两个16位循环冗余校验(CRC)函数消息的级联作为标签与读写器相互认证因子,设计了一种新的基于低成本标签的RFID匿名双向认证协议,并对其进行了性能分析。分析结果表明,所提协议能够抵抗重放攻击和同步攻击,具备不可追踪性、真实性和服务的可用性,是一个比较安全、高效、实用的RFID低功耗安全认证方案。  相似文献   

5.
针对RFID认证协议存在安全缺陷或认证效率低等问题,提出了一种改进的基于字合成运算的移动双向认证协议,实现标签、读写器、后台数据库三者之间的相互认证。在改进的协议中,利用不同的随机数来保持标签、读写器、后台数据库消息的实时性,充分利用读写器和标签的标识符,结合字合成运算实现对传输信息的加密,从而强化三者之间的身份认证。与原协议进行安全性及性能比较,改进的协议不仅弥补了原协议中存在的安全漏洞,且在计算量方面要优于原协议。  相似文献   

6.
针对射频识别(RFID)系统在计算与存储资源有限情况下的特殊需求,提出一种基于公钥密码体制NTRU的轻权认证协议。在该协议中,标签和读写器均完成一次随机数生成操作,且仅在服务器端存储一个密钥对,各个RFID标签采用公钥进行消息加密并发送给读写器和服务器,服务器通过存储在本地的私钥进行解密,在标签端仅存储服务器的公钥,以确保认证过程中信息的保密传输和隐私性,实现标签与读写器间的相互认证。通过分析证实,该协议能够抵抗窃听、位置追踪、重放、反向跟踪等攻击,而且标签仅需提供轻权加密和随机数生成操作,该认证协议非常适合应用于低成本的RFID系统。  相似文献   

7.
翟黎 《软件学报》2015,26(12):3215-3222
基于对称密码体系的RFID隐私保护认证协议的构造是学术界和工业界研究的热点问题.具有完整性隐私保护协议的效率不够高效,需要对系统中所有的标签进行穷尽搜索,难以应用于物联网海量终端的环境.给出了一种高效的RFID隐私保护认证协议的构造方法.构造的协议采用了单比特输出的伪随机函数,将协议的认证过程分解为多个步骤,与传统的基于对称密码体系的RFID认证协议相比,构造的协议显著提高了读写器对标签的搜索效率.构造的协议具有隐私性,并且计算开销小,读写器端对标签的搜索效率高,能够很好地应用于海量终端的物联网环境.  相似文献   

8.
一种改进的超轻量级RFID认证协议   总被引:2,自引:0,他引:2  
针对当前超轻量级RFID认证协议中存在的安全缺陷,提出一种改进的超轻量级RFID双向认证协议。通过引入新的函数,使消息之间的数学关联性更加复杂,避免了泄露标签标识符,提高了阅读器和标签在开放环境中通信的保密性。对该协议的安全性和效率进行分析,并利用OPNET软件对该协议仿真实验,结果表明,该协议能抵抗代数攻击,重传攻击,假冒攻击等多种常见恶意攻击,在同等计算量下具有更高的安全性,可用于实际的移动身份认证环境。  相似文献   

9.
刘亚丽  秦小麟  王超 《计算机科学》2013,40(12):141-146
开放的无线通信环境,尤其是阅读器和标签间的无线信道,使得无线射频识别(RFID)系统的安全和隐私问题逐渐成为值得关注的焦点,因此设计抗各种恶意攻击和安全威胁的超轻量级RFID 认证协议是非常必要的。针对低代价标签提出了一种新的超轻量级RFID双向认证协议,该协议避免了已有RFID认证协议存在的安全隐患。安全分析表明新协议具有较强的安全和隐私属性,并且能够抵抗各种可能的恶意攻击。根据低代价RFID标签资源受限的需求,新协议仅需要在标签上执行两种简单的比特位操作,与其他超轻量级RFID认证协议相比具有更好的性能优势。  相似文献   

10.
一种基于逆hash链的RFID安全协议   总被引:3,自引:0,他引:3  
为解决低成本无线射频识别RFID标签和标签读写器之间通信的安全性问题,提出了一种基于逆hash链的RFID安全协议,并对其性能和安全性能进行了分析,说明该安全协议仅需要很少的计算资源和电力供应,并具有较高的安全性.  相似文献   

11.
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.  相似文献   

12.
European Community policy and the market   总被引:1,自引:0,他引:1  
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.  相似文献   

13.
融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。  相似文献   

14.
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.  相似文献   

15.
This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.  相似文献   

16.
Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008  相似文献   

17.
《计算机科学》2007,34(4):148-148
Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.  相似文献   

18.
Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.  相似文献   

19.
为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.  相似文献   

20.
This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)SM and Team Software Process (TSP){SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.  相似文献   

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