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摘要： An ultra-thin double-functional metasurface patch antenna (MPA) was proposed, where it can operate not only in the antenna mode but also can simultaneously act as perfect absorber for normal incident waves, suitable for RFID applications in the 868 MHz band. The MPA structure consists of a typical coaxially-fed patch antenna merged, for the first time, with a metasurface absorber acting as artificial ground. A methodology for the unit-cell design of the metasurface is proposed followed by an equivalent circuit model analysis, which makes it possible to transform a low-loss (tan delta = 0.0015) unit-cell with highly-reflective characteristics to a perfect absorber for normal incident waves. It is based on modifying the critical external coupling by properly introducing slits on the unit-cell, allowing to design an ultra-thin (lambda(0)/225 at 868 MHz) and a very compact structure in comparison to previously developed designs. For validation purposes, the MPA was fabricated and its performances in both functional modes were characterized numerically and experimentally. It is demonstrated that merging the absorber with the patch not only allows obtaining a well-matched (vertical bar S-11 vertical bar < - 30 dB) antenna with an enhanced gain (by 175.6% compared to a typical patch) at the desired frequency but also leads to an overall thickness of only 2.5 mm (lambda(0)/138.1 at 868 MHz). With an absorber size limited to the MPA dimensions, a reasonable 1.3 dB reduction in powers reflected by the MPA was achieved compared to a similar size metallic sheet. Whilst having the lowest profile among the so far reported RFID readers, the proposed MPA can be conveniently fitted for example within the required volume of smart shelf RFID readers or used in portable RFID readers while being capable of mitigating multipath reflection issues and incorrect reading of RFID.

关键词： Radio frequency identification (RFID)  

摘要： The implementation of efficient security mechanisms for Radio Frequency Identification (RFID) system has always been a continuous challenge due to its limited computing resources. Previously,hash-based, symmetric-key cryptography-based and elliptic curve cryptography based security protocols were proposed for RFID system. However, these protocols are not suitable because some of them failed to fulfil the RFID security requirements, and some of them produce high computational overhead. Recently researchers have focused on developing an efficient security mechanism based on hyperelliptic curve cryptography (HECC) which provides high security with 80 bits lower-key size. In this paper, we propose an efficient RFID authentication scheme based on hyperelliptic curve Signcryption. The proposed authentication scheme provides the required security features for the RFID system as well as security from potential attacks. We validated our proposed scheme’s security by utilizing a widely used simulation tool, Automated Validation of Internet Security Protocols and Applications (AVISPA). Furthermore, the results reveal that the computational, communication and storage overheads of the proposed scheme is much less than the other recently proposed schemes. Compared to the most recently published work based on ECC Signcryption, our scheme is 70% efficient in terms of computational overhead, 42.7% efficient in terms of communication overhead, and 50% efficient in terms of storage overhead. Therefore, the proposed scheme is more efficient as compared to the recently published work in this domain. Hence, it is an attractive solution for resource-limited devices like RFID tags. © 2021, CC BY.

关键词： RFID   UMAP   Ultralightweight   Permutation  

摘要： Confidentiality and authentication are primary concerns of RFID (Radio Frequency IDentification) based identification systems. Low cost, non sight-line scanning capability, unique identification and functional haste make RFID systems much more suitable for supply chain management and IoT networks, compare to barcodes and magnetic tapes. Since, RFID tags can be scanned from a greater distance over a radio channel which is easily accessible for adversaries, therefore numerous Ultralightweight Mutual Authentication Protocols (UMAPs) have been proposed to ensure the security of the RFID systems in a cost effective way. These UMAPs mainly involve low cost bitwise logical (Triangular) operations such as XOR, ANDOR etc., usually these logical operations offer poor diffusion properties and hence result in disclosure of the concealed secrets. Almost all of the previous UMAPs have certain pitfalls and reported to be susceptible to Denial of Service, traceability, full disclosure and cloning attacks. In this paper, we propose a new UMAP that is resilient to structured and unstructured cryptanalysis techniques. The proposed Ultralightweight Resilient Mutual Authentication Protocol (URMAP) avoids all the pitfalls and unbalanced operators in its design that were the main reasons of failure of previous UMAPs. The incorporation of ultralightweight primitives;Per-XOR (P-x) and InversePer-XOR (P-x(-1)) makes the protocol messages more resistant to all types of adversaries. The security and privacy capabilities of URMAP are evaluated through formal analysis. The results of GNY Logic analysis prove that the proposed protocol is resilient to all possible attack scenarios thus ensuring optimal confidentiality, integrity and availability services.

关键词： ZigBee技术   RFID技术   储物柜   共享  

摘要： 基于ZigBee技术并结合RFID技术,采用CC2530通讯芯片、STM32F103ZET6主控制芯片、MFRC522读卡芯片、LCD12864液晶屏、AT42QT2160触摸按键,各小柜模块构成储物柜的硬件系统。Zig Bee协调器节点、无线采集终端节点、无线控制终端节点、上位机设计为软件系统,实现存取物品功能,显示功能,状态检测和维护调控功能,视频监控功能,存储、处理、监测、查询功能,APP提示功能。

关键词： 图书编目   自动查重   局域网搭建   信息存储   系统测试   系统设计  

摘要： 为了解决传统图书编目查重系统中存在的查重时间长、查重精度低的问题,利用RFID技术,分别从硬件设备、数据库以及软件功能三个方面,实现对自动查重系统的优化设计。其中,硬件系统在传统硬件设备的基础上,加设RFID读写标签设备,并在图书管理环境下搭建无线局域网络,保证图书编目数据的实时采集与传输。在系统数据库中,按照固定的格式和规则将现有的图书编目及其特征向量信息存储其中,作为自动查重的对比标准。通过确定图书编目查重的工作内容、RFID标识的加工处理和检测图书编目相似度等步骤,得出图书编目自动查重结果,并通过人工交互界面输出。通过系统测试实验得出结论:设计的自动查重系统比传统系统的查重精度更高,且查重速度约提高8 s。

关键词： 物联网   zigbee   云平台   RFID   esp8266  

摘要： 由于我国社会经济目前快速提高,汽车保有量日益增加,停车难的问题日益凸显出来。研究中提出一种基于互联网云端与智能硬件相结合的车位管理系统。系统功能包括导航,预定车位,移动支付。设计中系统硬件层面使用zigbee开发板、红外传感器、RFID卡及读卡器组成;软件层面使用Java言设计APP。使用Esp8266连接云平台做中间处理,形成一个物联网的即时数据输循环,增加用户使用的便利性,对于构建新型智能化停车位管理系统提供了有益的助力,极大地方便了用户的体验。

关键词： RFID   电网设备   管理系统   硬件设计   软件设计  

摘要： 为了提高电网设备管理系统在实际应用过程中的时效性,基于RFID技术提出一种电网设备管理系统设计方法,硬件包括读写装置及天线、电子标签。在硬件的支撑下,定义电网设备标签,实现电网设备二次布局规划管理。设计对比实验,通过与传统管理系统在实际应用过程中的效果对比可知,提出的系统在实际应用中具有很高的时效性,各项功能明显优于传统管理系统。

关键词： 新能源业务   人机交互技术   RFID技术   日志管理  

摘要： 在新能源业务发展中,得益于政府部门的大力支持,各项新能源业务在不同区域有效开展。本文主要介绍了一种新能源业务自助受理终端,对于该产品的应用价值进行简要阐述,提出了四点关键技术与创新研究,对于该设备整体实现做出分析。

关键词： Enabling technologies   IoT   RFID   Sensors   ZigBee  

摘要： Internet of Things is transforming real devices to smart intelligent virtual devices. In IoT day today devices of daily use are manufactured along with sensors which are capable for identification and sensing. They can be networked, are capable to process, can interact with other devices through Internet. IoT objective is to connect almost everything under a common infrastructure. This helps to control devices and will keep us informed about the status of devices. The paper aims to give Internet of Things overview, architectures, enabling technologies and their applications. It presents latest trends, current state, recent developments, challenges, security, privacy, applications of IoT and future research directions.

关键词： 区块链技术   RFID技术   智慧物流   溯源系统  

摘要： 介绍区块链相关知识,阐述国内外智慧物流与区块链的结合现状,分析区块链和RFID技术的主要特点及优势。探讨目前智慧物流及其溯源系统存在的问题,以精品杂粮为例,应用区块链的特性与去中心化思想构建溯源系统架构、颠覆原有信任模式,同时应用RFID技术为系统下层结构提供技术支持并优化了物联网层框架,提高系统智能化与自动化水平,最终实现精品杂粮溯源系统全链路追溯。