Radio Frequency Identification

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1. Introduction 1.1. What is RFID? Radio Frequency Identification (RFID) is a technology for automated identification of objects and people. RFID systems have been gaining more popularity in areas especially in supply chain management and automated identification systems. However, there are many existing and potential problems in the RFID systems which could threat the technology’s future. To successfully adopt RFID technology in various applications, we need to develop the solutions to protect the RFID system’s data information. This study investigates important issues related to privacy and security of RFID based on the recent literature and suggests solutions to cope with the problem. The RFID devices serves the same purpose as a bar…show more content…
Any scanner can read any barcode. • Cannot be read when dirty or heavily scratched. • Scanner can read only one barcode at a time. • Cannot reprogram the contents of a barcode. 1.4 Common RFID Problems Some common problems with RFID are reader accidents and tag accidents. Reader accidents occurs when the signals from two or more readers are similar. The tag is unable to respond to immediate queries. Systems must be carefully set up to avoid this problem. Tag collision occurs when many tags are present in a small area; but since the read time is very fast, it is easier for vendors to develop systems that ensure that tags respond one at a time. 2. How RFID Works How does RFID work? A Radio-Frequency Identification system has three parts: • A scanning antenna • A transceiver with a decoder to interpret the data • A transponder - the RFID tag - that has been programmed with information. The scanning antenna puts out radio-frequency signals in a relatively short range. The RF radiation does two…show more content…
6.1. The major advantages of an active RFID tag are: • It can be read at distances of one hundred feet or more, greatly improving the utility of the device • It may have other sensors that can use electricity for power. 6.2. The problems and disadvantages of an active RFID tag are: • The tag cannot function without battery power, which limits the lifetime of the tag. • The tag is typically more expensive • The tag is physically larger, which may limit applications. • The long-term maintenance costs for an active RFID tag can be greater than those of a passive tag if the batteries are replaced. • Battery outages in an active tag can result in expensive misreads. 6.3. Active RFID tags may have all or some of the following features: • Longest communication range of any tag • The capability to perform independent monitoring and control • The capability of initiating communications • The capability of performing diagnostics • The highest data bandwidth • Active RFID tags may even be equipped with autonomous networking; the tags autonomously determine the best communication

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