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Rfid Auditor

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Copyright © 2005 Information Systems Audit and Control Association. All rights reserved. www.isaca.org.

Radio Frequency Identification: What Does It Mean for Auditors?
By Beth Serepca, CFP OIG, NRC, and Bob Moody, CISA, CIA, CFE, DOI , adio frequency identification (RFID) is a method of remotely storing and retrieving data using devices called RFID tags. RFID is a wireless technology that includes passive, semipassive and active tags: • Active RFID systems can store large amounts of information using a power source within the tags. • Passive RFID tags do not use a separate external power source. They obtain operating power from the tag reader. • Semipassive RFID uses an internal power source to monitor environmental conditions, but requires radio frequency energy transferred from the reader to power a tag response (similar to passive tags). The tags are small objects that can be attached to or incorporated into a product, much like the standard bar code tags on products in the supermarket. The difference is that while it takes a laser to scan a standard bar code and read its universal product code, an RFID tag stores its identifying code on a tiny microchip and transmits it wirelessly to a reader device. This allows more tags to be scanned at once from farther away, and it allows individual items—not just types of items—to be assigned unique identifying codes. An RFID system may consist of several components: tags, tag readers, tag programming stations, circulation readers, sorting equipment and tag inventory wands. The purpose of a system is to enable data to be transmitted by a portable device called a tag, which is read by an RFID reader and processed according to the needs of a particular application. The data transmitted may provide identification or location information, or specifics about the product tagged, such as price, color and date of purchase. RFID

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