RFID is an area of automatic identifi cation that is gaining

momentum and is considered by some to emerge as one of

the most pervasive computing technologies in history. In its

simplest form, RFID is a similar concept to bar coding. It is

seen as a means of enhancing data processes and is comple-

mentary to existing technologies. It is a proven technology

that has been in use since the 1970s.-Amore complex descr iption is an electromagnetic proxim-

ity identifi cation and data transaction system. Using ‘‘RFID

tags’’ on objects or assets, and ‘‘readers’’ to gather the tag in-

formation, RFID represents an improvement over bar codes in

terms of non-optical proximity communication, information

density, and two-way communication ability. Operational

RFID systems involve tags and readers interactingwith objects

[assets] and database systems to provide an information and/

or operational function.

RFID is used for a wide variety of applications ranging from

the familiar building access control proximity cards to supply

chain tracking, toll collection, vehicle parking access control,

retail stock management, ski lift access, tracking library

books, theft prevention, vehicle immobiliser systems and rail-

way rolling stock identifi cation and movement tracking.