Résumé
The paper presents the design and development of a low cost chipless RFID system for secure near field data transfer. This system is ideal for use in credit cards and similar identification cards which are based on "data transfer by contact" which at present uses the conventional using integrated circuits (IC) or magnetic strips. The system consists of the design of a compatible low cost tag as well as the measurement set up using a metallic cavity. Using the presented technique it is easily possible to code 23 bits within the dimensions of a conventional credit card. Emphasis is given to security as well as larger data capability. It can be seen that the presented technique is robust and cost effective compared to the existing techniques and can be used as a viable alternative in identification cards based on data transfer by contact.