Seiko Precision, Inc. is going to introduce "hybrid RFID tags" (SecureTag WT-300). It’s based on the idea of combining an active RFID tag and a passive RFID tag in a single package (and thereby providing dual communication ranges).
The active-tag component provides the communication range of about 50cm, and can be used to track people’s whereabouts in large spaces. The passive-tag component provides a shorter communication range, however, its identification/authentication mechanism is more secure.
It may sound similar to NICT‘s hybrid radio frequency identification system, which they presented at Mobile Response 2007?Workshop last year.


