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dedicated short-range communication systems (RFID (application…
dedicated short-range communication systems
RFID
tags
readers
difference 8
application
limitation
electronic article surveillance system
tags or labels
type
interference and health issues
impetus
passive RFID tags
dis3
ad2
active RFID tags
dis
ad2
eg
RFID technical issues
signal synchronisation
multiple tags
manchester encoding
ad3
query tree protocol
suitable for dumb tag(no memory required on the tag)
reader transmit most of the tag address which reduces security because the reader has a powerful transmitter which can be detected hundreds of meters away
ALOHA protocol
privacy concern
cause
read the tag from a distance even when not in direct view of the reader
exposure of private information
unauthorised tracking
barcode