Wireless Security.pdf - PDF Archive

RFID Security 619
Figure 24.2 : RFID reader including the antenna and electronics package
low enough so that smaller RFID units are attainable to hobbyists. Figure 24.2 is a photo
of an RFID reader.
NOTES FROM THE UNDERGROUND …
Identification Friend or Foe (IFF)
The concept of automatic identification using a radio transponder originated in
World War II as a way to distinguish friendly aircraft from the enemy; hence, the
name Identification Friend or Foe (IFF). The “ friendly ” planes responded with the
correct identification, while those that did not respond were considered “ foes. ”
In principle, IFF operates much the same as RFID. A coded interrogation signal
is sent out on a particular RF, which the transponder receives and decodes.
The transponder then replies with encrypted identification information. Each
transponder has a unique identifier; however, some secondary information can be
manually set by the pilot.
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