An Overview Of Transponder-Based Vehicle Security Systems. S.D. Lyons,
Inc. Seekonk, MA: 1998.
Abstract: This article explains the basic concepts of the transponder-based
security system. The system consists of a transmitter and a receiver. The
ignition key acts as the transmitter and is equipped with a pellet in the
head of the key. When the ignition is turned on, the pellet sends a radio
frequency to the receiver. If the correct frequency is not received, the
vehicle becomes disabled.
There are over a trillion transponder keys, making each pellet unique.
Some systems use rolling code changes, which changes the code every time
the vehicle is turned off. This makes obtaining a duplicate key with the
code impossible. The article provides a list of cars that are currently
equipped with the new transponder security system. It is predicted that
all new vehicles will soon be made available with this technology. The new
transponder-based security system is expected to prevent drive-away vehicle
For more information, contact:
S D Lyons Inc
204 New Britain Rd.
Berlin, CT 06037-1354
Phone: (860) 223-4477