If the "SECURITY" lamp flashes while you are attempting to start the engine, the PASSKey system is not recognizing the ignition key resistance. that could be due to failed contacts in the ignition lock cylinder, broken wires, or as little as contamination on the key or in the lock cylinder (NEVER use liquid lubricants in lock cylinders).
Try cleaning the ignition key resistor pellet with alcohol and a cotton swab. Do the same thing to the lock cylinder contacts by carefully inserting a swab soaked in alcohol into the lock cylinder in the same location the resistor pellet would enter it. Allow the alcohol to dry, then insert the key and turn the ignition on, but do not start the engine. Watch the SECURITY lamp when you turn the ignition on. It should illuminate for about four-five seconds, then turn off. If not, you may have other problems with the system.
Short of digging into the wiring, there is no easy way to jumper the system to bypass it. It wouldn't be much of a theft deterrent if there were.