I think you have other problems than the security light. You have wiring or data wire connection issues. The security light will illuminate for weird reasons. On the way back from getting my Goblin inspected for renewal, the converter check happened and failed which illuminated the check engine light (as it should) as well as the security light. Upon getting home, cycled the car off then back on, and the security light went out but the check engine light remained (as it should). Fix the other issue because I think that is holding the car back and not the key. Could also be loose sensor at the ignition switch.
Joe