Won't start and 'security' lite blinks

Occasionally my Alero does not start and the security light blinks. I know about the 10 minute wait until the light goes out. I have been told that it needs a new ignition because the single key I have is worn. The problem is I don't want to spend 400 plus on a car with 220k on it. My question is: Is there anything I can do or have done that would take the 'security' thing out of the equation?
I spoke to a fellow that did something to his Cavalier involving a couple of wires in the ignition that solved the problem but his security light nows stays on. I would not care about that as long is it would start.
Thanks in advance.