Mine is in a high-rise garage. No cameras or security, and you could ride the bike around the gates, so I use a brake lock (on handle bars on front brake). It is not unbreakable but it is bright red (deterrent), clips on easy to the seat saddle handle (i.e. easy to store on bike), and I hope makes it an annoying option compared to other bikes in garage. My strategy - I don't need to be the most secure....just more than the other bike. Plus, a $2k 1970's bike isn't top of list to steal. So theft deterrent built in.
