Is security through obscurity a security measure

It is not a security measure, per se. Security by obscurity is where you rely upon some fact which you think is not known to an attacker. The problem with this type of "security" is that, once the fact is disclosed, the security scheme is rendered entirely useless.

Relying on just SBO is useless, agreed. I think using it in addition so solid security reduces the attack surface which aids reduced attempts and ups the level of difficulty required to complete a successful attack.

http://www.thefreedictionary.com/security+measures

"a precautionary measure warding off impending danger or damage or injury etc."

It is not security in its own right, but it can add to other security measures. Think camouflage.

Thanks, agreed, I just responded to another guy and used that term before I saw your comment. :-)

No, it is a derogatory term.

Which is better then, making your systems an obvious target or making them a harder to identify target?

Which is better, leaving your front door open or leaving your back door open?

It is better to spend your time finding and fixing problems than to fool yourself into thinking that trying to hide them will make some kind of difference.

My theory is lock the front and the back and camouflage the house.