iPhoto "passworded folder" mechanism In iPhoto, I have all pictures I've ever taken, or opened from my email.

It includes, for example, pictures of my gf showing me the underwear she is hesitating to buy, or anything else I might not be willing to show while streaming through the pics with a few friends.

Is there any way I could, without entirely deleting these pictures, turn some security on, as if they were in a passworded folder?

It seems some privacy/security feature must be available in such a massively used software, but I can't find it...
One option would be to have multiple iPhoto libraries, and keep one on an encrypted Disk Image.


Create an encrypted disk image in Disk Utility, or some other utility. This might be a good use for Knox, which lets you easily create an encrypted disk image and unlock it and mount it when you want.
When you open iPhoto, hold down the ⌥ (Option) key and you will be asked to select which iPhoto library you want to open.