So you have a gallery for a client, and you are using WordPress. There are several ways to do this in WordPress. I’d like to outline one simple way for you to do this
It works for simple text, but images may make things a little more complicated. Create a post in draft, add a gallery/images to the post and hit ‘save’. You don’t need to publish the post. Then check the left admin bar, and click on Drafts for Friends. Of course, the images might still be in the Media Gallery so savvy hackers will know where to look, if the htaccess file isn’t set properly or the sitemap includes images.
However, I can think of other uses such as time limited offers, temp download links, etc…!