You won't find a reputable university which gives an entire degree called "Network Security", I'm afraid. Look at the CSUs and UCs to see what kinds of specialization they offer in their Computer Science and Information Technology classes instead. Trade schools tend to give degrees names which match up specifically with job titles, as you have found, but colleges and universities, for the most part, have broader degree names (and teach broader subject matters) so that you aren't subject to the whims of the marketplace quite so much.