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Is there a Rose bush that can be planted within a grown hedge to help with security (thorns) thanks

Yes but many of the "good ones" that I know are usually climbers. Here is a list that you can go through as soon as your gloves are on : Mermaid, New Dawn, a lot of rugosa roses (these are shrub like), Night Light (brrrr, sends chills thinking about all the thorns... not too long just a bunch of them), Alba Odorata, Sombreuil, John Cabot and let us not forget Fourth of July (this one is scary; a slow starter on years 1 and 2). That should get the ball rolling so others can add more names. Get ready to buy multiple gloves after reading this thread! Hee hee hee!