Howdy,
When it comes to strong native fencing it hard to beat the Osage Orange [aka Bois D’Arc, Horse-apple, or (Latin) Maclura pomifera]. It was used as cattle fencing in its native east Texas and Oklahoma long before the devil wire was invented. It grows quickly, forms a dense hedge, and has long thorns that no one will try to force through. Its wood is hard and it burns for a long time so it can be harvested for fuel too.
For protecting windows I use the beautiful Knockout Rose. I love its flowers but I hate it when its time to trim it back. Its hard sharp thorns cover every inch of its stems. Trying to climb over it to get into the window will be an exercise in pain. – Ken O.