I'm coming in late to this conversation, but here's a shot of how my front door locks:
Eventually, I will install a deadbolt like this:
This type of deadbolt will allow me to open the door with a key set at the "normal" height from the outside, and a simple knob from the inside. And since the bolts "grab" the lock vertically, no one can force the door open by pushing.
That's the plan at least. I'll let you know if it actually works on the front door.