I was never in the State Department, but I imagine their communications security equipment was the same as was in use in the military.
Hillary Clinton is trying to portray herself as being ignorant of the need to use communications security equipment.
If she used a secure (automatically scrambles or encodes) telephone, even once, while serving as Secretary of State, then her argument that she was ignorant of the need to use communications security equipment goes right out the window.
Once. Just let her use one even once. Even somebody seeing her use one.
I read that she actually took a BlackBerry into the hall in order to make a call because it wasn’t secure and The State Department wouldn’t let her use it in her office.