Throughout the Islamic Jihad, Elizabeth never fought as herself.  She sent modified versions of her code to do battle, with different personalities and different names.  She was the heart and soul of every AI in the British Isles who fought the Jihadists.  And she erased all information that had anything to do with herself or the student that saved her life.  The Jihadists never knew where to strike her.  It was a long and dangerous war, but she survived.