Fortifications are militaryconstructions designed for defensivewarfare. They have been used for many thousands of years, in a variety of increasingly complex designs. The practice of improving an area's defense is also known as "fortification". Many military installations are known as forts, although they are not always "fortified".
... use of some DRM schemes to restrict the ability to copy and distribute documents can be used by the criminal as a means of preventing enforcement of laws against fraud ...