The exterior of Tartarus consists of ten foot thick titanium steel lined with an automated defense network and powerful kinetic shields. Sensors on the hull can located and lock-on to an incoming ship or projectile from a quarter-mile away. Adding to that is a small fleet of cruisers and frigates which constantly surround the station in case of emergency.
The real defense of Tartarus is on the inside of the station. Thousands of security cameras and sensor strips are located throughout the station in nearly every corridor. More than 600 highly-trained armed guards patrol and monitor the station and it's inmates constantly. Automated turrets which can alternate between stun and deadly are located on various walls and ceilings. A lock-down safety gate is located in every corridor and room of Tartarus, which are sealed in case of emergency. Because of it's high defenses, Tartarus is thought to be inescapable.