Enhancing the security posture of GC systems and networks requires a comprehensive IT security strategy that includes defining requirements, developing IT security architectures, and designing patterns that can be used to implement defence-in-depth IT security capabilities. The GC established the ESA program for to address these areas. | Enhancing the security posture of GC systems and networks requires a comprehensive IT security strategy that includes defining requirements, developing IT security architectures, and designing patterns that can be used to implement defence-in-depth IT security capabilities. The GC established the ESA program for to address these areas. |