PhD in Counter-terrorism and Security Studies

What are the requirements and prerequisites to participate in the PhD in Counter-terrorism and Security Studies? Is it possible to get scholarship to be part of this program? I currently work with the Humanitarian organisation in Nigeria ( Nigerian Red Cross National Headquarters Abuja, to be specific) as the Director Safer Access, Weapon Contamination, Health Care in Danger (HCiD) and Security. I have master degree in Disaster Management from the University of Lagos, Western Nigeria.