Z+ category is a security detail of 55 personnel, including 10+ NSG commandos and police personnel. - Z+ is the highest category security in India. What is Z+ security? The second highest level of security provided in India, with 55 personnel that includes 10 NSG Commandos and police. The Indian Special Protection Group is "an armed force of the Union for providing proximate. What is Z Plus Security in Hindi | By Ishan.