Buy a CISA certificate. How long to get a CISA certificate online. Buy a fake diploma online. The Cybersecurity and Infrastructure Security Agency (CISA), a component of the U.S. Department of Homeland Security (DHS), is responsible for cybersecurity and infrastructure protection at all levels of government, coordinates U.S. state cybersecurity programs, and improves government cybersecurity protections against private and state hackers. Cybersecurity is now seen as a vital component for individuals and families, as well as organizations, governments, educational institutions, and our businesses. It is critical for families and parents to protect children and family members from online fraud. The term cyberattack covers a wide variety of actions, from simple probing to defacement of websites, to denial of service, to espionage and sabotage.