WASHINGTON ( CNN ) -- `` Cybersecurity is one of our most urgent priorities , '' says DHS chief Janet Napolitano . The Department of Homeland Security has been working with the private sector to develop a plan for cybersecurity. Napolitano says computer networks too crucial to be left vulnerable to attack .
`` Cybersecurity is one of our most urgent priorities , '' says DHS chief Janet Napolitano . The Department of Homeland Security has been working with the private sector to develop a plan for cybersecurity. Napolitano says computer networks too crucial to be left vulnerable to attack .