keywords: resigns resigned cybersecurity symantec executive
text: Cybersecurity Chief Abruptly Resigns By TED BRIDIS    WASHINGTON (AP) -- The government's cybersecurity chief has abruptly resigned after one year with the Department of Homeland Security, confiding to industry colleagues his frustration over what he considers a lack of attention paid to computer security issues within the agency.    Amit Yoran, a former software executive from Symantec Corp...