NYT Attack Highlights Weaknesses with Registrars

A hacking attack on websites run by New York Times Co., Twitter Inc. and other companies highlights a longstanding soft spot in Internet security: The Web's version of a phone directory is controlled by outside companies. Although large firms often spend millions to combat a growing list of cyberthreats, the keys to their Web addresses -- the names that usually end in .com -- often are held by one of hundreds of so-called domain-name server registration companies.