Enrique Salem, president and chief executive officer of Symantec Corp., stands for a portrait in New York, U.S., on Thursday, May 27, 2010. Symantec Corp., the largest maker of security software, agreed to buy VeriSign Inc.'s authentication- services unit this month for $1.28 billion in cash, gaining a business that certifies that websites are safe. Photographer: Daniel Acker/Bloomberg via Getty Images