Might be time for 2-step authentication if not in place already
                                
                                
                                    (Newser) -
                                    Yahoo  broke the news  to half-a-billion users Thursday that hackers breached its system and thus might know their passwords, security questions, phone numbers, and dates of birth. Yes, that's a "b" as in billion, making this the largest data breach ever, notes  CNET . The company is blaming "...