Yahoo Inc.’s revelation of a massive 2014 security breach might have reminded you of an old account or two you haven’t logged into for years. No good comes from leaving details of your identity—alternate email addresses, date of birth and, yes, passwords—floating around the backwaters of the internet. Hackers who find their way into one account, dormant or still in use, can exploit details such as PINs or security-question answers...

Source: Wall Street Journal September 23, 2016 20:15 UTC