For the second time in the past nine months, Google has inadvertently but nonetheless correctly helped to identify the source of a large credit card breach — by assigning a “This site may be hacked” warning beneath the search results for the Web site of a victimized merchant. A lit...

For the second time in the past nine months, Google has inadvertently but nonetheless correctly helped to identify the source of a large credit card breach — by assigning a “This site may be hacked” warning beneath the search results for the Web site of a victimized merchant. A lit...