Investigators believe that overseas hackers were responsible for the cyber attack on U.S. retailer Target Corp that compromised up to 40 million payment cards during the first three weeks of the holiday shopping season, a person familiar with the matter said. The person, who was not authorized to talk publicly about the matter, declined to say how the hackers got in or where investigators believe they are based, saying investigators don't want to show their hand to the criminals.
- Read the article: Reuters
