Sony insurer sues to deny data breach coverage

One of Sony Corp’s insurers has asked a court to declare that it does not have to pay to defend the media and electronics conglomerate from mounting legal claims related to a massive data breach earlier this year. The dispute comes as demand soars for "cyberinsurance," with companies seeking to protect themselves against customer claims and associated costs for data and identity theft. How to write such policies has become a huge subject of debate in the insurance industry.