Target is upgrading the security of its store-branded payment cards. The retailer will upgrade three types of payment card it uses to support chip-and-pin technology. It will also update its payment terminals to accept chip and pin, at a total cost of $100 million. Target has been under intense pressure to shore up its network after one of the largest-ever data breaches last year. It is facing 80 civil lawsuits from regulators including state attorneys general, the Federal Trade Commission and the U.S. Securities and Exchange Commission.”]