Two banks that claim to have suffered losses from the recent data breach at Target have sued Trustwave Holdings Inc., the company that was responsible for validating Target’s compliance with the Payment Card Industry Data Security Standard. In a lawsuit filed in federal court in Chicago, Trustmark National Bank and Green Bank N.A, sued both Target and Trustwave for not doing enough to protect customer payment card data. The lawsuit, which seeks class action status, accused both companies of negligence, deceptive practices, negligent misrepresentation and other misdeeds. The suit seeks compensatory and statutory damages for what the banks claimed were the losses they sustained in canceling and reissuing credit and debit cards that were exposed in the Target data breach. A Trustwave spokesman declined comment on the lawsuit.