PROSPER MARKETPLACE, INC

Prosper's breach was the database answering as designed: someone inside its systems queried the tables holding customer and applicant records and left with Social Security numbers, bank accounts, passports, and tax files on 17.6 million people. Network access was treated as permission to read the one warehouse where a lender keeps its most sensitive identity data, and months of quiet queries passed as ordinary traffic. No group has claimed the theft, leaving the adversary unnamed and the harvest complete.