When Undercover Credit Card Buys Go Bad
I propose that a few fake credit card numbers and names be issued to different companies and that they place them in their records. If there is a breach, finding those fakes will identify where the breach came from. Each set of fakes would only be given to a specific company.This is similar to how dictionaries (before the internet) would post fake entries to discover if competitors were copying them. Or how (some claim) map makers would plant fake places to identify similar copying. In the credit card case though, it wouldn't harm innocent users who may mistakenly think the fake is real.