Abstract: A security system for point of sale (POS) terminals, including one or more POS processors for injecting decoy credit cards numbers into memories of corresponding one or more POS terminals, a secure database including entries of the decoy credit card numbers and, for each entry, a corresponding identifier of a specific POS terminal and a corresponding date & time, and a security manager receiving a notification of attempted use of a specific decoy credit card number, extracting the POS identifier and the date & time corresponding to the specific decoy credit card number from the database, identifying legitimate credit card numbers that were processed by the identified POS terminal during a time period including the date & time corresponding to the specific decoy credit card number, and alerting an authority that the legitimate credit card numbers may have been compromised.

Abstract: A security system for point of sale (POS) terminals, including one or more POS processors for injecting decoy credit cards numbers into memories of corresponding one or more POS terminals, a secure database including entries of the decoy credit card numbers and, for each entry, a corresponding identifier of a specific POS terminal and a corresponding date & time, and a security manager receiving a notification of attempted use of a specific decoy credit card number, extracting the POS identifier and the date & time corresponding to the specific decoy credit card number from the database, identifying legitimate credit card numbers that were processed by the identified POS terminal during a time period including the date & time corresponding to the specific decoy credit card number, and alerting an authority that the legitimate credit card numbers may have been compromised.