US Patent 12093375 Generating and monitoring fictitious data entries to detect breaches

Provided is a process that includes: obtaining a fictitious data entry associated with a field present in a plurality of records associated with an online resource; sending a query to a monitoring application, the query specifying the fictitious data entry and a request to determine whether a second repository of compromised data includes the fictitious data entry; in response to the query, receiving query results indicating that the second repository of compromised data includes the fictitious data entry; in response to the received indication that the second repository of compromised data includes the fictitious data entry, identifying at least some of the first set of one or more repositories that store the data entry; designating other data entries within the at least some of the first set of one or more repositories as potentially having been breached; and storing the designation in memory.