Abstract: A data mapping (DM) computing device including a processor and a memory in communication with the processor is provided. The processor receives a plurality of validated data messages associated with a plurality of transactions through a first communication channel and receives a non-validated data message associated with a first transaction through a second communication channel. Each validated data message includes a plurality of validated data elements with a validated merchant identifier. The non-validated data message includes a plurality of non-validated data elements with a non-validated merchant identifier.

Abstract: A computing node comprises a processor and a transaction cache. The transaction cache comprises one or more function records for each of a plurality of account numbers. Each function record comprises an account number, a function identifier, and transaction identifiers for any qualifying transactions. A qualifying transaction is a transaction for that account number to be used in determining a value for a function identified by the function identifier. The computing node can receive notification of an authorization request for a transaction pending authorization from a transaction network and provide values for each of the functions associated with an account number from the function record for that function using the transaction identifiers in that function record. If the transaction pending authorization is authorized, the computing node can then add a transaction identifier for that transaction to each function record for which that transaction is a qualifying transaction.

Abstract: A computing node comprises a processor and a transaction cache. The transaction cache comprises transaction data records for a plurality of account numbers. Each transaction data record comprises a plurality of transaction data elements for a transaction including the account number for that transaction. The computing node is adapted to receive an authorization request for a transaction pending authorization from a transaction network, use the transaction data records in the transaction cache to calculate function values for one or more predetermined functions for the account number associated with the transaction pending authorization, wherein the function values are determined from the transaction data elements of the transaction data records for that account number, and provide the calculated function values to the transaction network. If the transaction pending authorization is authorized, the computing node adds a transaction data record for that transaction to the transaction cache.

Abstract: A computer implemented method of assessing the probability of fraudulent activity in an account to account payment is provided. The method comprises determining, based on previous credit balance settlement transactions between a first account and a card settlement account, that a first set of payment credentials is associated with the first account. It is determined that a second set of payment credentials are associated with the merchant account. A database comprising historical data indicating details of past payment transactions between the holder of the first set of payment credentials to the holder of the second set of payment credentials is accessed. A fraud probability engine is used to generate, based on the historical data, a fraud probability value for a transaction from a first account to a second account, wherein the fraud probability value is an estimate of the probability of the transaction being fraudulent.

Abstract: A data mapping (DM) computing device including a processor and a memory in communication with the processor is provided. The processor receives a plurality of validated data messages associated with a plurality of transactions through a first communication channel and receives a non-validated data message associated with a first transaction through a second communication channel. Each validated data message includes a plurality of validated data elements with a validated merchant identifier. The non-validated data message includes a plurality of non-validated data elements with a non-validated merchant identifier.