US Patent 8433657 Secure and mobile financial transaction

A portable device is configured to transmit a first encrypted message to an account database server. The first encrypted message may comprise a request to get information about a financial account. The portable device receives a second encrypted message comprising the financial account information. The portable device wirelessly receives a signal from a merchant machine and wirelessly transmits a response message to the merchant machine. The response message comprises account related information for the merchant machine to trigger a financial transaction.