Patent ID: 8606638

Claim:
A method for requesting the completion of a payment transaction by a mobile device, the method comprising: receiving, from a point of sale device by a mobile device utilizing at least one microphone, within a predetermined distance from the point of sale device, one or more tones output by the point of sale device and comprising embedded information associated with a proposed transaction; extracting, by the mobile device, the received information from the one or more tones; transmitting, by the mobile device to a third-party processor, a first request for a risk analysis for the proposed transaction based at least in part on the extracted information; receiving, by the mobile device from the third-party processor, the risk analysis in response to the request; generating, by the mobile device utilizing at least a portion of the received information and an identifier associated with the mobile device, a second request comprising the risk analysis to approve the proposed transaction; and communicating, from the mobile device to a transaction processor, the generated second request, wherein the transaction processor determines based at least in part on the risk analysis whether to approve the proposed transaction and communicates an approval or decline message to the point of sale device, and wherein account information associated with a user of the mobile device is not provided to the point of sale device or a merchant associated with the point of sale device.