Systems and related methods facilitating payments with a mobile device are discussed herein. Circuitry in a networked-based payment system may be configured to receive payment information from a first device. The first device may include circuitry configured to wirelessly receive wallet identifying data from the payment system. The wallet identifying data may be used to secure messages between the first device and another device over a wireless link. For example, the first device may be configured to send the wallet identifying data to a second device, which may then communicate with the payment system. In response, consumer identifying data associated with the wallet identifying data may be received by the second device from the payment system. In some embodiments, use of wallet identifying data may be applied to other communications, such as for messages that authorize payment.