A system for processing payment data includes a payer terminal, a recipient terminal, and a payment server. The payer terminal is adapted to return, to the recipient terminal, encrypted payment request data upon reception of the recipient information transmitted from the recipient terminal, wherein the payment request data comprises payer information, recipient information and a payment amount. The recipient terminal is adapted to forward the encrypted payment request data and the payment amount to the payment server. The payment server is adapted to verify the encrypted payment request data and the payment amount, to perform a payment according to a verification result, and to return encrypted payment result data to the recipient terminal. The recipient terminal is further adapted to return the encrypted payment result data to the payer terminal.