The invention relates to a method for purchasing a product by a consumer using a computing device. The method includes transmitting product information from a payee to the computing device, obtaining a purchase request for the product from the computing device, wherein the purchase request comprises a security identifier input by the consumer, inferring a consumer identity based on the purchase request and consumer information, authorizing the consumer to access the consumer information based on the purchase request and the consumer identity, wherein the consumer information is used to purchase the product, and generating a purchase authorization for the product and sending the purchase authorization to the payee based on the purchase request and the consumer information.