A mobile payment is a contactless point of sale (POS) transaction between a consumer’s mobile device and a merchant’s POS device. Another name for mobile payment is proximity mobile payment, which emphasizes the consumer’s physical presence at a POS device,The consumer taps his/her mobile device on, or hovers it over,the merchant’s POS terminal to make a payment. Popular uses of mobile payments are at vending machines,for transportation ticketing, and for merchant payment transactions such as in a retail location.