Contactless payment systems include credit and debit cards, key fobs and other mobile devices such as smartphones that enable secure payments by simply holding the card or other device to a reader terminal. Although there are some similarities between contactless payments and mobile payments, which can also be made on a smartphone, the main difference between them is that mobile payments usually use a wider mobile network or Wi-Fi network, while contactless payments require a direct physical proximity. https://www.confidus...onfidentiality/