Method for processing data displayed on a screen of a multimedia kiosk comprising a contactless payment terminal (TPSC), said method being implemented within said multimedia kiosk, method comprising: - a step for detecting a presence of a user; - a step of modification, by means of an interactive management module (ModGI), of a common advertisement message, broadcast by said multimedia kiosk, into a personalized advertisement message; - at least one step for implementing a payment transaction by means of the contactless payment terminal for the purchase of a product or a service subsequently to the display of the personalized advertisement message to said user; implementing of a transaction comprising: - a step of reception, by the interaction management module (ModGI), of a piece of data representing a user's willingness to make a purchase related to the personalized advertisement message; - a step of transmission, to a processing server (SRVT), of data for creating an acceptance profile (PrAc), comprising the number of the contactless payment terminal; - a step for receiving said acceptance profile (PrAc), created by said server (SRVT), said acceptance profile (PrAc) comprising a dataset for said contactless payment terminal (TPSC) for allowing it implementing a payment transaction, the dataset being in a cyphered form; - a step of transmission of said acceptance profile (PrAc) to said contactless payment terminal (TPSC); - a step for the obtaining, by the contactless payment terminal (TPSC) and coming from a payment means of the user, of data necessary to make a payment; - a step of instantiation of a transaction by the contactless payment terminal (TPSC), with said data and said acceptance profile (PrAc). - a step for detecting a presence of a user; - a step of modification, by means of an interactive management module (ModGI), of a common advertisement message, broadcast by said multimedia kiosk, into a personalized advertisement message; - at least one step for implementing a payment transaction by means of the contactless payment terminal for the purchase of a product or a service subsequently to the display of the personalized advertisement message to said user; - a step of reception, by the interaction management module (ModGI), of a piece of data representing a user's willingness to make a purchase related to the personalized advertisement message; - a step of transmission, to a processing server (SRVT), of data for creating an acceptance profile (PrAc), comprising the number of the contactless payment terminal; - a step for receiving said acceptance profile (PrAc), created by said server (SRVT), said acceptance profile (PrAc) comprising a dataset for said contactless payment terminal (TPSC) for allowing it implementing a payment transaction, the dataset being in a cyphered form; - a step of transmission of said acceptance profile (PrAc) to said contactless payment terminal (TPSC); - a step for the obtaining, by the contactless payment terminal (TPSC) and coming from a payment means of the user, of data necessary to make a payment; - a step of instantiation of a transaction by the contactless payment terminal (TPSC), with said data and said acceptance profile (PrAc).