Embodiments of the present application relate to a method for data communication, a system for data communication, and a computer program product for data communication. A method for data communication is provided. The method includes identifying one or more first users located within a present range of a location of a second user, comparing an authorization code with one or more exchange codes pre-allocated to the one or more first users, and verifying validity of the authorization code, and in the event that, among the one or more exchange codes of the one or more first users within a definite range of the second user location, an exchange code matching the authorization code of the second user exists, and the authorization code of the second user is determined to be valid, performing a data exchange between the second user and the first user.