Abstract: A server (108) for authenticating an interaction between a first user device (104) and a second user device (110) is provided. The server (108) includes a memory unit, a set of modules, a database (232), and a processor. The set of modules comprise a token request processing module (202), a token associating module (204), a token comparison module (210), a distance obtaining module (212) and an interaction processing module (214). The token request processing module (202) receives an input from a first user (102) comprising a location specific token with a location. The token associating module (204) associates the location specific token with the location. The distance obtaining module (212) obtains a distance between a location associated with the first user (102) and the second user (112). The interaction processing module processes an interaction between the first user (102) and the second user (112).