In some implementations, a terminal device may receive, from a mobile device associated with a user, first information identifying a first facial depth map of the user generated by the mobile device. The terminal device may generate a second facial depth map of the user. The first facial depth map may be generated before the second facial depth map. The terminal device may determine whether the user is authenticated to perform an exchange based on whether the first information identifying the first facial depth map corresponds to second information identifying the second facial depth map. The terminal device may transmit, to the mobile device and based on determining that the user is authenticated, a message indicating that the user is authenticated. The terminal device may receive, from the mobile device, exchange information identifying a credential for performing the exchange.