Midas is a touch-based personalization system that bridges the gap between personal area networks (PANs) and explicit authentication. It is designed to interact with ubiquitous interfaces in the objects and environment surrounding us in order to achieve seamless access to information via public and pseudo-public surfaces and environments that modify themselves to the needs to the users on the fly and on contact. By confining the communication to touched object while avoiding the need to use an explicit authentication token such as a RFID, we enable new means of customizing our surroundings to our needs.