This position paper tries to outline a framework for defining trackers in smart phones and lists mechanisms for identifying them. It hopes to serve as the foundation for the work done in the Tracking-the-Trackers project. In section 1 we start with an abstract analysis of levels of unwanted behaviour in the context of tracking. Next, in section 2, we focus on an attacker’s perspective, on anonymity and pseudonymity. This foundation allows us to define terms which are needed throughout the p...