Abstract: The present invention provides a method of notifying a user of a request for data controlled by a server, the method including the steps of: monitoring, at the server, requests for data controlled by the server; and if a data request is detected which corresponds to a predetermined type of data request, notifying the user of the detected data request via a haptic feedback mechanism provided on a wearable device which is communicably coupled with the server. Embodiments of the invention relate to a wearable device and a system including the server and the wearable device. Embodiments of the invention allow users to be informed non-obtrusively of a potential privacy breach in real-time and may also allow a user to control in a non-intrusive (e.g. eyes-free) manner whether access is given to personal data.