Smart sensor networks fall into a new sensor network paradigm that involves individuals in the sensing data collection process. While prior sensor network paradigms focused on collecting ephemeral data about the surrounding environment by means of a static sensor node topology, smart sensor networks collect and process large amounts of data regarding daily life activities. Being humans the central focus of this new kind of environments, there arise new information security challenges. In addition, the nature of the sensed data results in substantial user privacy threats. In this paper, the authors aim to start a discussion around these critical issues by providing an outline of several important information security and privacy challenges.