This chapter examines two areas of digital life which are raising particular concern amongst both researchers and the general public. Digital information space is constructed from shared information, which may be personal; it is therefore important to consider who it is shared with and who can ‘overhear’. Security must be considered in conjunction with privacy: how private information is protected and kept out of public space. Expectations of privacy in certain spaces may be based on false assumptions and must be carefully considered. Boundaries between private and public, and who might be watching, may be less clear than in non-digital space. Connected physical objects in the internet of things may also reveal private information about our behaviour, and even critical information about our health and wellbeing. Digital privacy aspects invade the ‘real world’ with increased digital surveillance and sousveillance, as well as privacy implications of data analysis such as face recognition.