Zhang-Kennedy, LeahMekhail, ChristineAbdelaziz, YomnaChiasson, Sonia2021-10-182021-10-182016-06-21https://doi.org/10.1145/2930674.2930716http://hdl.handle.net/10012/17645© {Zhang-Kennedy, Mekhail, Abdelaziz, Chiasson, | ACM} {2016}. This is the author's version of the work. It is posted here for your personal use. Not for redistribution. The definitive Version of Record was published in {Proceedings of the The 15th International Conference on Interaction Design and Children}, https://doi.org/10.1145/2930674.2930716.The rise in mobile media use by children has heightened parents' concerns for their online safety. Through semi-structured interviews of parent-child dyads, we explore the perceived privacy and security threats faced by children aged seven to eleven along with the protection mechanisms employed. We identified four models of privacy held by children. Furthermore, we found that children's concerns fit into four child-adversary threat models: child-peers, child-media, child-strangers, and child-parents. Their concerns differed from the five threat models held by the parents: child-peers, child-media, child-strangers, child-technology, and child-self. Parents used a variety of protection strategies to minimize children's exposure to external threats. In reality, however, our results suggest that security and privacy risks from an internal family member or a friend are far more common than harm from outsiders.enPrivacyThreat ModelsUsable Privacy and SecurityHuman FactorsChild-Computer InteractionMobileArticle