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To fill this gap, we conducted a qualitative study of 18 U.S. families with children ages 5-11. We found that children recognized certain privacy and security components from the contextual integrity framework, but children ages 5-7 had gaps in their knowledge. Children developed some strategies to manage concerns but largely relied on parents for support. Parents primarily used passive strategies to mediate children's device use and largely deferred teaching children about these concerns to the future. We argue that helping children develop strong privacy and security practices at a young age will prepare them to manage their privacy and security as adolescents and adults. We offer recommendations to scaffold children's learning on privacy and security.<\/jats:p>","DOI":"10.1145\/3134699","type":"journal-article","created":{"date-parts":[[2017,12,6]],"date-time":"2017-12-06T16:23:15Z","timestamp":1512577395000},"page":"1-21","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":134,"title":["'No Telling Passcodes Out Because They're Private'"],"prefix":"10.1145","volume":"1","author":[{"given":"Priya","family":"Kumar","sequence":"first","affiliation":[{"name":"University of Maryland, College Park, MD, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shalmali Milind","family":"Naik","sequence":"additional","affiliation":[{"name":"University of Maryland, College Park, MD, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Utkarsha Ramesh","family":"Devkar","sequence":"additional","affiliation":[{"name":"University of Maryland, College Park, MD, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marshini","family":"Chetty","sequence":"additional","affiliation":[{"name":"Princeton University, Princeton, NJ, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tamara L.","family":"Clegg","sequence":"additional","affiliation":[{"name":"University of Maryland, College Park, MD, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jessica","family":"Vitak","sequence":"additional","affiliation":[{"name":"University of Maryland, College Park, MD, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"320","published-online":{"date-parts":[[2017,12,6]]},"reference":[{"key":"e_1_2_1_1_1","doi-asserted-by":"publisher","DOI":"10.1145\/2207676.2207727"},{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1145\/2818048.2819928"},{"key":"e_1_2_1_3_1","volume-title":"It's complicated: the social lives of networked teens","unstructured":"danah boyd. 2014. 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