The Elastica Cloud Threat Labs team publishes the Shadow Data Report to provide actionable insights into key trends and challenges in securing cloud apps and services and, more importantly, the business crit- ical data stored in them. The 2H 2015 report’s ndings are based on the analysis of nearly 63M documents Elastica customers are storing and sharing in popular collaboration and cloud le sharing services such as Box, Dropbox, Google Drive, and O ce 365. As in previous reports, this report not only examines the use of unsanctioned apps, but also provides deep insights into the use of sanctioned apps. All data continues to be aggregated and anonymized across the Elastica CloudSOC platform to protect customer con dentiality.