This book constitutes the refereed proceedings of the Second International Symposium on Cyber
Security CSS 2015 held in Coeur d'Alene ID USA in April 2015. The 9 revised full papers
presented were carefully reviewed and selected from 20 papers. The papers reflect four areas of
scholarly work: permissions and trust evaluation implementation and management cloud and
device security and privacy social implications of networked and mobile applications system
and process assessments for improved cybersecurity.