This book constitutes the thoroughly refereed, selected papers on the Second Cyber Security and Privacy EU Forum, CSP 2014, held in Athens, Greece, in May 2014. The 14 revised full papers presented were carefully reviewed and selected from 90 submissions. The papers are organized in topical sections on security; accountability, data protection and privacy; research and innovation.

This book constitutes the thoroughly refereed selected papers on the 4th Cyber Security and Privacy Innovation Forum, CSP Forum 2015, held in Brussels, Belgium, in April 2015.

The 12 revised full papers presented were carefully reviewed and selected from various submissions. The papers are organized in topical sections such as security and privacy in the cloud; security and privacy technologies; risk and trust; research and innovation in cyber security and privacy.