This book constitutes the refereed proceedings of the 12th International Conference on Trust
Privacy and Security in Digital Business TrustBus 2015 held in Valencia Spain in September
2015 in conjunction with DEXA 2015. The 17 revised full papers presented were carefully
reviewed and selected from 45 submissions. The papers are organized in the following topical
sections: access control trust and reputation in pervasive environments trust and privacy
issues in mobile environments security and privacy in the cloud security policies usability
issues and privacy requirements and privacy audit.
