This book constitutes the refereed proceedings of the 8th International Conference on Trust and Privacy in Digital Business, TrustBus 2012, held in Vienna, Austria, in September 2012 in conjunction with DEXA 2012. The 18 revised full papers presented together with 12 presentations of EU projects were carefully reviewed and selected from 42 submissions. The papers are organized in the following topical sections, web security, secure management processes and procedures, access control, intrusion detection - trust, applied cryptography, secure services, databases, and data warehouses, and presentations of EU projects.