This book constitutes the refereed proceedings of the Third International Conference on Autonomic and Trusted Computing, ATC 2006, held in Wuhan, China in September 2006.

The 57 revised full papers presented together with 2 keynotes were carefully reviewed and selected from 208 submissions. The papers are organized in topical sections on automomic and organic computing and communications; trust models and trustworthy systems and services; cryptography, security, and privacy; and reliability, fault-tolerance and dependable systems.