This book constitutes the refereed proceedings of the 9th International Conference on Trust and Trustworthy Computing, TRUST 2016, held in Vienna, Austria, in August 2016. The 8 full papers presented in this volume were carefully reviewed and selected from 25 submissions. Topics discussed in this year's research contributions included topics such as anonymous and layered attestation, revocation, captchas, runtime integrity, trust networks, key migration, and PUFs. Topics discussed in this year's research contributions included topics such as anonymous and layered attestation, revocation, captchas, runtime integrity, trust networks, key migration, and PUFs.