This book constitutes the thoroughly refereed proceedings fo the 9th International Conference on Information Theoretic Security, ICITS 2016, held in Tacoma, WA, USA, in August 2016. The 14 full papers presented in this volume were carefully reviewed and selected from 40 submissions. They are organized around the following topics: secret sharing; quantum cryptography; visual cryptography; cryptographic protocols; entropy, extractors and privacy.
