This book constitutes the refereed proceedings of the 8th International Conference on Applications and Techniques in Information Security, ATIS 2017, held in Auckland, New Zealand, in July 2017. The 14 revised full papers and 4 short papers presented together with two abstracts of invited talks were carefully reviewed and selected from 29 submissions. The papers are organized in topical sections on Keynote Speeches; Crypto Algorithms and Applications; Attacks; Malware and Malicious Events Detection; System and Network Security.