Lecture Notes in Computer Science 11547 Commenced Publication in 1973 Founding and Former Series Editors: Gerhard Goos, Juris Hartmanis, and Jan van Leeuwen Editorial Board Members David Hutchison Lancaster University, Lancaster, UK Takeo Kanade Carnegie Mellon University, Pittsburgh, PA, USA Josef Kittler University of Surrey, Guildford, UK Jon M. Kleinberg Cornell University, Ithaca, NY, USA Friedemann Mattern ETH Zurich, Zurich, Switzerland John C. Mitchell Stanford University, Stanford, CA, USA Moni Naor Weizmann Institute of Science, Rehovot, Israel C. Pandu Rangan Indian Institute of Technology Madras, Chennai, India Bernhard Steffen TU Dortmund University, Dortmund, Germany Demetri Terzopoulos University of California, Los Angeles, CA, USA Doug Tygar University of California, Berkeley, CA, USA More information about this series at http://www.springer.com/series/7410 Julian Jang-Jaccard • Fuchun Guo (Eds.) Information Security and Privacy 24th Australasian Conference, ACISP 2019 Christchurch, New Zealand, July 3–5, 2019 Proceedings 123 Editors Julian Jang-Jaccard Fuchun Guo Massey University University of Wollongong Palmerston North, New Zealand Wollongong, NSW, Australia ISSN 0302-9743 ISSN 1611-3349 (electronic) Lecture Notes in Computer Science ISBN 978-3-030-21547-7 ISBN 978-3-030-21548-4 (eBook) https://doi.org/10.1007/978-3-030-21548-4 LNCS Sublibrary: SL4 – Security and Cryptology © Springer Nature Switzerland AG 2019 This work is subject to copyright. All rights are reserved by the Publisher, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. 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This Springer imprint is published by the registered company Springer Nature Switzerland AG The registered company address is: Gewerbestrasse 11, 6330 Cham, Switzerland Preface This volume contains the papers presented at the 24th Australasian Conference on Information Security and Privacy (ACISP 2019), which was held at the University of Canterbury during July 3–5, 2019, in Christchurch, New Zealand. ACISP is an annual international forum for international researchers and industry experts to present and discuss the latest research, trends, breakthroughs, and challenges in the domain of information security, privacy, and cybersecurity. This year we received 129 submissions of excellent quality from 31 countries around the world. Submitted papers were initially screened based on the submission guidelines. Then, the papers were assigned to and evaluated by at least three Program Committee members. Further, the papers were scrutinized during an extensive dis- cussion. Finally, we accepted 32 full papers and eight short papers to be included in the conference program a total of 40 papers. The revised papers were not subject to editorial review and the authors bear full responsibility for their content. The sub- mission and review process was supported by the EasyChair conference submission server. Among the accepted papers, the ACISP chairs selected two papers to be given the Best Paper Award based on their novelty and scores. Further, one paper was awarded the Best Student Paper. The Best Paper Award went to: – “Ciphertext-Delegatable CP-ABE for a Dynamic Credential: A Modular Approach” by Jongkil Kim, Willy Susilo, Joonsang Baek, Surya Nepal, and Dongxi Liu – “Field Extension in Secret-Shared Form and Its Applications to Efficient Secure Computation” by Ryo Kikuchi, Nuttapong Attrapadung, Koki Hamada, Dai Ikarashi, Ai Ishida, Takahiro Matsuda, Yusuke Sakai, and Jacob Schuldt The Best Student Paper was awarded to: – “Fast-to-Finalize Nakamoto-Like Consensus Protocol” by Shuyang Tang, Sherman S. M. Chow, Zhiqiang Liu, and Joseph Liu This year, we were very honoured to have the Jennifer Seberry Lecture delivered by Professor Jennifer Seberry herself (University of Wollongong, Australia). The program also included three invited talks by Professor Jong Sou Park (Korea Aerospace University, South Korea), Associate Professor Joseph K. Liu (Monash University, Australia), and Professor Zbigniew Kalbarczyk (University of Illinois at Urbana-Champaign, USA). We would like to thank all authors who submitted their papers to ACISP 2019, and the conference attendees for their interest and support. We thank the Program Committee members and the external reviewers for their hard work in reviewing the submissions—the conference could not be successful without their expert reviews. vi Preface We thank the publication chairs, Mengmeng Ge and Hyoungshick Kim, for their hard work in preparing the proceedings. We also thank the Organizing Committee and all volunteers for their time and effort dedicated to managing the conference. April 2019 Julian Jang-Jaccard Fuchun Guo Organization General Chairs Dong Seong Kim The University of Queensland, Australia Jin B. Hong University of Western Australia, Australia Program Chairs Julian Jang-Jaccard Massey University, New Zealand Fuchun Guo University of Wollongong, Australia Publication Chairs Mengmeng Ge Deakin University, Australia Hyoungshick Kim Sungkyunkwan University, South Korea Publicity Chairs William Liu Auckland University of Technology, New Zealand Simon Yusuf-Enoch University of Canterbury, New Zealand Financial Chairs Miguel Morales University of Canterbury, New Zealand Program Committee Cristina Alcaraz University of Malaga, Spain Muhammad Rizwan Asghar The University of Auckland, New Zealand Man Ho Au The Hong Kong Polytechnic University, SAR China Joonsang Baek University of Wollongong, Australia Shi Bai Florida Atlantic University, USA Zubair Baig Edith Cowan University, Australia Lynn Batten Deakin University, Australia Elisa Bertino Purdue University, USA Jinjun Chen University of Technology, Sydney Liqun Chen University of Surrey, UK Rongmao Chen National University of Defense Technology, China Shiping Chen CSIRO, Australia Xiaofeng Chen Xidian University, China Josep Domingo-Ferrer Universitat Rovira i Virgili, Spain Ernest Foo Queensland University of Technology, Australia viii Organization Fuchun Guo University of Wollongong, Australia Gerhard Hancke City University of Hong Kong, SAR China Jin Hong University of Western Australia, Australia Qiong Huang South China Agricultural University, China Xinyi Huang Fujian Normal University, China Tibor Jager Paderborn University, Germany Julian Jang-Jaccard Massey University, New Zealand Peng Jiang The Hong Kong Polytechnic University, SAR China Dong Seong Kim The University of Queensland, Australia Huy Kang Kim Korea University, South Korea Jongkil Kim University of Wollongong, Australia Noboru Kunihiro The University of Tokyo, Japan Fabien Laguillaumie Université de Lyon 1/LIP, France Jianchang Lai Nanjing Normal University, China Dongxi Liu CSIRO, Australia Joseph Liu Monash University, Australia Javier Lopez University of Malaga, Spain Mark Manulis University of Surrey, UK Mitsuru Matsui Mitsubishi Electric, Japan Kazuhiko Minematsu NEC Corporation, Japan Chris Mitchell Royal Holloway, University of London, UK Kirill Morozov University of North Texas, USA Yi Mu Fujian Normal University, China Khoa Nguyen Nanyang Technological University, China Thomas Peyrin Nanyang Technological University, China Duong-Hieu Phan University of Limoges, France Josef Pieprzyk Queensland University of Technology, Australia Chun Ruan Western Sydney University, Australia Pierangela Samarati University of Milan, Italy Marcos Simplicio Escola Politecnica of the University of São Paulo, Brazil Leonie Simpson Queensland University of Technology, Australia Ron Steinfeld Monash University, Australia Willy Susilo University of Wollongong, Australia Atsushi Takayasu The University of Tokyo, Japan Qiang Tang New Jersey Institute of Technology, USA Clark Thomborson The University of Auckland, New Zealand Damien Vergnaud Université Pierre et Marie Curie, France Ding Wang Peking University, China Huaxiong Wang Nanyang Technological University, China Guomin Yang University of Wollongong, Australia Ji Won Yoon Korea University, South Korea Yong Yu Shaanxi Normal University, China Mingwu Zhang Hubei University of Technology, China Organization ix Additional Reviewers Anglès-Tafalla, Carles Herranz, Javier Ramchen, Kim Bamiloshin, Michael Hu, Jingwei Ruan, Ou Banegas, Gustavo Hu, Kexin Sakzad, Amin Banik, Subhadeep Hu, Qinwen Santini, Paolo Bemmann, Pascal Hua, Zhen Sarkar, Santanu Bert, Pauline Huang, Jianye Shen, Hua Blanco Justicia, Alberto Hébant, Chloé Silva, Marcos V. M. Buriro, Attaullah Inoue, Akiko Singla, Ankush Castagnos, Guilhem Isobe,