Access Control -- A Unified Access Control Model for Calibration Traceability in Safety-Critical IoT -- Learning Attribute-Based and Relationship-Based Access Control Policies with Unknown Values -- Reliability and Security for Safety-Critical Service Compositions -- AI/ML in Security -- A Defence Against Trojan Attacks on Deep Neural Networks -- An Overview of Cyber Threat Intelligence Platform and Role of Artificial Intelligence and Machine Learning -- Machine Learning based Android Vulnerability Detection: A Roadmap -- Privacy and Web Security -- Revelio: A Lightweight Captcha Solver using a Dictionary based Approach -- Privacy-Preserving Friend Recommendation in an Integrated Social Environment -- A Toolkit for Security Awareness Training against Targeted Phishing -- Forensic Source Identification of OSN Compressed Images -- Cryptography -- Cheating Detectable Ramp Secret Sharing with Optimal Cheating Resiliency -- LiARX: A Lightweight Cipher based on the LTS DesignStrategy of ARX -- Color Visual Cryptography Schemes Using Linear Algebraic Techniques over Rings -- Systems Security -- Secure Calculation for Position Information of IoT Device with Few Communication and Small Secret Information -- Attacks on Android-based Smartphones and Impact of Vendor Customization on Android OS Security -- Detection of Malign and Benign PE Files Using Texture Analysis -- Estimating the Cost of Cybersecurity Activities with CAsPeA.

This book constitutes the proceedings of the 16th International Conference on Information Systems Security, ICISS 2020, held in Jammu, India, during December 16-20, 2020. The 11 regular papers, 2 short papers and 3 work-in-progress papers included in this volume were carefully reviewed and selected from a total of 53 submissions. The papers were organized in topical sections named: access control; AI/ML in security; privacy and Web security; cryptography; and systems security.