Session 1 Network and System Security -- ACDroid: Detecting Collusion Applications on Smart Devices -- DomainIsolation: Lightweight Intra-enclave Isolation for Confidential Virtual Machines -- Keeping Your Enemies Closer: Shedding Light on the Attacker's Optimal Strategy -- Cyber Attacks against Enterprise Networks: Characterization, Modelling and Forecasting -- Session 2 Cryptography and Authentication -- MCVDSSE: Secure Multi-Client Verifiable Dynamic Symmetric Searchable Encryption -- A Graphical Password Scheme based on Rounded Image Selection -- Implementation of the Elliptic Curve Method -- Almost Injective and Invertible Encodings for Jacobi Quartic Curves -- SeeStar: an Efficient Starlink Asset Detection Framework -- Privacy-enhanced Anonymous and Deniable Post-Quantum X3DH -- Session 3 AI for Security -- Fractional Dynamic: Analysis for Network Malware Propagation -- Enhancing the Anti-steganalysis Ability via Multiple Adversarial Network -- An Empirical study of AI model's Performance for Electricity Load Forecasting with Extreme Weather Conditions -- Session 4 Threat Detection and Analysis -- AST2Vec: A Robust Neural Code Representation for Malicious PowerShell Detection -- Real-time Aggregation for Massive alerts based on Dynamic Attack Granularity Graph -- Decompilation Based Deep Binary-Source Function Matching -- Event-based Threat Intelligence Ontology Model -- Session 5 Web and Privacy Security -- Optimally Blending Honeypots into Production Networks: Hardness and Algorithms -- WebMea: A Google Chrome Extension for Web Security and Privacy Measurement Studies -- Quantifying Psychological Sophistication of Malicious Emails -- SVFL: Secure Vertical Federated Learning on Linear Models -- Session 6: Cryptography and Authentication II -- Multiprime Strategies for Serial Evaluation of eSIDH-Like Isogenies -- Adaptively Secure Constrained Verifiable Random Function -- A Robust Reversible Data Hiding Algorithm Based on Polar Harmonic Fourier Moments -- Session 7: Advanced Threat Detection Techniques and Blockchain -- VaultBox: Enhancing the Security and Effectiveness of Security Analytics -- Two-stage Anomaly Detection in LEO Satellite Network -- Hydra: An Efficient Asynchronous DAG-based BFT Protocol -- Redactable Blockchain in the Permissioned Setting -- Session 8: Workshop Session -- A MULTI-LEVEL Sorting Prediction Enhancement-based two-dimensional Reversible Data Hiding Algorithm for Jpeg Images -- Research on Encrypted Malicious 5G Access Network Traffic identification based on Deep Learning -- A Design of Network Attack Detection Using Causal and Non-causal Temporal Convolutional.

This book constitutes the refereed proceedings of the 5th International Conference on Science of Cyber Security, SciSec 2023, held in Melbourne, VIC, Australia, during July 11-14, 2023. The 21 full papers presented together with 6 short papers were carefully reviewed and selected from 60 submissions. The papers are organized in the topical sections named: ACDroid: Detecting Collusion Applications on Smart Devices; Almost Injective and Invertible Encodings for Jacobi Quartic Curves; Decompilation Based Deep Binary-Source Function Matching.