This two-volume proceedings set LNCS 15056-15057 constitutes the proceedings of 26th International Conference on Information and Communications Security, ICICS 2024, in Mytilene, Greece, during August 26-28, 2024.The 32 full papers presented in this book were carefully selected and reviewed from 123 submissions.

.- Attacks. .- How to Design Honey Vault Schemes. .- New Result for Breaking NTRU Encryption with Multiple Keys in Polynomial Time. .- Improving Differential-Neural Cryptanalysis for Large-State SPECK. .- Evasion attempt for the malicious PowerShell detector considering feature weights. .- A Fast Framework for Efficiently Constructing Valuable Cubes. .- A Survey on Acoustic Side Channel Attacks on Keyboards. .- Trust. .- Enhancing TrUStAPIS Methodology in the Web of Things with LLM-generated IoT Trust Semantics. .- DMA: Mutual Attestation Framework for Distributed Enclaves. .- Cabin: Confining Untrusted Programs within Confidential VM. .- Anomaly detection. .- UARC:Unsupervised Anomalous Traffic Detection with Improved U-shaped Autoencoder and RetNet based Multi-Clustering. .- An Investigation into the Performance of Non-Contrastive Self-Supervised Learning Methods for Network Intrusion Detection. .- Impact of Recurrent Neural Networks and Deep Learning Frameworks on Adaptive Real-time Lightweight Time Series Anomaly Detection. .- Privacy. .- Secure and Robust Privacy-Preserving Federated Learning For Heterogeneous Resource. .- Privacy-preserving Logistic Regression Model Training Scheme by Homomorphic Encryption. .- Privacy preserving and verifiable outsourcing of AI processing for cyber-physical systems. .- Investigating the Privacy Risk of using Robot Vacuum Cleaners in Smart Environments.