This volume constitutes the papers of several workshops which were held in conjunction with the 4th International Conference on Science of Cyber Security Workshops, SciSec 2022, held in Matsue, Japan, in August 10–12, 2022.

​AI Crypto and Security Workshop (AI-CryptoSec).- Image Data Recoverability against Data Collaboration and its Countermeasure.- Image Data Recoverability against Data Collaboration and its Countermeasure.- Human Security Behavior Assistance in the Cyber-physical Space.- A Privacy-preserving Electricity Theft Detection (PETD) Scheme for Smart Grid.- Design and implementation of VCP network for Open Flow.- Theory and Application of Blockchain and NFT Workshop (TA-BC-NFT).- Medical waste treatment process based on Blockchain technology - a case study of Covid-19 waste handling in Vietnam.- Blockchain technology-based management of blood and its products - a case study in Vietnam.- Application of the elimination competition mechanism based on blockchain multi-supervision in vehicle data sharing.- Economic Perspective of Cybersecurity: Principles and Strategies.-  Towards a Dynamic Reputation Management Scheme for Cross-chain Transactions.- Mathematical Science of Quantum Safety and its Application Workshop (MathSci-Qsafe).- Revisiting Security of Symmetric-Key Encryption with Imperfect Randomness and Correlation between Source and Keys.- A Secure Image-Video Retrieval Scheme with Attribute-Based Encryption and Multi-Feature Fusion in Smart Grid.- A Survey on Privacy Preserving Synthetic Data Generation and a Discussion on a Privacy-Utility Trade-off Problem.- Multi-Client Private Decision Tree Classification using Threshold Fully Homomorphic Encryption.- Advances in adversarial attacks and defenses in Intrusion Detection System: A survey.- Zero-touch Provisioned Device Lifecycle and Its Security in IoT.- Activation Code Delivery on V2X Pseudonym Certificate Revocation.- Federated Active Learning.

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