Network Security -- A Characterisation of Smart Grid DoS Attacks -- Security and Privacy in 5G Applications: Challenges and Solutions -- Alarm Elements based Adaptive Network Security Situation Prediction Model -- Watermark based Tor Cross-domain Tracking System For Tor Network Traceback -- System Security -- Research on IoT Security Technology and Standardization in the 5G Era -- MIMEC Based Information System Security Situation Assessment Model -- IoTFC: A Secure and Privacy Preserving Architecture for Smart Buildings -- A Secure Experimentation Sandbox for the design and execution of trusted and secure analytics in the aviation domain -- Machine Learning -- Research on a Hybrid EMD-SVR Model for Time Series Prediction -- Distant Supervision for Relations Extraction via Deep Residual Learning and Multi-Instance Attention in Cybersecurity -- User Identity Linkage across Social Networks based on Neural Tensor Network -- An Efficient and Privacy-Preserving Physiological Case Classification Scheme for E-healthcare System -- A multi-class detection system for Android malicious Apps based on color image features -- Authentication and Access Control -- PUF-based Two-factor Group Authentication in Smart Home -- An Authentication Framework in ICN-enabled Industrial Cyber-Physical Systems -- Access Control for Wireless Body Area Networks -- FIDO - that dog won't hunt -- Blockchain-enabled user authentication in zero trust Internet of Things -- Cloud Security -- Security Analysis and Improvement of a Dynamic-Hash-Table based Auditing Scheme for Cloud Storage -- A Public Auditing Framework against Malicious Auditors for Cloud Storage based on Blockchain -- A Secure and Verifiable Outsourcing Scheme for Machine Learning Data -- Support Vector Machine Intrusion Detection Scheme Based on Cloud-Fog Collaboration -- An Multi-feature Fusion Object Detection System for Mobile IoT Devices and Edge Computing -- Cryptography -- Generative image steganography based on digital Cardan Grille -- Pixel Grouping Based Image Hashing for DIBR 3D Image -- Improved Conditional Differential Analysis on NLFSR Based Block Cipher KATAN32 with MILP -- Applied Cryptography -- A Verifiable Combinatorial Auction Scheme with Bidder's Privacy Protection -- A Multi-user Shared Searchable Encryption Scheme Supporting SQL Query -- Forward Secure Searchable Encryption with Conjunctive-Keyword Supporting Multi-User -- A3BAC: Attribute-Based Access Control Model with Anonymous Access -- Blockchain-based Decentralized Privacy-Preserving Data Aggregation (BDPDA) Scheme for Smart Grid.

This book constitutes the refereed proceedings of the Third International Conference on Security and Privacy in New Computing Environments, SPNCE 2020, held in August 2020. Due to COVID-19 pandemic the conference was held virtually. The 31 full papers were selected from 63 submissions and are grouped into topics on network security; system security; machine learning; authentication and access control; cloud security; cryptography; applied cryptography.