Secure IT systems : 27th Nordic Conference NordSec 2022 Reykjavic Iceland November 30–December 2 2022 : proceedings On the Effectiveness of Intersection Attacks in Anonymous Microblogging Data Privacy in Ride Sharing Services: From an Analysis of Common Practices to Improvement Location Privacy 5G AKA and Enhancements Local Differential Privacy for Private Construction of Classification Algorithms IMSI Probing: Possibilities and Limitations Honeysweeper: Towards stealthy honeytoken fingerprinting techniques Towards Self Monitoring Enclaves: Side Channel Detection using Performance Counters DeCrypto: Finding Cryptocurrency Miners on ISP networks Detection of Voice Conversion Spoofing Attacks using Voiced Speech A Wide Network Scanning for Discovery of UDP Based Reflectors in the Nordic Countries GPU FAN: Leaking Sensitive Data From Air Gapped Machines via Covert Noise from GPU Fans Simplex: Repurposing Intel Memory Protection Extensions for Secure Storage Automatic Implementations Synthesis of Secure Protocols and Attacks from Abstract Models How to Avoid Repetitions in Lattice based Deniable Zero Knowledge Proofs Obfuscation resilient Semantic Functionality Identification Through Program Simulation Malware Analysis with Symbolic Execution and Graph Kernel WearSec: Towards Automated Security Evaluation of Wireless Wearable Devices Maraudrone’s Map: An Interactive Web Application for Forensic Analysis and Visualization of DJI Drone Log Data VinciDecoder: Automatically Interpreting Provenance Graphs into Textual Forensic Reports with Application to OpenStack. Actionable Cyber Threat Intelligence for Automated Incident Response. This book constitutes the refereed proceedings of the 27th Nordic Conference on Secure IT Systems NordSec 2022 held in Reykjavic Iceland during November 30 – December 2 2022. The 20 full papers presented in this volume were carefully reviewed and selected from 89 submissions. The NordSec conference series addresses a broad range of topics within IT security and privacy.