This book constitutes the refereed proceedings of the 24th Nordic Conference on Secure IT Systems, NordSec 2019, held in Aalborg, Denmark, in November 2019.The 17 full papers presented in this volume were carefully reviewed and selected from 32 submissions. network security; platform security and malware;

Privacy.- Privacy Impact Assessment: Comparing Methodologies with a Focus on Practicality.- Rotten Cellar: Security and Privacy of the Browser Cache Revisited.- Improving Privacy through Fast Passive Wi-Fi Scanning.- Cronus: Everlasting Privacy with Audit and Cast.- Network Security.- Using Partial Signatures in Intrusion Detection for Multipath TCP.- Analysis of Topology Poisoning Attacks in Software-Defined Networking.- Client-side Vulnerabilities in Commercial VPNs.- Securing Optical Network by Modern Cryptographic Techniques.- Platform Security and Malware.- A Roadmap for Improving the Impact of Anti-Ransomware Research.- An Experimental Analysis of Cryptojacking Attacks.- My Smartwatch is Mine { Machine Learning Based Theft Detection of Smartwatches.- Even Turing Should Sometimes Not Be Able To Tell: Mimicking Humanoid Usage Behavior for Exploratory Studies of Online Services.- A Study of Security Vulnerabilities and Software Weaknesses in Vehicles.- System and Software Security.- Experimental Analysis of the Laser-induced Instruction Skip Fault Model.- Can Microkernels Mitigate Microarchitectural Attacks?.- MicroSCOPE: Enabling Access Control in Searchable Encryption with the use of Attribute-based Encryption and SGX.- VMIGuard: Detecting and Preventing Service Integrity Violations by Malicious Insiders Using Virtual Machine Introspection.

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