An Ontology-based Approach for Setting Security Policies in Smart Homes -- Clap Auth: A Gesture-based User-Friendly Authentication Scheme to Access a Secure Infrastructure -- User Authentication on Headset-like Devices By Bio-Acoustic Signals.-The measurable Environment as Nonintrusive Authentication Factor On the Example of WiFi Beacon Frames -- Protecting FIDO Extensions against Man-in-the-Middle Attacks -- Authentication, Authorization and Selective Disclosure for IoT Data Sharing using Verifiable Credentials and Zero-Knowledge Proofs -- Privacy-Preserving Speaker Verification and Speech Recognition -- An E-Voting System Based on Tornado Cash -- Linking Contexts from Distinct Data Sources in Zero Trust Federation.