The two-volume set IFIP AICT 745 + 746 constitutes the refereed proceedings of the 40th IFIP International Conference on ICT Systems Security and Privacy Protection, SEC 2025, held in Maribor, Slovenia, during May 21-23, 2025.

.- Applied Cryptography.

.- CoolTest: Improved Randomness Testing Using Boolean Functions.

.- Towards a lightweight and privacy friendly Architecture for Online Advertising.

.- Future-Proof Asynchronous IoT Backups: An Evaluation of Secure IoT Data Recovery Considering Post Quantum Threats.

.- Checking the Impact of Security Standardization A Case Study on Bluetooth LE Pairing of Internet of Things Devices.

.- Data and Application Security.

.- Generating and Attacking Passwords with Misspellings by Leveraging Homophones.

.- Time is money: A temporal model of cybersecurity.

.- Update at Your Own Risk: Analysis and Recommendations for Update related Vulnerabilities.

.- ”You still have to study” On the Security of LLM generated code.

.- Certifiably robust malware detectors by design.

.- How stealthy is stealthy? Studying the Efficacy of Black Box Adversarial Attacks in the Real World.

.- Identifying and Analyzing Vulnerabilities and Exploits in On Premises Kubernetes.

.- International Workshop on Network and Distributed Systems Security (WNDSS 2025).

.- A Novel Evidence-Based Threat Enumeration Methodology for ICS.

.- Impact Analysis of Sybil Attacks in the Tor Network.

.- Security Metrics for False Data Injection in Smart Grids.

.- BERMUDA: A BPSec Compatible Key Management Scheme for DTNs.

.- A Quantum Algorithm for Assessing Node Importance in the st Connectivity Attack.

.- Flatdc: Automatic Schema Reverse Engineering of FlatBuffers.

.- Time Aware Face Anti Spoofing with Rotation Invariant Local Binary Patterns and Deep Learning.