This book constitutes the refereed post-proceedings of the 9th International Conference on Mobile, Secure, and Programmable Networking, MSPN 2023, held in Paris, France, during October 26–27, 2023.The 15 full papers included in this book were carefully reviewed and selected from 31 submissions.

IoTDisco: Strong yet Lightweight End-to-End Security for the Internet of Constrained Things.- StrucTemp-GNN: An Intrusion Detection Framework in IoT Networks using Dynamic Heterogeneous Graph Neural Networkers.- Generating Synthetic Data to Improve Intrusion Detection in Smart City Network Systems.- Building the Shortest Path Database in Urban Traffic Network Using RAO Algorithm.- Strengthening applets on legacy SIM cards with singularization, a new Moving Target Defense strategy.- A Smart Network Repository Based on Graph Database.- Enhancing Security in Connected Medical IoT Networks through Deep Learning-Based Anomaly Detection.- Blockchain-Driven Animal Healthcare: Leveraging NFTs, IPFS, and Smart Contracts for Comprehensive Animal Medical Data.- Transforming Child Health Records: Integrating Blockchain, NFTs, and IPFS for Enhanced Medical Data Management.- Privacy-Preserving Tree-Based Inference with FHE.- Privacy-Preserving Tree-Based Inference with FHE.- Multiple Person Tracking based on Gait Identification using Kinect and OpenPose.- Evaluating image similarity using contextual information of images with pre-trained models.- AI vs. Dinosaurs - Automated Re Implementation of Legacy Mainframe Applications in Java By Combining program synthesis And GPT.- Fully Distributed Deep Neural Network: F2D2N.