@inproceedings{rabedafe:2025:isc2,

title = {Optimizing Secure Group Communication in IoT Networks for Smart City Applications},

author = {Hafiz Humza Mahmood Ramzan and Laura Belli and Luca Davoli and Gianluigi Ferrari},

doi = {10.1109/ISC266238.2025.11293325},

issn = {2687-8860},

year  = {2025},

date = {2025-12-23},

urldate = {2025-01-01},

booktitle = {2025 IEEE International Smart Cities Conference (ISC2)},

pages = {1-6},

address = {Patras, Greece},

abstract = {The Internet of Things (IoT) paradigm envisions a pervasive “network of networks,” facilitating effortless communication and data exchange across diverse domains. Nonetheless, the rise of IoT brings forth considerable challenges, especially in the realm of Secure Group Communications (SGCs), requiring strong security measures such as cryptographic techniques and encryption protocols. Since it is essential to balance security and efficiency in IoT scenarios, this paper examines encryption systems and security challenges possibly affecting IoT networks, then presenting optimization techniques including data aggregation, delta coding, compression, and selective forwarding. Then, through OMNeT++ simulations, the effects of these strategies on relevant performance metrics (such as latency, energy consumption, and data size) are described. The obtained results indicate that incorporating these optimization techniques greatly improves communication efficiency, leading to 40% latency decrease, 25% energy consumption decrease, and $mathbf5 0 %$ data size reduction. Thus, these findings highlight the effectiveness of optimization techniques in enhancing SGCs within IoT ecosystems, opening to future research activities on adaptive security mechanisms and lightweight cryptographic approaches.},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{radabefe:2025:icities,

title = {Adaptive IoT Communication Protocols and Edge Optimization for Smart Urban Mobility Systems},

author = {Hafiz Humza Mahmood Ramzan and Luca Davoli and Laura Belli and Gianluigi Ferrari},

url = {https://icities25.unicas.it/program},

year  = {2025},

date = {2025-08-17},

urldate = {2025-08-17},

booktitle = {2025 11th Italian Conference on ICT for Smart Cities and Communities (I-CiTies)},

pages = {1-2},

address = {Gaeta, Italy},

abstract = {Optimized communication protocols are required to deal with services, such as energy and traffic management, due to rapid proliferation of smart urban systems in time critical scenarios. This study proposes to optimize communication protocols for large scale Internet of Things (IoT) infrastructures utilizing edge computing architecture. Our proposed protocol is evaluated using co-simulation environments OMNeT++ and SUMO to evaluate adaptive communication via Constrained Application Protocol (CoAP) and MQTT. Our results show that CoAP reduces the amount of time needed for message processing, while MQTT minimizes delivery failures. The results emphasize that following prescribed rules for communication makes urban mobility more flexible and efficient in new city systems.},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}

@inproceedings{darabefe:2024:foodops,

title = {CoAP-based Digital Twin Modelling of Heterogeneous IoT Scenarios},

author = {Luca Davoli and Hafiz Humza Mahmood Ramzan and Gianluigi Laura Ferrari Belli},

doi = {10.46354/i3m.2024.foodops.016},

year  = {2024},

date = {2024-10-20},

urldate = {2024-01-01},

booktitle = {10th International Food Operations and Processing Simulation Workshop (FoodOPS 2024)},

pages = {1-5},

address = {Tenerife, Spain},

abstract = {Modern societies nowadays require more and more abstraction efforts to hide the complexity of underlying systems and infrastructures. To this end, the concept of Digital Twin (DT) has recently emerged as a key enabler for the digital transformation of well-established architectures toward their virtual representation, opening to intelligent processing capabilities (e.g., monitoring, simulation, prediction, optimization). Aside from defining DTs to enhance these services, another key paradigm that is noteworthy of attention is the Internet of Things (IoT), enabling data and information collection through heterogeneous textitsmart devices (often equipped with sensors and actuators). Thus, combining DTs and IoT together with the Constrained Application Protocol (CoAP) as communication protocol (with its native features), will allow to define scalable and lightweight replicas of real systems, and exploit key features (e.g., service and resource discovery) to provide end users with smart solutions. In this paper, a modelling paradigm for heterogeneous IoT scenarios, based on the definition of a DT for each entity involved in a specific context to be mapped, is detailed. This will allow to textita-priori estimate the behaviour of an IoT ecosystem and provide well-known interaction endpoints to request data from/pushing information to the hidden lower layers of the same ecosystem.},

keywords = {},

pubstate = {published},

tppubtype = {inproceedings}

}