## 5 Implementation of Secure IoT-Based Communication System
### Publisher Implementation at the IoT Node
Development of lightweight dynamic key exchange protocols, such as EDHOC or identity-based encryption, to reduce reliance on static keys. 4. Embedding intrusion detection capabilities within the bridge application to detect anomalies and enhance runtime security. 5. Extending performance evaluation to battery-powered IoT devices, including wearables and implantables, in real hospital or smart clinic settings. In conclusion, this work offers a practical and scalable contribution toward securing healthcare IoT systems. By combining efficient cryptographic techniques with strategic architectural layering, it addresses the core challenges of securing sensitive health data without compromising performance or scalability. **Author Contributions:** Conceptualization, S.A. and D.B. ; methodology, S.A. and D.B. ; software, S.A.; validation, S.A., D.B. and W.A. ; investigation, S.A.; resources, S.A.; data curation, S.A.; writing--original draft preparation, S.A.; writing--review and editing, S.A., D.B. and W.A. ; visualization, S.A.; supervision, D.B. ; project administration, S.A.; All authors have read and agreed to the published version of the manuscript. **Funding:** This research received no external funding. **Data Availability Statement:** The original data presented in the study are openly available in FigShare at [[https://doi.org/10.6084/m9.figshare.c7836779](https://doi.org/10.6084/m9.figshare.c7836779)]([https://doi.org/10.6084/m9.figshare.c7836779](https://doi.org/10.6084/m9.figshare.c7836779)). **Conflicts of Interest:** The authors declare no conflict of interest. ## References

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