# FODIT: A Filter-Based Module for Optimizing Data Storage in B5G IoT Environments
## 2 Background
### Filters
Implemented with a cuckoo filter, well-suited to the high data volume and performance demands of IoT systems, FODIT prevents the storage of duplicate data and enables efficient membership queries without directly accessing the underlying storage. Our evaluation shows that these features lead to significant improvements in both storage efficiency and query overhead reduction. In future work, we aim to enhance the scalability of the filtering mechanism and extend FODIT with heuristics to improve the relevance and quality of stored information, further adapting the module to the evolving needs of B5G IoT environments. Additionally, we consider it essential to explore alternative data structures to ensure consistency with the DLT. In this context, incorporating context-aware mechanisms could help optimize performance by adapting dynamically to each scenario, particularly under high-density B5G IoT deployments. Finally, we also plan to investigate potential security challenges, ensuring that any improvements do not compromise system performance. **Author Contributions:** Conceptualization, B.R.-C. and F.J.Q.-R.; methodology, B.R.-C., F.J.Q.-R., J.A.-P. and J.Z.-M.; software, B.R.-C., F.J.Q.-R. and J.Z.-M.; validation, B.R.-C. and F.J.Q.-R; investigation, B.R.-C. and F.J.Q.-R.; resources, F.J.Q.-R. and J.A.-P.; writing--original draft preparation, B.R.-C. and F.J.Q.-R.; writing--review and editing, J.A.-P. and [PERSON]; visualization, [PERSON] and [PERSON]; supervision, [PERSON]. All authors have read and agreed to the published version of the manuscript. **Funding:** This work was partially supported by the Research Project TED2021-132073B-I00 PHADAS, funded by MCIN/AEI/10.13039/501100011033 and NextGenerationEU/PRTR, and by the University of Jaen through the research support operational plan via action 8a (to the first author). **Data Availability Statement:** The data presented in this study are available on request from the corresponding author. **Conflicts of Interest:** The authors declare no conflicts of interest. ## Abbreviations

The following abbreviations are used in this manuscript:

B5G Beyond 5G

IoT Internet of Things

DB Database

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