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Cloud computing has a significant impact on information technology solutions for both organizations and researchers. Different users share critical data over the cloud where failures are normal rather than exceptional. Therefore, data fragmentation and data replication algorithms are useful to enhance data security. Three important questions need to be answered carefully: (1) Which files should be replicated; (2) how many appropriate new replicas should be placed; (3) where the new replicas should be stored. In this paper, we propose a CSO-based approach for secure data replication (SDR) that determines suitable data center for new replica by designing a smart fuzzy inference system with four inputs as centrality, energy, storage usage, and load. In addition, a high-quality knowledge base is designed to describe the fuzzy system of CSO algorithm. To obtain a higher level of security, we partition each …