Research on Multi-Cloud Security Provisioning explores mechanisms to ensure data protection, trust management, and secure operations across multiple cloud service providers operating in a shared or federated environment. As organizations adopt multi-cloud strategies for redundancy, cost optimization, and flexibility, security provisioning becomes more complex due to diverse policies, heterogeneous architectures, and varying service-level agreements. Key research topics include unified identity and access management across clouds, secure data migration and synchronization, and cross-cloud encryption and key management frameworks. Other critical areas involve trust negotiation among clouds, inter-cloud intrusion detection and response systems, and blockchain-based security orchestration for decentralized control. Privacy-preserving service composition, zero trust models for multi-cloud ecosystems, and AI-driven adaptive security provisioning are also emerging trends. Furthermore, policy harmonization, compliance assurance, and automated risk assessment across multi-cloud infrastructures represent vital directions for developing robust, scalable, and interoperable multi-cloud security frameworks.