Latest research in Distributed Authentication and Authorization in Cloud Computing focuses on designing scalable, secure, and efficient mechanisms to verify user identities and manage access across multi-tenant cloud environments. Studies emphasize the integration of distributed ledger technologies, blockchain, and cryptographic protocols to enhance trust, prevent unauthorized access, and provide tamper-proof audit trails. Research also explores lightweight and federated authentication frameworks that support dynamic resource allocation, cross-cloud interoperability, and minimal latency, while ensuring compliance with security standards. Additionally, adaptive access control mechanisms combined with real-time monitoring and anomaly detection improve the reliability and resilience of cloud services, addressing challenges posed by large-scale, heterogeneous, and distributed cloud infrastructures.