Research on Anonymous Data Sharing in Cloud Computing focuses on enabling secure and privacy-preserving data exchange while maintaining accountability and traceability. Modern approaches employ cryptographic techniques such as homomorphic encryption, elliptic curve-based schemes, and blockchain-assisted frameworks to ensure that sensitive information can be shared without revealing user identities. Resource-efficient methods have been developed for IoT and mobile cloud environments to support anonymous group data sharing with minimal computational overhead. Overall, these strategies aim to balance privacy, security, and functionality, enabling trustworthy and confidential data sharing across dynamic, multi-tenant cloud infrastructures.