This paper proposes a novel authentication and key agreement-based mechanism for efficient data migration in cloud environments. The proposed mechanism employs a dynamic key generation approach to enhance security during data migration, which is crucial in ensuring data privacy and integrity. The proposed mechanism also utilizes an authentication protocol to ensure secure communication between the cloud server and the user during the migration process. The authentication protocol employs a mutual authentication scheme to prevent unauthorized access and ensure the validity of the communication parties. Additionally, the proposed mechanism utilizes a hybrid encryption approach, combining symmetric and asymmetric encryption techniques, to improve the efficiency and security of the data migration process. The hybrid encryption approach enables the efficient transfer of large volumes of data while maintaining the confidentiality of sensitive information. Experimental results demonstrate that the proposed mechanism outperforms existing methods in terms of efficiency and security. Overall, the proposed mechanism provides a robust solution for secure and efficient data migration in cloud environments.