Hybrid cryptographic approach to enhance the mode of key management system in cloud environment.

Cloud computing has gained great attention among the individual user and the organization. Transitioning to the cloud platform is not simple as it involves various cybersecurity and operational issues. Due to a large amount of data storage in the cloud, ensuring the security of the data outsourced in the cloud is highly important. A Key Management System (KMS) is a secure data protection method that is commonly used in e-healthcare information systems, information security (confidentiality, integrity, authenticity), large-scale organizations, architecture security, sensor security, identity management, access control (privacy preservation), identity proofing (authentication), and legal issues. Because this approach allows the secret key information to be exchanged safely, the security level may be guaranteed to be high. Using a random prime number, a master secret key, and a parameter value, one can generate a secure key that is difficult for hackers to break. Secure data transfer with exact and consistent authentication is the goal of this new approach. This research focuses on the development of secure secret key creation and the improvement in secure key sharing. To generate the key (in the form of a QR code), we have used an asymmetric Elliptic Curve Cryptography (ECC) method, whereas encryption and decryption of data have been done by a hybrid of Advanced Encryption Standard (AES) and ECC cryptography. The hybrid ECC-AES model was found to take less amount of time than the AES model and other existing models. Current algorithms have certain security issues, such as vulnerability to plaintext attacks, brute force attacks, side-channel attacks, and computational complexity. The proposed algorithm has been able to overcome the issue of key exchange that plagues AES, simpler than ECC and more reliable than AES. As a result, KMS has been designed to provide high levels of security for healthcare information. We have proposed a Hybrid Cryptographic Approach to enhance the Mode of Key Management System (HCA-KMS) in a Cloud Environment based on authenticated encryption with AES and ECC. The proposed algorithm has been compared to existing methods concerning confidentiality, integrity, time complexity, storage overhead, resource utilization, security, and log time to demonstrate its efficacy. The proposed HCA-KMS has time complexity, encryption time (O (n)), and decryption time (O (logn)). [ABSTRACT FROM AUTHOR]