Design of Hybrid Authentication Protocol for High Secure Applications in Cloud Environments Abstract: Privacy and security is more important in cloud computing because huge amount of data is being transferred due to which risk of attacking the data is increasing day by day. Cryptography is a method of storing and transmitting the data in an unintelligible manner so that only the intended recipient or receiver can read and process it. In cryptography, the original message, which is called as the plaintext can be converted to an unintelligible form called cipher text. The ability to securely delete sensitive data from storage is becoming more important. In this method some important security services including authentication Protocol is provided in cloud computing. The entire architecture is divided into four modules they are security server, cloud database, hybrid authentication protocol and communication. To provide efficient security hybrid authentication protocol is utilized. In hybrid authentication protocol initially data will be registered and to this data privacy is provided using privacy module. Now to the obtained data security key is provided. After that data base functions are performed. Security server will provide security for the transmitter and received data. Cloud data base will store the data. From results it can observe that hybrid authentication protocol will improve the performance, security, scalability and reduces the errors, Delay and attacks which are obtaining from unauthorized users. Key Words: Cloud data base, Security server, hybrid authentication protocol, Cloud computing, Cryptography, Delay. I.INTRODUCTION In internet computing resources are delivered by the Cloud computing. Most of the applications are adopted by the Cloud computing network and becomes a more persistent system [1]. The main reasons for adopting cloud computing are social network data exponential growth, modern data centers, sudden increment in computing data storage and power. Some of them are having low utilization and high costs so these to be reduced by the designing of cost-effective and reliable cloud-based systems. Internet based IT services are modeled and the current consumption supplement by the new way of Cloud computing. Regular virtualization and dynamically scalable are provided as a service [2]. Internet providers are offering many online services and these are benefit for the users when it are used. Consequently the resources are required to be saved in computing and management, data storage. Specific services are provided by the service providers to offering client software and hardware at lower cost. Huge amount of data is also stored on remote servers because computing resources and storage have aggregating trend. Computing resources (hardware and software) are available in the remote locations also, and these used by the Cloud computing for accessing the entire network. In future expanding techniques are developed for reshaping the information technology processes with cloud computing. Most of the companies are uses this cloud computing technology to share cloud data because of its more advantages as scalability, flexibility and cost-effectiveness. Cloud services are subscribed by the organization in the conventional cloud application in order to share the documents or information between staff in the cloud. Set of keywords are describing every file and staff or authorized users are having the authority to retrieve the file from cloud with certain keywords by querying the cloud. Because of its adaptability and simplification, the retrieval of information is widely uses the Vector space model. Boolean model based Information Sai Srinivas Vellela, Research Scholar, Department of Computer Science and Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, Tamil Nadu, India. sais1916@gmail.com Dr.R. Balamanigandan, Associate Professor, Department of Artificial Intelligence, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, Tamil Nadu, India. balamanigandanr.sse@saveetha.com Proceedings of the International Conference on Automation, Computing and Renewable Systems (ICACRS 2022) DVD Part Number: CFP22CB5-DVD: ISBN: 978-1-6654-6083-5 978-1-6654-6084-2/22/$31.00 ©2022 IEEE 408