Centralized Database Security in Cloud

Data Security and Access Control is an exigent work in the environment of Cloud Computing. The users upload the personal and classified data over the cloud. Security is mandatory for such type of outsourced data, so that users are confident while processing their private and confidential data. Modern technology suffers from computational problem of keys and there exchange. This paper emphasizes the different problems and issues that arise while using cloud services such as key generation, data security and authentication. The paper addresses these problems using access control technique which ensures that only the valid users can access there data. It proposes a RSA Key Exchange Protocol between cloud service provider and the user for secretly sharing a symmetric key for the secure data access that solves the problem of key distribution and management. The Authentication will be done using Two Factor Authentication Technique with the help of key generated using TORDES algorithm. The proposed work done using Cloud is highly efficient and secure in the existing security models.