Abstract: Database is a service paradigm poses several research challenges in terms of security and cost evaluation from a tenant‘s point of view. The cloud database as a service is a novel paradigm that can support several Internet-based applications, but its adoption requires the solution of information confidentiality problems. A novel architecture for adaptive encryption of public cloud databases that offers an interesting alternative to the tradeoff between the required data confidentiality level and the flexibility of the cloud database structures at design time. This paper proposes a novel architecture for adaptive encryption of public cloud databases that offers a proxy-free alternative to the system. The paper demonstrates the feasibility and performance of the proposed solution through a software prototype. Mobile cloud computing provides a novel ecommerce mode for organizations without any upfront investment. Since cloud computing uses distributed resources in open environment, it is important to provide secure keys to share the data for developing cloud computing applications. To ensure a correctness of users’ data in the cloud, we propose an effective and secure distributed model including a Self-Proxy Server (SPS) with self-created algorithm. The model resolves a communication bottleneck due to re-encryption of a shared data in the cloud whenever users are revoked. It offers to reduce security risks and protect their resources because a distributed SPS dynamically interacts with Key Manager (KM) when the mobile users take on cloud services. To avoid this type of the situation fuzzy authorization uses the technique if the entered password partially matches the user can get the video that is the fake video. After that hacker stop retrying the username and the password. The original data is taken after real password is given by the real user.

Keywords: Cloud Database, Adaptive Encryption, SQL operations, Metadata, Distributed SQL operation, Multi key Distribution, Self Proxy Server.