ANALYSIS OF EFFECTIVE MULTI USER DISTRIBUTION KEY MANAGEMENT SCHEME IN CLOUD DATABASE

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 project demonstrates the feasibility and performance of the proposed solution through a software prototype. The proposed architecture manages five types of information: plain data represent the tenant information; encrypted data are the encrypted version of the plain data, and are stored in the cloud database; plain metadata represent the additional information that is necessary to execute SQL operations on encrypted data; encrypted metadata are the encrypted version of the plain metadata, and are stored in the cloud database; master key is the encryption key of the encrypted metadata, and is known by legitimate clients