A threshold secure data sharing scheme for federated clouds

TL;DR

This paper proposes a zero-knowledge data sharing scheme for federated clouds that ensures data security, integrity, and availability by leveraging the difficulty of the Discrete Logarithm problem, suitable for sensitive applications.

Contribution

It introduces a novel zero-knowledge based data sharing scheme controlled by a Trusted Cloud Authority for federated clouds, enhancing security and availability.

Findings

Provides data integrity during transit

Ensures data availability despite host provider failures

Secures data sharing using Discrete Logarithm problem complexity

Abstract

Cloud computing allows users to view computing in a new direction, as it uses the existing technologies to provide better IT services at low-cost. To offer high QOS to customers according SLA, cloud services broker or cloud service provider uses individual cloud providers that work collaboratively to form a federation of clouds. It is required in applications like Real-time online interactive applications, weather research and forecasting etc., in which the data and applications are complex and distributed. In these applications secret data should be shared, so secure data sharing mechanism is required in Federated clouds to reduce the risk of data intrusion, the loss of service availability and to ensure data integrity. So In this paper we have proposed zero knowledge data sharing scheme where Trusted Cloud Authority (TCA) will control federated clouds for data sharing where the secret to be exchanged for computation is encrypted and retrieved by individual cloud at the end. Our scheme is based on the difficulty of solving the Discrete Logarithm problem (DLOG) in a finite abelian group of large prime order which is NP-Hard. So our proposed scheme provides data integrity in transit, data availability when one of host providers are not available during the computation.