Accountable Contract Signing Protocol for Secure Data Sharing In Multiuser Untrusted Clouds

Abstract: Recent computing model that has become important is known as cloud computing which has various services like Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS) and Mining as a Service (MaaS). Widely used service among them is the storage service. When a company outsources its data to cloud and the data owners are maintained in the form of groups and members, it is essential to have secure mechanisms in place as the groups are very dynamic. Secure and scalable access to the data by data owners is very important in this context. Every member in a group is able to access his data and he is treated as owner to that data. This member can switch to different group when he moves to other team in future. This way there are instances in which group members move groups and the change dynamics are more. In this scenario it is challenging job to maintain groups and share data in privacy preserving fashion. Recently Recently Liu et al. proposed a scheme for secure multi-owner data sharing. In this paper we implemented an application that simulates the environment where groups and members are dynamically managed with security aspects fulfilled. The empirical results reveal that the application is useful and can be explored to use in real cloud.

Keywords: Cloud computing, multi-owner data sharing, security