Cloud data security access with privacy-preserving

Cloud computing is a revolutionary computing paradigm which enables flexible, on-demand and low-cost usage of computing resources. Those advantages are the causes of security and privacy problems, which emerge because the data owned by different users are stored in some cloud servers instead of under their own control. How to protect the data privacy is the most important in cloud computing. In this paper, based on virtual adversary structure, a data security access scheme is proposed to protect sensitive data. The virtual adversary structure is realized by an efficient secret sharing scheme. The scheme has been shown to have reconstruction and perfect properties of the secret sharing. It only performs modular additions and subtractions and every share is replicated in multiple share sets. Based on virtual adversary structure and secret sharing, the scheme also has some advantages: low computational complexity and high recoverability.