Achieving Privacy Assured Outsourcing of Data in Cloud Using Optimalvisual Cryptography

Security has emerged as the most feared aspect of cloud computing and a major hindrance for the customers. In existing system for establishing secure and privacy-assured service outsourcing in cloud computing which uses Linear programming and compressed sensing techniques to transform images, which aims to take security, complexity, and efficiency into consideration from the very beginning of the service flow. But it makes more complexity because the data is sent in its raw form to one cloud. The cryptography schemes are computationally more complex. In order to enhance the security and reduce the complexity, to use data obfuscation through a novel visual cryptography. A conventional threshold (k out of n) visual secret sharing scheme encodes one secret image into transparencies (called shares) such that any group of transparencies reveals when they are superimposed, while that of less than ones cannot. In the proposed work, novel multiple secret visual cryptographic schemes are used to encode the secret s images into n shares. Convert the data into basic images and send the encrypted form of image by using multiple visual cryptographic schemes. (k, n, s) -MVCS, in which the superimposition of each group of shares reveals the first, second, s secret, respectively where s=n-k+1. The proposed system also considers visual cryptography without pixel expansion. A new scheme for visual cryptography is developed and configured for the cloud for storing and retrieving textual data. Testing the system with query execution on a cloud database indicates full accuracy in record retrievals with negligible false positives. In addition, the system is resilient to attacks from within and outside the cloud. An experimental result shows that the Complexity analysis, Security analysis, the system is tested against artificial intelligence/machine learning based attacks. Keywords— Security and privacy, Cloud computing, visual secret sharing, multiple secrets