Multi-owner Architecture System Using Visual Cryptography and Watermarking for Secure Ownership in Cloud Environment

Cloud computing is the best way for storing and computing data over an internet. Data can be shared in the form of texts, images, audio, and video. Sharing data securely over internet is a key issue. Cloud computing faces serious issues like security, integrity, and confidentiality of data. The most popular existing techniques for achieving data security faced conflicts like generation of large keys, the heavy computation of large keys, and collision attack of malicious users and also it meant for single owner. To overcome the limitations of existing techniques, we proposed a scheme and implemented image encryption and decryption using symmetric key. In the proposed system, we aim to improve security which implement three algorithms namely, visual cryptography (VC), AES (Advanced Encryption Standards), and watermarking. In this paper, the secret image is divided into multiple shares according to the number of users by visual cryptography, later AES is used. For more authentication and copyright protection, watermarking is used. In the obtained result, security is improved and also a key size is decreased which leads to data sharing among multiple authenticated owners securely without any conflict and original image is regenerated by combining all the shares.