In the digital world, the users stores digital data on clouds and according to requirement access the
data. So, authentication and confidentially is a big concern. To resolve these attacks cryptography
and steganography algorithms are used. In this paper, an overview of cloud, its architecture, and
attacks defined. Also, a literature survey is done and based on survey a multi-layer security
algorithm is designed by hybrid the cryptography and steganography algorithm. Moreover, the
performance analysis is done on the basis of correlation factor, MSE and PSNR values.
Keywords: Cloud Attacks, Security, MSE, PSNR, Cryptography, Steganography.
Keywords: Cloud Attacks, Security, MSE, PSNR, Cryptography, Steganography.