Multimedia data encryption based on discrete dyadic transformation
S. N. Prajwalasimha, Usha Surendra · 2017
In this paper, confusion and diffusion based private key encryption algorithm is proposed. In the multimedia data neighboring pixels are strongly correlated with each other. The proposed encryption algorithm is the combination of both confusion and diffusion techniques. In the confusion algorithm, discrete dyadic transformation is used to shuffle the pixel positions and in the diffusion algorithm, modified Gingerbreadman sequence generator is used to alter the value of each pixel. The key length used is 128 bits. Each digit in the secret key is subjected for initial permutation and used along with diffusion algorithm for the key sequence generation.