Image encryption using wavelet transform over finite field
Vivek P Khalane, Umesh S. Bhadade · 2017
This paper introduces the cryptosystem based on the theory of wavelet decomposition defined over Galois field. The encryption-decryption process is executed by the analysis and synthesis filter banks of wavelet transform. The cryptosys temoperated on block-cipher mode because data blocks serially encrypted by dividing large block into several small blocks using linear circular convolution. The input image is fed to decomposition block at different level and obtained the correlation coefficient between decomposed image and original image for each level. The comparative results of finite field and wavelet transformare obtained which indicates that finite field operation give better result. This method claims the benefits for image processing applications such as medical imaging, industries and military aspects..