Color image encryption using double random phase encoding

Secured Lossy Color Image Compression Using Permutation and Predictions

“…The 8 bit error sequence is converted into 7 bit data sequence. The negative sign information is extracted from the LSB of the 7 bit data sequence using the Equation 6.…”

“…Those schemes are classified into the following three types namely Position Permutation, Value Transformation and Visual Transformation [6].…”

Speed Image Encryption Scheme using Dynamic Galois Field GF(P) Matrices

“…concentrate on changing two-dimensional data into onedimensional data and then applying encryption on it. [3] But this technique is less efficient to encrypt and decrypt images. Because the most important factor in the encryption process is time of this reason, such a primitive style of encryption it is not preferred for digital images.…”

“…Step 2. Generate GF(p) masks and inverses for sizes [3][4][5][6][7][8][9][10][11][12] using Gauss Jordan elimination Method…”

Image Encryption Using Differential Evolution Approach in Frequency Domain

“…Color Image Encryption Using Double Random Phase Encoding S. Zhang and M. A. Karim [15] have proposed a new method to encrypt color images using existing optical encryption systems for gray-scale images. The color images are converted to their indexed image formats before they are encoded.…”