Double Random Phase Encryption Based Orthogonal Encoding Technique for Color Images

Abstract

In this paper, we propose a simple Double random phase encryption (DRPE) -based orthogonal encoding technique for color image encryption. In the proposed orthogonal encoding technique, a color image is decomposed into red, green, and blue components before encryption, and the three components are independently encrypted with DRPE using the same key in order to decrease the complexity of encryption and decryption. Then, the encrypted data are encoded with a Hadamard matrix that has the orthogonal property. The purpose of the proposed orthogonal encoding technique is to improve the security of DRPE using the same key at the cost of a little complexity. The proposed orthogonal encoder consists of simple linear operations, so that it is easy to implement. We also provide the simulation results in order to show the effects of the proposed orthogonal encoding technique.

Double Random Phase Encryption using Orthogonal Encoding for Multiple-Image Transmission

“…To improve the security of DRPE, fractional Fourier transform has been adopted in DRPE systems [25], but it requires much more information in the keys for encryption and decryption. An increase in the key information can make the DRPE systems more complicated, so DRPE using orthogonal encoding has been proposed for single-image transmission [26]. The orthogonal encoding technique for single-image transmission employs only simple, linear operations based on the Hadamard matrix of order 2 with the orthogonality property [27].…”

Optical Encryption Scheme with Multiple Users Based on Computational Ghost Imaging and Orthogonal Modulation

“…If the ciphertext of the multiple secret images is shared for all authorized users but anyone of them can only extract his/her own secret image with his/her own key, the burden of transmitting huge amounts of secret data borne by the channel will be reduced. In recent years, the orthogonal codes are utilized to design the keys for different authorized users to avoid the secret images being extracted mutually [36][37][38]. In this paper, we combine the CGI and the orthogonal modulation to achieve a secure and convenient scheme for multiuser application.…”

Information Authentication of Three-Dimensional Photon Counting Double Random Phase Encryption Using Nonlinear Maximum Average Correlation Height Filter

“…Recently, data encryption techniques have been widely researched [1][2][3][4][5][6][7][8][9][10][11]. Double random phase encryption (DRPE) that is one optical encryption technique has many advantages; easy implementation and high encryption speed [5].…”