Abstract

Optical information processing technology is characterized by high speed and parallelism, and the light features short wavelength and large information capacity; At the same time, it has various attributes including amplitude, phase, wavelength and polarization, and is a carrier of multi-dimensional information. Therefore, optical encryption is of great significance in the field of information security transmission, and is widely used in the field of image encryption. For multi-image encryption, this paper proposes a multi-image encryption algorithm based on a modified Gerchberg–Saxton algorithm (MGSA) in the Fresnel-transform domain and computational ghost imaging. First, MGSA is used to realize “one code, one key”; Second, phase function superposition and normalization are used to reduce the amount of ciphertext transmission; Finally, computational ghost imaging is used to improve the security of the whole encryption system. This method can encrypt multiple images simultaneously with high efficiency, simple calculation, safety and reliability, and less data transmission. The encryption effect of the method is evaluated by using correlation coefficient and structural similarity, and the effectiveness and security of the method are verified by simulation experiments.

Multiple-image encryption and multiplexing using a modified Gerchberg-Saxton algorithm and phase modulation in Fresnel-transform domain

Hone-Ene Hwang, Hsuan T. Chang, and Wen-Nung Lie
Opt. Lett. 34(24) 3917-3919 (2009)

Single-channel color image encryption using a modified Gerchberg–Saxton algorithm and mutual encoding in the Fresnel domain

Xiaopeng Deng and Daomu Zhao
Appl. Opt. 50(31) 6019-6025 (2011)

Fresnel domain nonlinear optical image encryption scheme based on Gerchberg–Saxton phase-retrieval algorithm

Sudheesh K. Rajput and Naveen K. Nishchal
Appl. Opt. 53(3) 418-425 (2014)

Wavelength multiplexing multiple-image encryption using cascaded phase-only masks in the Fresnel transform domain

Hsuan T. Chang, Hone-Ene Hwang, Cheng-Ling Lee, and Mn-Ta Lee
Appl. Opt. 50(5) 710-716 (2011)

Fast double-phase retrieval in Fresnel domain using modified Gerchberg-Saxton algorithm for lensless optical security systems

Hone-Ene Hwang, Hsuan T. Chang, and Wen-Nung Lie
Opt. Express 17(16) 13700-13710 (2009)