1. G. Unnikrishnan, J. Joseph, and K. Singh, ‘‘Optical encryption by double-random phase encryption in the fractional Fourier domain,’’ Opt. Lett. 25, 887–889 (2000). doi 10.1364/OL.25.000887
2. C. Lin, X. Shen, and B. Li, ‘‘Four-dimensional key design in amplitude, phase, polarization and distance for optical encryption based on polarization digital holography and QR code,’’ Opt. Express 22, 20727–20739 (2014). doi 10.1364/OE.22.020727
3. S. Liansheng, C. Yin, L. Bing, T. Ailing, and A. K. Asundi, ‘‘Optical image encryption via high-quality computational ghost imaging using iterative phase retrieval,’’ Laser Phys. Lett. 15, 075204 (2018). doi 10.1088/1612-202X/aac002
4. Z. Wang1, X. Lv, H. Wang, C. Hou, Q. Gong, and Y. Qin, ‘‘Hierarchical multiple binary image encryption based on a chaos and phase retrieval algorithm in the Fresnel domain,’’ Laser Phys. Lett. 13, 036201 (2016). doi 10.1088/1612-2011/13/3/036201
5. V. V. Krasnov, S. N. Starikov, R. S. Starikov, and P. A. Cheremkhin, ‘‘Optical encryption of arrays of binary digits in spatially incoherent light,’’ Russ. Phys. J. 58, 1394–1401 (2016). doi 10.1007/s11182-016-0661-7