Optical image encryption using interferometry-basedphase masks
Jong‐Yun Kim, Se-Joon Park, Cheol-Su Kim, Jang-Geun Bae, Soo–Joong Kim · Electronics Letters · 2000
A new and simple image encryption scheme and optical decoding technique are presented based on the principle of interference. An original image is encoded into two phase-valued images. The interference image between the two images produces a binary image, which has a two-level intensity value. The performance of the proposed technique is evaluated using computer simulations and optical experiments.