Optical encryption using a joint transform correlator architecture

TLDR

The paper proposes an optical double‑random‑phase encryption method based on a joint transform correlator architecture. Encryption is achieved by recording the joint power spectrum of the image and key codes as the encrypted data. The method eliminates the need for a conjugate key, using the same key for encryption and decryption, and is validated by simulations and photorefractive‑crystal experiments. © 2000 Society of Photo‑Optical Instrumentation Engineers (S0091‑3286(00)03508‑X).

Abstract

An optical double random-phase encryption method using a joint transform correlator architecture is proposed. In this method, the joint power spectrum of the image to be encrypted and the key codes is recorded as the encrypted data. Unlike the case with classical double random-phase encryption, the same key code is used to both encrypt and decrypt the data, and the conjugate key is not required. Computer simulations and optical experimental results using a photorefractive- crystal-based processor are presented. © 2000 Society of Photo-Optical Instru- mentation Engineers. (S0091-3286(00)03508-X)