This work reports an optical double-image crosstalk free encryption scheme that employs equal modulus decomposition and random masks. For the encryption, two plaintexts by a random amplitude mask and a random phase mask have been encrypted into a single ciphertext mask and two private key masks. Owing to the two random masks introduced, the functional relation between the plaintext pair and the ciphertext indirectly cause the paucity of constraints employed for the specific attack. Unlike the traditional phase-truncation-based techniques, this scheme is immune to the information leakage and different types of attacks. Furthermore, the three different diffraction distances and the illuminating wavelength also function as four additional keys to significantly reinforce the security. Simulation results demonstrate the feasibility and validity of the proposal.

这项工作报告了一种采用等模分解和随机掩模的光学双图像无串扰加密方案。对于加密，通过随机幅度掩码和随机相位掩码的两个明文已被加密为单个密文掩码和两个私钥掩码。由于引入了两个随机掩码，明文对和密文之间的函数关系间接导致了特定攻击所采用的约束的缺乏。与传统的基于相位截断的技术不同，该方案不受信息泄漏和不同类型的攻击的影响。此外，三种不同的衍射距离和照明波长还充当四个附加密钥，显着增强了安全性。仿真结果验证了该方案的可行性和有效性。