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Optical image security using Stokes polarimetry of spatially variant polarized beam

机译:光学图像安全使用空间变体极化光束的Stokes Polarimetry

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摘要

We propose a novel security scheme that uses vector beam characterized by the spatially variant polarization distribution. A vector beam is so generated that its helical components carry tailored phases corresponding to the image/images that is/are to be encrypted. The tailoring of phase has been done by employing the modified Gerchberg-Saxton algorithm for phase retrieval. Stokes parameters for the final vector beam is evaluated and is used to construct the ciphertext and one of the keys. The advantage of the proposed scheme is that it generates real ciphertext and keys which are easier to transmit and store than complex quantities. Moreover, the known plaintext attack is not applicable to this system. As a proof-of-concept, simulation results have been presented for securing single and double gray-scale images.
机译:我们提出了一种新的安全方案,其使用具有空间变体偏振分布的传染料光束。 因此,因此产生了矢量光束,其螺旋分量携带与要加密的图像/图像对应的定制相位。 通过采用修改的Gerchberg-Saxton算法进行阶段检索来完成阶段的剪裁。 评估最终矢量波束的Stokes参数,并用于构造密文和其中一个键。 所提出的方案的优点是它生成了更容易发送和存储而不是复杂量的真正密文和键。 此外,已知的明文攻击不适用于该系统。 作为概念验证,已经提出了用于保护单灰度和双灰度图像的仿真结果。

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