Wang Lei, Wu Quanying, Situ Guohai
Opt Express. 2019 Oct 28;27(22):32158-32167. doi: 10.1364/OE.27.032158.
Images can be optically encrypted by random encoding in the phase, the polarization, or even the coherence of a light field. It is important for these optical encryption methods to undergo rigorous cryptanalysis. However, only phase-encoding-based encryption has been rigorously analyzed to date. In this manuscript, we demonstrate that the double random polarization encryption (DRPolE) is vulnerable to chosen-plaintext attack (CPA). We show that the keys can be retrieved if one can choose the polarization states of two plaintext images and collect the corresponding cyphertext images. Our study reveals a serious concern regarding the DRPolE that should be addressed in the design of polarization-based optical encryption methods.
图像可以通过对光场的相位、偏振甚至相干性进行随机编码来实现光学加密。对这些光学加密方法进行严格的密码分析很重要。然而，迄今为止，只有基于相位编码的加密方法得到了严格分析。在本论文中，我们证明了双随机偏振加密（DRPolE）容易受到选择明文攻击（CPA）。我们表明，如果能够选择两个明文图像的偏振态并收集相应的密文图像，就可以检索出密钥。我们的研究揭示了在基于偏振的光学加密方法设计中应解决的关于DRPolE的一个严重问题。
