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中文摘要：
光学加密机制的研究近来引起了人们的重视。针对光学加密参数对密文安全性的影响问题,本文研究了加密参数与密文的影响关系,为虚拟光学加密系统设计提供安全性理论基础。论文给出了系统的实现算法,设计实现了加密仿真系统,然后对二维码进行了仿真实验与分析,验证了算法的正确性,从衍射距离、光波波长、随机模板、透镜焦距等参数对加密系统的安全性影响进行了仿真讨论,仿真结果表明光波波长对加密系统的安全影响最大,同时参数对安全性的影响存在非线性关系。论文最后讨论了可进一步研究的问题。
英文摘要：
In past few years, optical encryption attracts much attention. Aiming at investigating the influence of parameters used in optical encryption on security and providing theoretical support, this paper addresses relation between the parameters and security. A simulating system is designed and developed. Then, it gives some simulation and analysis of a two-dimensional code identity and evaluates the correctness of the algorithms. It also discusses security influence of parameters in the encryption system, such as diffraction distance, wavelength, random template, and focus length. Simulation results show that the wavelength has more influences on security than other parameters do, and that there exist a nonlinear relation between the parameters and security. Finally, it gives some topics for further research.
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