Secure holographic memory by two-wave encryption method with a photorefractive crystal
Secure holographic memory by two-wave encryption method with a photorefractive crystal
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通过光折变晶体的两波加密方法确保全息存储器的安全
DOI：
10.1080/09500340601022565
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
T. Sano
中科院分区：
文献类型：
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作者：
A. Okamoto;Akifumi Mita;H. Funakoshi;K. Moritake;T. Sano
我们提出了一种新的全光加密技术，即两波加密方法，并讨论了使用该技术的安全性和全息存储。与 DRPE 方法不同，该技术的特点是能够降低未经授权的内存访问的输出强度，以及输出记录的白噪声图像的特性。因此，输出强度的监控实现了对未经授权的访问的轻松检测。根据我们的数值模拟，可以发现输出强度存在特别显着的差异，使用未授权访问的密钥和兼容密钥之间的相关系数为20%或更低，以发现未授权访问的检测灵敏度。通过增加密钥长度可以很容易地提高鲁棒性，并且在识别密钥长度约为 32×32 的随机生成密钥时，即使密钥长度太小，观察到的概率为 10−6 或更低。实验表明，使用兼容密钥可以再现清晰的原始图像，但未经授权的基于密钥的再现会将输出强度降低至大约 1/20。
We propose a new all-optical encryption technique, which is a two-wave encryption method, and discuss security and holographic memory using this technique. Unlike the DRPE method, this technique is characterized by its ability to reduce output intensity for unauthorized memory access, along with the property to output a recorded white-noise image. Thus, the monitoring of output intensity achieves easy detection of unauthorized access. According to our numerical simulation, a particularly significant difference can be found in output intensity, with a correlation coefficient of 20% or under between a key using unauthorized access and a compatible key to find detection sensitivity of unauthorized access. Robustness can be readily improved by increasing key length, and the probability was observed to be 10−6 or under on identifying a randomly generated key with a key length of about 32× 32 for the compatible key, even though the key length is too small. It is shown experimentally that the use of a compatible key reproduced a clear original image, but unauthorized key-based reproduction reduced output strength to approximately 1/20.