Nakano Kazuya, Takeda Masafumi, Suzuki Hiroyuki
Appl Opt. 2017 May 20;56(15):4474-4479. doi: 10.1364/AO.56.004474.
Double random phase encoding (DRPE) is a classical optical symmetric-key encryption method. DRPE prevents the key length from being determined because of its redundancy between encryption and decryption, unlike digital symmetric-key cryptographies. In our study, we numerically analyzed the key length of DRPE based on key-space analysis. We estimated the key length of DRPE by calculating the inverse value of the cumulative probability of the normal distribution that was estimated from samples of DRPE and then discuss security against brute-force attacks.
双随机相位编码（DRPE）是一种经典的光学对称密钥加密方法。与数字对称密钥密码学不同，DRPE由于其加密和解密之间的冗余性，可防止密钥长度被确定。在我们的研究中，我们基于密钥空间分析对DRPE的密钥长度进行了数值分析。我们通过计算从DRPE样本估计的正态分布累积概率的倒数来估计DRPE的密钥长度，然后讨论针对暴力攻击的安全性。
