Optical hierarchical authentication based on interference and hash function.
Optical hierarchical authentication based on interference and hash function.
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DOI：
10.1364/ao.51.007750
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发表时间：
2012-11
期刊：
影响因子：
1.9
通讯作者：
W. He;Xiang Peng;Xiangfeng Meng;Xiaoli Liu
中科院分区：
文献类型：
--
作者：
W. He;Xiang Peng;Xiangfeng Meng;Xiaoli Liu
提出了一种基于双波束干涉和单向散列函数的分级认证方法。对于这种安全防护系统，只有同时验证用户的“相位密钥”和密码控制的“相位锁”，才能获得访问系统机密资源的权限。此外，该方案不仅可以检查用户的合法性，还可以验证他们的身份级别，从而为他们授予相应的分级访问权限。认证过程简单明了；一个用户的相位密钥和密码控制的锁相预先加载到两个空间光调制器上，两个相干光束被调制，然后在输出平面上相互干涉，从而产生输出图像。通过将输出的图像与数据库中的所有标准认证图像进行比较，系统可以验证用户的身份。然而，系统的设计过程涉及一种迭代修改的相位恢复算法。对于授权用户，首先基于“数字指纹”创建锁相，该“数字指纹”是对预先选择的用户密码进行散列函数的结果。然后，可以通过使用锁相和指定的标准认证图像来确定相应的相位密钥。理论分析和计算机仿真都验证了该方法的有效性。
We propose a method to achieve the purpose of hierarchical authentication on the basis of two beams' interference and the one-way hash function. For this security protection system, only if the "phase key" and the password-controlled "phase lock" of a user are verified simultaneously can one obtain a permission to visit the confidential resources of the system. Moreover, this scheme can not only check the legality of the users but also verify their identity levels so as to grant them corresponding hierarchical access permissions. The authentication process is straightforward; the phase key and the password-controlled phase lock of one user are loading on two spatial light modulators in advance, by which two coherent beams are modulated and then interfere with each other at the output plane leading to an output image. By comparing the output image with all the standard certification images in the database, the system can thus verify the user's identity. However, the system designing process involves an iterative modified phase retrieval algorithm. For an authorized user, a phase lock is first created based on a "digital fingerprint," which is the result of a hash function on a preselected user password. The corresponding phase key can then be determined by use of the phase lock and a designated standard certification image. Theoretical analysis and computer simulations both validate the effectiveness of our method.