陆军工程大学石家庄校区 电子与光学工程系, 石家庄 050003
针对混合输入输出(HIO)等数值攻击算法攻击联合变换相关器(JTC)加密系统运行时间长、攻击效率低的问题, 设计了一种基于光路迭代的光学唯密文攻击系统。该系统充分利用了光学系统高速并行处理的特点, 通过光束在光学系统中的光学傅里叶变换取代在计算机上的数字傅里叶变换, 显著缩短了攻击算法的运行时间, 有效提高了对JTC加密系统的攻击效率。仿真结果表明, 相较于HIO攻击算法, 在迭代次数相同的条件下, 基于光路迭代的光学唯密文攻击系统有效减少了算法的运行时间, 显著提高了对JTC加密系统的攻击效率。
光学信息安全 联合变换相关器 唯密文攻击 空间光调制器 optical security joint transform correlator ciphertext-only attack spatial light modulator
1 长春理工大学光电工程学院, 吉林 长春 130022
2 中国移动通信集团吉林有限公司网络优化中心, 吉林 长春 130000
针对光学多图像认证方法中,多路复用图像中的串扰噪声,以及不同认证级别下的信息安全问题,提出了一种基于超混沌振幅型掩模和Gyrator变换域下相位信息复用的光学多图像认证方法。利用分数阶超混沌Rabinovich系统构造超混沌随机振幅掩模;基于改进的Gerchberg-Saxton算法对原始图像进行低级或高级编码,利用超混沌掩模作为振幅约束,迭代获得目标图像,并将得到的N个目标图像编码成复合图像;再次通过Gerchberg-Saxton迭代将复合图像转化为两个便于传输的纯相位掩模。实验结果表明:在认证过程中,不同安全级别的用户拥有各自的认证密钥,低级认证过程中可以通过检索图像与原始图像的非线性相关峰值,判断认证图像的正确性,而高级认证过程中则可以获得与原始图像相似度较高的认证图像,峰值信噪比和相关系数分别可达25.2817 dB和0.9844。所提方法对遮挡攻击和噪声攻击具有良好的稳健性,为多幅图像在不同级别下的光学认证提供了新的思路。
图像处理 光学安全及加密 光学图像认证 超混沌 Gyrator变换 相位信息复用
Author Affiliations
Abstract
Shenzhen Key Laboratory of Communication and Information Processing, College of Information Engineering, Shenzhen University, Shenzhen 518060, China
We experimentally demonstrate a 10 Gb/s free-space optical wiretap channel based on a spatial-diversity scheme and optical code division multiple access. In weak and middle turbulence cases, the bit error rate of a legitimate user can be decreased, and physical layer security can be simultaneously enhanced.
060.2605 Free-space optical communication 060.4785 Optical security and encryption Chinese Optics Letters
2019, 17(8): 080604
Author Affiliations
Abstract
1 School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore
2 Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
3 AICFVE of Beijing Film Academy, Beijing 100088, China
We proposed a three-dimensional (3D) image authentication method using binarized phase images in double random phase integral imaging (InI). Two-dimensional (2D) element images obtained from InI are encoded using a double random phase encryption (DRPE) algorithm. Only part of the phase information is used in the proposed method rather than using all of the amplitude and phase information, which can make the final data sparse and beneficial to data compression, storage, and transmission. Experimental results verified the method and successfully proved the developed 3D authentication process using a nonlinear cross correlation method.
100.4998 Pattern recognition, optical security and encryption 110.6880 Three-dimensional image acquisition Chinese Optics Letters
2019, 17(5): 051002
1 军械工程学院电子与光学工程系，河北 石家庄 050003
2 中国国防科技信息中心，北京 100138
3 总装备部重庆军代局驻北碚军代室，重庆 400700
为提高光学认证技术的安全性及实用性，提出了基于三维空间正交偏振态复用的光学多级安全认证方法。用所设计的多衍射平面多信号窗口相位恢复算法，生成两个相位模板，使由认证图像分割得到的子块图像分布于其三维菲涅耳衍射场的特定位置。一个相位模板作为系统锁，另一个作为认证密钥。用正交偏振光分别照明两相位模板，实现了三维空间衍射场内不同位置强度分布和偏振态分布的控制。只有同时具备认证密钥和三维空间正交偏振态映射密钥，才能恢复认证图像，模拟及实验结果与认证图像的相关系数分别为0.93 和0.79，表明该系统结构紧凑、安全等级高,可以实现分级认证。
傅里叶光学 光学数据处理 光学安全认证 相位恢复算法 正交偏振态复用
Author Affiliations
Abstract
Department of Electrical, Electronic and Control Engineering, Hankyong National University, Anseong 456-749, Korea
We propose a security-enhanced double-random phase encryption (DRPE) scheme using orthogonally encoded image and electronically synthesized key data to cope with the security problem of DRPE technique caused by fixed double-random phase masks for encryption. In the proposed scheme, we adopt the electronically synthesized key to frequently update the phase mask using a spatial light modulator, and also employ the orthogonal encoding technique to encode the image and electronically synthesized key data, which can enhance the security of both data. We provide detailed procedures for encryption and decryption of the proposed scheme, and provide the simulation results to show the encryption effects of the proposed scheme.
060.4785 Optical security and encryption 200.4560 Optical data processing Chinese Optics Letters
2015, 13(1): 010603
1 大连理工大学信息与通信工程学院 光通信与信息光子技术实验室， 辽宁 大连 116023
2 国家网河南省电力公司信息通信公司， 河南 郑州 450052
基于三只参数相近的半导体激光器及单一光纤信道仿真并实验实现了全双工混沌激光保密通信。当两端发送的数据速率均为1.25 Gb/s时，在一条标准单模光纤中全双工保密传输距离达25 km，正反向恢复数据的Q因子分别为2.1和2.0。该方案大幅度节省了光纤链路和设备、降低了实现成本，提高了数据传输的保密安全性。
光通信 混沌光 光学安全与加密 半导体激光器 光学学报
2014, 34(s2): s206010
Author Affiliations
Abstract
In holographic encryption, double random-phase encoding in the Fresnel domain (DRPEiFD) is a prevalent encryption method because it is lensless and secure. However, noises bring adverse effects during decryption. In this letter, we introduce quick-response (QR) coding during encryption to resist noises. We transform the original information into a QR code and then encrypt the code as a hologram through DRPEiFD. To retrieve the input, we decrypt the hologram in the opposite manner to the encryption and subsequently obtain a QR code with noises. By scanning this code with proper applications in smartphones, we can obtain a noise-free retrieval. Numerical experiments and images scanned by a smartphone are shown to validate our proposed method.
060.4785 Optical security and encryption 070.4560 Data processing by optical means 090.1760 Computer holography 100.4998 Pattern recognition, optical security and encryption Chinese Optics Letters
2014, 12(1): 010601
Author Affiliations
Abstract
We propose a novel technique to increase the confidentiality of an optical code division multiple access (OCDMA) system. A virtual user technique is analyzed and implemented to make an OCDMA system secure. Using this technique, an eavesdropper will never find an isolated authorized user's signal. When authorized users and virtual users transmit data synchronously and asynchronously, network security increases by 25% and 37.5%, respectively.
060.2330 Fiber optics communications 060.4510 Optical communications 060.4785 Optical security and encryption Chinese Optics Letters
2011, 9(12): 120602
华南师范大学物理与电信工程学院,广州,510631
提出了一种基于双随机相位的图像实值编码方法,该方法可应用于光学图像加密.要编码的纯相位图像分别在空间域和频域加入随机相位掩膜,其中在频域将编码范围扩大4倍,经过光学系统的变换,将生成的图像取实部作为编码图像.实值编码的图像利用与编码过程类似的方法进行解码,可以准确地重建原图像.该编译码方法简单,编码图像是一个近似随机噪声的实值图像,便于数字图像的传输与输出.
光学加密 图像 双随机相位编码 实值编码 Optical security Image Double random phase Real-value encryption
