Asymmetric optical encryption technique implementing spatially incoherent illumination

2018 ◽  
Author(s):  
Vitaly V. Krasnov ◽  
Pavel A. Cheremkhin ◽  
Nikolay N. Evtikhiev ◽  
Ekaterina D. Minaeva ◽  
Vladislav G. Rodin ◽  
...  
Keyword(s):  
Optical Encryption

scholarly journals Optical coherence encryption with structured random light

PhotoniX ◽  
2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Deming Peng ◽  
Zhaofeng Huang ◽  
Yonglei Liu ◽  
Yahong Chen ◽  
Fei Wang ◽  
...  
Keyword(s):  
Fractional Fourier Transform ◽  
Spatial Coherence ◽  
Second Order ◽  
Statistical Characteristics ◽  
Interference Effects ◽  
Complex Environments ◽  
Optical Encryption ◽  
Light Matter Interaction ◽  
Encryption Method ◽  
Promising Avenue

AbstractInformation encryption with optical technologies has become increasingly important due to remarkable multidimensional capabilities of light fields. However, the optical encryption protocols proposed to date have been primarily based on the first-order field characteristics, which are strongly affected by interference effects and make the systems become quite unstable during light–matter interaction. Here, we introduce an alternative optical encryption protocol whereby the information is encoded into the second-order spatial coherence distribution of a structured random light beam via a generalized van Cittert–Zernike theorem. We show that the proposed approach has two key advantages over its conventional counterparts. First, the complexity of measuring the spatial coherence distribution of light enhances the encryption protocol security. Second, the relative insensitivity of the second-order statistical characteristics of light to environmental noise makes the protocol robust against the environmental fluctuations, e.g, the atmospheric turbulence. We carry out experiments to demonstrate the feasibility of the coherence-based encryption method with the aid of a fractional Fourier transform. Our results open up a promising avenue for further research into optical encryption in complex environments.

scholarly journals Optical Encryption Based on Computer Generated Holograms in Photopolymer

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1358
Author(s):  
Taihui Wu ◽  
Jianshe Ma ◽  
Chengchen Wang ◽  
Haibei Wang ◽  
Liangcai Cao ◽  
...  
Keyword(s):  
High Speed ◽  
Three Dimensional ◽  
Angular Spectrum ◽  
Quick Response ◽  
Response Code ◽  
Optical Encryption ◽  
Large Size ◽  
Quick Response Code ◽  
Computer Generated Holograms ◽  
Encryption Method

An optical encryption method based on computer generated holograms printing of photopolymer is presented. Fraunhofer diffraction is performed based on the Gerchberg-Saxton algorithm, and a hologram of the Advanced Encryption Standard encrypted Quick Response code is generated to record the ciphertext. The holograms of the key and the three-dimensional image are generated by the angular spectrum diffraction algorithm. The experimental results show that large-size encrypted Quick Response (QR) code and miniature keys can be printed in photopolymers, which has good application prospects in optical encryption. This method has the advantages of high-density storage, high speed, large fault tolerance, and anti-peeping.

A phase-based optical encryption system with polarisation encoding

2000 ◽  
Vol 173 (1-6) ◽  
pp. 177-183 ◽  
Author(s):  
Paul C Mogensen ◽  
Jesper Glückstad
Keyword(s):  
Optical Encryption

Multiplexing in optical encryption by using an aperture system and a rotating sandwich random phase diffuser in the Fourier plane

2008 ◽  
Vol 46 (3) ◽  
pp. 243-251 ◽  
Author(s):  
Madan Singh ◽  
Arvind Kumar ◽  
Kehar Singh
Keyword(s):  
Random Phase ◽  
Fourier Plane ◽  
Optical Encryption

A security-enhanced joint transform correlator optical encryption system with cropping operation

Optik ◽  
2021 ◽  
pp. 167654
Author(s):  
Qi Chen ◽  
Xueju Shen ◽  
Yue Cheng ◽  
Chao Lin ◽  
Yunfeng Liu ◽  
...  
Keyword(s):  
Joint Transform Correlator ◽  
Optical Encryption

Inkjet-Printed Quantum Dot Fluorescent Security Labels with Triple-Level Optical Encryption

2021 ◽  
Author(s):  
Xin Zheng ◽  
Yangbin Zhu ◽  
Yang Liu ◽  
Linpeng Zhou ◽  
Zhongwei Xu ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Optical Encryption

Optical encryption using CCRM camera

2021 ◽  
Author(s):  
Amir Matin ◽  
Xu Wang
Keyword(s):  
Optical Encryption
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