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Journal of Modern Optics Volume 62, 2015 - Issue 2
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Research Articles

Asymmetric encryption method in 4f system based on interference

Sixing XiKey Laboratory of Optical Information Science and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin, ChinaView further author information
,
Xiaolei WangKey Laboratory of Optical Information Science and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin, ChinaCorrespondence[email protected]
View further author information
,
Lipei SongKey Laboratory of Optical Information Science and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin, ChinaView further author information
,
Shuai HuangKey Laboratory of Optical Information Science and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin, ChinaView further author information
,
Shengjiang ChangKey Laboratory of Optical Information Science and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin, ChinaView further author information
&
Lie LinKey Laboratory of Optical Information Science and Technology, Ministry of Education, Institute of Modern Optics, Nankai University, Tianjin, ChinaView further author information
Pages 102-107 | Received 11 May 2014, Accepted 05 Aug 2014, Published online: 17 Sep 2014
 
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Abstract

An asymmetric encryption method in 4f system based on interference is proposed in this paper. The original image is transformed into two white stationary noise images, and the decryption keys are designed to be different from the encryption keys to realize asymmetric encryption. The decryption process is implemented in a 4f system of image addition with grating. This method has very high security as the asymmetric cryptosystem encryption system but also can be easy implemented in optical system. Besides, holographic plate or photorefractive crystal is not necessary in the encryption process. The simulation results prove the feasibility and security of this method.

Additional information

Funding

Funding. This work was supported by the National Natural Science Foundation of China [grant number 61275133].

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