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Optical Engineering • Open Access

Universal and special keys based on phase-truncated Fourier transform

Paper Abstract

We propose a novel optical asymmetric cryptosystem based on a phase-truncated Fourier transform. Two decryption keys independent of each other are generated. They are referred to as universal key and special key, respectively. Each of them can be used for decryption independently in absence of the other. The universal key is applicable to decrypt any ciphertext encoded by the same encryption key, but with poor legibility. On the contrary, the special key is adequate for legible decryption, but only valid for one ciphertext corresponding to the specified plaintext. A set of simulation results show the interesting performance of two types of decryption keys.

Paper Details

Date Published: 1 August 2011
PDF: 4 pages
Opt. Eng. 50(8) 080501 doi: 10.1117/1.3607421
Published in: Optical Engineering Volume 50, Issue 8
Show Author Affiliations
Wan Qin, Shenzhen Univ. (China)
Xiang Peng, Shenzhen Univ. (China)
Bruce Gao, Clemson Univ. (United States)
Xiangfeng Meng, Shandong Univ. (China)


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