Double random fractional Fourier domain encoding for optical security

G. Unnikrishnan; Kehar Singh

doi:10.1117/1.1313498

1 November 2000 Double random fractional Fourier domain encoding for optical security

G. Unnikrishnan, Kehar Singh

Optical Engineering, Vol. 39, Issue 11, (November 2000). https://doi.org/10.1117/1.1313498

We propose a new optical encryption technique using the fractional Fourier transform. In this method, the data are encrypted to a stationary white noise by two statistically independent random phase masks in fractional Fourier domains. To decrypt the data correctly, one needs to specify the fractional domains in which the input plane, encryption plane, and output planes exist, in addition to the key used for encryption. The use of an anamorphic fractional Fourier transform for the encryption of two-dimensional data is also discussed. We suggest an optical implementation of the proposed idea. Results of a numerical simulation to analyze the performance of the proposed method are presented.

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G. Unnikrishnan and Kehar Singh "Double random fractional Fourier domain encoding for optical security," Optical Engineering 39(11), (1 November 2000). https://doi.org/10.1117/1.1313498

Published: 1 November 2000

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