Image encryption and the fractional Fourier transform
A number of method have been recently proposed in the literature for the encryption of 2-D information using optical systems based on the fractional Fourier fransform, FRT. In this paper a brief review of the methods proposed to date is presented. A measure of the strength/robustness of the level of encryption of the various techniques is proposed and a comparison is carried out between the methods. Optical implementations are discussed. Robustness of system with respect to misalignment and blind decryption are also discussed.
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Document Type: Research Article
Affiliations: Department of Electronic and Electrical Engineering, Faculty of Architecture and Engineering, University College Dublin, Belfield, Dublin 4, Ireland
Publication date: 2003-09-01