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...

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Bibliographic Details
Published inOptik (Stuttgart) Vol. 114; no. 6; pp. 251 - 265
Main Authors Hennelly, B.M., Sheridan, J.T.
Format Journal Article
LanguageEnglish
Published Jena Elsevier GmbH 2003
Elsevier
Subjects
Exact sciences and technology
Fourier optics
Fractional Fourier transform
Fundamental areas of phenomenology (including applications)
Image forming and processing
Imaging and optical processing
optical image encryption
optical security
Optics
Physics
random phase mask
optical security
random phase mask
optical image encryption
Fractional Fourier transform
Fourier optics
Fractional Fourier transformation
Encryption
Image processing
Random phase
Digital simulation
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Summary: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.
ISSN:0030-4026
1618-1336
DOI:10.1078/0030-4026-00257