Cryptanalysis of optical security systems with significant output images
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|Title:||Cryptanalysis of optical security systems with significant output images||Authors:||Situ, Guohai
Monaghan, David S.
Sheridan, John T.
|Permanent link:||http://hdl.handle.net/10197/3389||Date:||1-Aug-2007||Abstract:||The security of the encryption and verification techniques with significant output images is examined by a known-plaintext attack. We introduce an iterative phase-retrieval algorithm based on multiple intensity measurements to heuristically estimate the phase key in the Fourier domain by several plaintext-cyphertext pairs. We obtain correlation output images with very low error by correlating the estimated key with corresponding random phase masks. Our studies show that the convergence behavior of this algorithm sensitively depends on the starting point. We also demonstrate that this algorithm can be used to attack the double random phase encoding technique.||Funding Details:||Science Foundation Ireland
Irish Research Council for Science, Engineering and Technology
|Type of material:||Journal Article||Publisher:||Optical Society of America||Journal:||Applied Optics||Volume:||46||Issue:||22||Start page:||5257||End page:||5262||Copyright (published version):||2007 Optical Society of America||Subject LCSH:||Data encryption (Computer science)
Fourier transform optics
Optical data processing
|DOI:||10.1364/AO.46.005257||Other versions:||http://dx.doi.org/10.1364/AO.46.005257||Language:||en||Status of Item:||Not peer reviewed|
|Appears in Collections:||Electrical and Electronic Engineering Research Collection|
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