Monaghan, David S. and Gopinathan, Unnikrishnan and Naughton, Thomas J. and Sheridan, John T. (2007) Key-space analysis of double random phase encryption technique. Applied Optics, 26. pp. 6641-6647. ISSN 0003-6935

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Abstract

We perform a numerical analysis on the double random phase encryption∕decryption technique. The key-space of an encryption technique is the set of possible keys that can be used to encode data using that technique. In the case of a strong encryption scheme, many keys must be tried in any brute-force attack on that technique. Traditionally, designers of optical image encryption systems demonstrate only how a small number of arbitrary keys cannot decrypt a chosen encrypted image in their system. However, this type of demonstration does not discuss the properties of the key-space nor refute the feasibility of an efficient brute-force attack. To clarify these issues we present a key-space analysis of the technique. For a range of problem instances we plot the distribution of decryption errors in the key-space indicating the lack of feasibility of a simple brute-force attack.

Item Type:	Article
Keywords:	Key-space analysis; double random phase encryption technique; encryption schemes;
Academic Unit:	Faculty of Science and Engineering > Computer Science
Item ID:	8449
Identification Number:	https://doi.org/10.1364/AO.46.006641
Depositing User:	Thomas Naughton
Date Deposited:	12 Jul 2017 15:55
Journal or Publication Title:	Applied Optics
Publisher:	Optical Society of America
Refereed:	Yes
Funders:	Enterprise Ireland, Science Foundation Ireland, Irish Research Council for Science Engineering and Technology (IRCSET)
URI:	https://www.osapublishing.org
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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