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    Key-space analysis of double random phase encryption technique


    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:

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