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Proceedings Paper

Collision in double-phase encryption based on fractional Fourier transform
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Paper Abstract

Collision is a situation that occurs when two or more distinct inputs into a security system produce identical outputs, which is undesirable in security applications such as watermarking and authentication. In this report we present a study of the collision property of double random-phase encoding (DRPE) in the fractional Fourier (FRT) domain. For a decade, optical security systems operating in the FRT domain is said to have a larger key space and therefore higher security. However we find that it is still possible to produce meaningful collision from the cyphertext or a watermarking embedded in a host image even without any knowledge about the fractional orders or the random phase keys.

Paper Details

Date Published: 19 November 2009
PDF: 6 pages
Proc. SPIE 7512, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Information Security, 751205 (19 November 2009); doi: 10.1117/12.837579
Show Author Affiliations
Guohai Situ, Univ. Stuttgart (Germany)
Giancarlo Pedrini, Univ. Stuttgart (Germany)
Wolfgang Osten, Univ. Stuttgart (Germany)


Published in SPIE Proceedings Vol. 7512:
2009 International Conference on Optical Instruments and Technology: Optoelectronic Information Security

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