Improving security of JPEG2000-based robust hashing using key dependent wavelet packet subband structures

Authors:
Gerold Laimer;Andreas Uhl
Affiliations:
University of Salzburg, Department of Computer Sciences, Salzburg, Austria;University of Salzburg, Department of Computer Sciences, Salzburg, Austria
Venue:
WAMUS'07 Proceedings of the 7th WSEAS international conference on Wavelet analysis & multirate systems
Year:
2007

Citing 5
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Key-dependent JPEG2000-based robust hashing for secure image authentication

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Abstract

We discuss a JPEG2000 packet data based hashing scheme for robust image authentication. Motivated by attacks against the approach, key-dependency is added by means of employing a randomized wavelet packet scheme in the wavelet decomposition stage. Attacks can be prevented effectively employing key dependency but the parameters required for this approach lead to decreased compression robustness which has to be compensated by an decrease of the hash length (which of course reduces security).