Improving security of JPEG2000-based robust hashing using key dependent wavelet packet subband structures
Gerold Laimer, Andreas Uhl · 2007
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). Key–Words: robust image hashing, perceptual hashing, image authentication, JPEG2000, wavelet packets 1