Asymmetric Fragile Watermarking Using a Number Theoretic Transform

Hideaki TAMORI  Tsuyoshi YAMAMOTO  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E92-A   No.3   pp.836-838
Publication Date: 2009/03/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E92.A.836
Print ISSN: 0916-8508
Type of Manuscript: Special Section LETTER (Special Section on Latest Advances in Fundamental Theories of Signal Processing)
number theoretic transform,  asymmetric watermarking,  fragile watermarking,  image authentication,  

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We propose an asymmetric fragile watermarking technique that uses a number theoretic transform (NTT). Signature data is extracted from a watermarked image by determining correlation functions that are computed using the NTT. The effectiveness of the proposed method is evaluated by simulated detection of altering.