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Structural digital signature for image authentication: an incidental distortion resistant scheme

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2 Author(s)
Chun-Shien Lu ; Inst. of Inf. Sci., Acad. Sinica, Taipei, Taiwan ; Liao, H.-Y.M.

The existing digital data verification methods are able to detect regions that have been tampered with, but are too fragile to resist incidental manipulations. This paper proposes a new digital signature scheme which makes use of an image's contents (in the wavelet transform domain) to construct a structural digital signature (SDS) for image authentication. The characteristic of the SDS is that it can tolerate content-preserving modifications while detecting content-changing modifications. Many incidental manipulations, which were detected as malicious modifications in the previous digital signature verification or fragile watermarking schemes, can be bypassed in the proposed scheme. Performance analysis is conducted and experimental results show that the new scheme is indeed superb for image authentication.

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Multimedia, IEEE Transactions on  (Volume:5 ,  Issue: 2 )