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Journal Article Transformed-key asymmetric watermarking system
Cited 28 time in scopus Share share facebook twitter linkedin kakaostory
Authors
Hyuk Choi, Kiryung Lee, Taejeong Kim
Issue Date
2004-02
Citation
IEEE Signal Processing Letters, v.11, no.2, pp.251-254
ISSN
1070-9908
Publisher
IEEE
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1109/LSP.2003.819873
Abstract
This letter proposes a new asymmetric watermarking system. In the proposed system, a linear transformation A is applied to the primitive key u to form the private encoding key Au and the public decoding key A-t u, where -t denotes inverse transpose. The transformation mostly cancels out when the decoding key is correlated to watermarked signal containing the encoding key, which is possibly contaminated with noise. Our analysis shows that this simple scheme provides not only reliability in watermark detection but also security from any attempts to identify or erase the "encoding" key. We also address the issue of selecting a good transformation matrix. The proposed system can be made fit for each application by properly designing the transform.
KSP Keywords
Linear transformation, asymmetric watermarking, transformation matrix