Title :
Real time watermarking to authenticate the WSQ bitstream
Author :
Ait Saadi, K. ; Zebbiche, Khalil ; laadjel, M. ; Morsli, M.A.
Author_Institution :
Centre de Dev. des Technol. Av., Algiers, Algeria
Abstract :
Fingerprints are becoming popular in automated systems and for IT system user authentication. They are unique to each person and are designed to allow instant establishment personal identity in real time application. Enhancing their security in terms of fidelity and integrity becomes paramount. Since fingerprint images are usually compressed using Wavelet-packet Scalar Quantization (WSQ) before they are transmitted over networks, in this paper, we apply a fragile watermarking algorithm operating directly in compressed domain for protecting the evidentiary integrity of the WSQ bitstream. This work is motivated by the results obtained in previous video watermarking methods working in variable length codeword (VLC) domain to provide real time detection. The principle of the method is based on mapping the codewords to the outside of the used codespace, the watermark is embedded into stream as forced bit errors. The developed algorithm achieves high capacity and preserves the file size of WSQ bitstream while maintaining high perceptible quality.
Keywords :
image coding; image watermarking; quantisation (signal); security of data; IT system user authentication; WSQ bitstream authentication; automated system; fingerprint image; personal identity; real time detection; real time watermarking; security; variable length codeword domain; wavelet-packet scalar quantization; Biomedical imaging; Decoding; Discrete wavelet transforms; Fingerprint recognition; PSNR; Standards; Fingerprint protection; WSQ standard; authentication; security; watermarking;
Conference_Titel :
Image Processing Theory, Tools and Applications (IPTA), 2012 3rd International Conference on
Conference_Location :
Istanbul
Print_ISBN :
978-1-4673-2585-1
DOI :
10.1109/IPTA.2012.6469556