Hua Yuan Xiao-Ping Zhang A Secret Key Based Multiscale Fragile Watermark in the Wavelet Domain. 1333-1336 2006 conf/icmcs/2006 ICME http://doi.ieeecomputersociety.org/10.1109/ICME.2006.262785 db/conf/icmcs/icme2006.html#YuanZ06