Double random number encryption blind watermarking technique based on DWT-DCT domain  

作　　者：WANG Chenglong MA Yi WANG Xia 

机构地区：[1]National Engineering Research Center for Technology and Equipment of Environmental Deposition,Lanzhou Jiaotong University,Lanzhou,730070,China [2]Key Laboratory of Opto-Technology and Intelligent Control Ministry of Education,Lanzhou Jiaotong University,Lanzhou,730070,China

出　　处：《Optoelectronics Letters》2024年第10期614-622,共9页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.52066010);the Key Research and Development Program of Gansu Province(No.20YF8GA039)。

摘　　要：Blind watermarking plays a significant role in copyright protection and information hiding.To enhance the security of watermark image information,a dual encryption method is proposed,which combines block shuffling with Logistic chaos encryption using two sets of random numbers as keys.This dual encryption technique is applied to blind watermark images,utilizing a combination of discrete wavelet transform(DWT)and discrete cosine transform(DCT)as the embedding method.First,the watermark image is divided into small blocks,which are shuffled and rearranged using one set of random numbers as the key,while recording the shuffling sequence of block positions.Subsequently,the shuffled blocks are reassembled into an image,and another set of random numbers is used as the key for Logistic chaos encryption,rendering the watermark image chaotically invisible.Then,a double DWT is applied to the carrier image,followed by a DCT,allowing the encrypted watermark image to be embedded.This achieves the concealment of the blind watermark.Experimental results demonstrate that this method exhibits robustness,excellent invisibility,and secrecy.

关 键 词：RANDOM image DCT 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TP309.7[自动化与计算机技术—计算机科学与技术]