基于数字水印和迭代算法的信息加密技术  

Information Encryption Technology Based on Digital Watermarking and Iteration Algorithm

作　　者：解青坤 姜艳茹[1,2] 张文飞[1,2] 王静 屈恩世 

机构地区：[1]西安光学精密机械研究所信息光子学研究室,陕西西安710119 [2]中国科学院大学,北京100049

出　　处：《光学学报》2016年第6期76-83,共8页Acta Optica Sinica

基　　金：国家自然科学基金(61505246)

摘　　要：数字水印技术是一种新型的光信息加密技术,具有很强的伪装能力,但受到相位探测误差问题的限制,在信号还原过程中,传统的通过先求解相位后逆光路计算明文信息的方法并不具有实用性。迭代算法通过在频谱域和空间域施加有关约束,可有效实现对微弱信号的还原。结合数字水印技术和迭代算法的有关理论,提出了一种新的信息加密和还原技术,可以突破相位探测误差问题的限制。此外,该技术可以有效地隐藏和还原目标信息,对相位板的准确性要求高,使得信息难以被破解。理论分析和仿真结果表明,平均均方误差在经过若干次迭代计算后,成功收敛,其还原系统具有高稳健性。该技术具有伪装能力强、恢复算法收敛快的优点,可广泛应用于个人身份伪装和信息识别等领域。The digital watermarking technology is a new information encryption technology.It has a good capacity in camouflage.However,it is limited by the phase detection errors,and the traditional retrieval algorithms are unpractical by means of calculating phase first and then deducing the original images in the process of restoring signal.The iteration algorithm can efficiently reconstruct these weak signals by applying some constrains in frequency domain and spatial domain.A new technology of information encryption and reconstruction is proposed combining with the theory of digital watermarking and iteration algorithm.This technology can overcome the limitation of phase detection errors.Furthermore,it can effectively hide and recover the embedded information,and the information can hardly be deciphered,which depends on the accuracy of phase information.Theoretical analysis and simulation results demonstrate that mean square error of the proposed algorithm can accomplish convergence by only several iterations within few seconds,which shows high robustness.It has a good performance in camouflage and fast-convergence,and could be widely applied in personal identity camouflage and information identity.

关 键 词：傅里叶光学 图像加密 数字水印 迭代法 

分 类 号：O438[机械工程—光学工程]