摘要
针对传统的图像预测误差算法预测精度弱、嵌入容量较低以及在密文域应用局限等问题。结合Paillier同态加密算法,提出了一种基于插值预测误差的密文域可逆信息隐藏算法。该方案首先对原始载体图像进行采样,然后引入权重,利用采样像素点对非采样像素点进行预测,而后采样像素点利用序列密码进行加密,非采样像素点利用Paillier同态算法加密,最后在加密后的图像上进行秘密信息的嵌入。实验仿真结果表明,该方案在保证预测精度的前提下,可以达到的最高嵌入容量为1.2 bpp,同时具有一定的安全性保证。
Considering the accuracy of traditional algorithm of the prediction error is weak, embedding capacity is low and the ap-plication in encrypted domain is limited, in this paper, an algorithm of reversible data hiding in encrypted domain based on prediction error of interpolation which combines paillier homomorphic encryption algorithm was proposed. At first the original cover image was sampled and weight was introduced, so that the non-sample pixels could be predicted using the sample pixels. Then the sample pixels were encrypted with stream cipher and the non-sample pixels were encrypted using paillier homomorphic algorithm. At last, the secret information was embedded in encrypted image. Demonstrations from experimental results show that the scheme can guarantee the accuracy of prediction and in this premise the highest embedding capacity that can be achieved is 1. 2 bpp. Besides,a certain safety can be guaranteed in the scheme proposed.
出处
《电子技术应用》
北大核心
2017年第12期120-124,129,共6页
Application of Electronic Technique
基金
国家自然科学基金(61379152)
关键词
信息安全
密文域可逆隐写
预测误差
插值
同态加密算法
information security
reversible data hiding in encrypted domain
prediction error（PE）
interpolation
homomorphic encryption algorithm
