一种改进的基于汉明码的图像隐写术算法  

An Improved Security Steganographic Algorithm Based on Hamming Code

作　　者：叶勇超 陈贞佐 杨任尔[1] 李亚峰[2] YE Yong-chao;CHEN Zhen-zuo;YANG Ren-er;LI Ya-feng(Faculty of Information Science and Engineering,Ningbo University,Ningbo 315211,China;Zhejiang Business Technology Institute,Ningbo 315211,China)

机构地区：[1]宁波大学信息科学与工程学院,宁波315211 [2]浙江工商职业技术学院,宁波315012

出　　处：《无线通信技术》2018年第3期7-10,共4页Wireless Communication Technology

基　　金：国家自然基金(61672302);宁波市自然科学基金(2015A610140);浙江省信息与通信工程重中之重学科开放基金(XKXL1524)

摘　　要：基于汉明码的隐写算法安全性较低的问题,提出了一种改进的基于汉明码的隐写算法。该算法按照汉明码嵌入算法的原理,首先对载体图像和秘密信息分别进行分组,然后通过对汉明码的检验矩阵与分组像素组的最低位以及秘密信息进行运算,来确定载体图像中最低比特位需要翻转的像素位置,再利用像素频数平衡算法对该像素最低位进行翻转处理。实验结果表明,本文提出的隐写算法与基于汉明码隐写算法相比,在同样的嵌入率、嵌入效率保持不变的情况下,相对熵与直方图失真有了较大程度上减少,因此也提高了隐写系统的安全性。This paper presents an improved steganographic algorithm based on Hamming code for the low security of steganographic algorithm based on Hamming code. According to the principle of the Hamming code embedding algorithm,the algorithm firstly separates the cover image and the secret message,and then computes the lowest bits in the cover image by performing operations on the Hamming code check matrix and the lowest bits of the group of pixels and the secret message. The position of the pixel to be flipped is used,and the lowest frequency bit of the pixel is inverted using a pixel frequency balance algorithm. The experimental results show that compared with the Hamming code steganography algorithm,the steganography algorithm proposed in this paper has relatively reduced relative entropy and histogram abnormality when the embedding rate and embedding efficiency remain unchanged. It also improves the security of steganographic systems.

关 键 词：隐写算法 汉明码 相对熵 直方图失真 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]