摘要
使用既有序列密码方法加密数字图像时密钥序列过长,密钥序列难以存储和分发。论文提出了一种新的序列密码方法加密数字图像,先把数字图像编码成文本的形式,然后使用变异后的字符编码表对文本编码作为明文,最后使用AKGA算法对明文进行加密。通过比较新方法与既有序列密码方法,可以看出新方法极大地缩短了需要存储和分发的密钥序列长度。通过对实验结果进行统计学分析表明新方法具有高度的安全性。
When encrypting digital images with the existing method of stream cipher,the key stream need to be stored and distributed is too long. In this paper,we proposed a new method of stream cipher for encrypting digital images. First, coding digital images into the form of text,then coding the text with the mutated character code table as plaintext, finaly encrypting the plaintext with AKGA algorithm. By comparing the new method with the existed method of stream cipher,we can find that the new method greatly reduces the length of key stream need to be stored and distributed. Statistical analysis to the experimental results shows that the new method has a high level of security.
基金
宝鸡文理学院校级重点项目资助(ZK15093)
