一种分组的信息隐藏算法

将加密信息与载体图像转换成二进制序列,把加密信息每3个位分为一组,每组的加密信息与待嵌入图像低位的信息进行比较后,修改载体图像,嵌入加密信息;提取加密信息时,找出嵌入的位置,读取标志位,根据标志位取反与否读取隐藏信息.新算法在信息嵌入量不变的情况下,修改嵌入信息位少,载体图像变化小,安全性高.新算法实现简单,嵌入信息量大,隐藏效果好,具有一定的实用价值.

An Algorithm of Hidden Information Based on Grouping

The secret information and the carrier image are turned to binary sequences,the secret sequence is divided into group,each of which contains three bits.With the results of comparing the encrypted information with the embedded image''s low bits,the different bits of each group are changed and the information is embedded.When the secret is extracted,the flag bits are read after the finding of the embedded location,then the secret was found by the sign.With the same embedded quantity,the new algorithm obtains less altered bits,higher security and small changes in original image.Experiments show that this method has large hidden information capacity,good hidden effect and a certain practical value.