Abstract: Jphide is a steganography method based on control-mode table. It is more complex than other methods. Besides, there is no good method to attack it. This paper analyzes the structure of embedding message, selection process and embedding mode. It finds two statistical characteristics. It gives a detecting method, which can estimate the length of secret message as rate is 10%~50%.

Key words: steganalysis, Jphide algorithm, length estimation

摘要： Jphide是一种基于控制表的隐写算法，通过控制表确定嵌入位置和消息嵌入方式，其设计原理复杂，安全性较高，目前尚没有较好的攻击方法。基于此，从嵌入数据组成、选位方法、嵌密方式等3个方面剖析Jphide原理，提出Jphide的2个新统计特征，给出针对性的检测方法，并且在嵌入率为10%~50%时可以准确估计出嵌入率。

关键词: 隐写分析, Jphide算法, 长度估计

CLC Number: 

• TP309