基于模运算的并行隐写算法

Parallel steganography algorithm based on modular operation

针对隐写算法的不可检测性、安全性以及运行效率等性能的提高及优化,提出一个基于模运算的并行隐写算法。利用模数运算的余数循环周期性特点,采用参数化设计思想建立可变系数的最优参数表,选择最优参数确定嵌入像素值改变量最小的隐写算法方案,实现一位an进制信息隐藏到n个像素中。利用多核多线程并行计算,载体图像分块后对信息进行并行嵌入处理。实验结果表明,与同类算法相比,该方法具有更好的载密图像视觉质量和安全性,运行效率更高。

To optimize and improve the undetection,security and efficiency of the steganography algorithm,a parallel steganography algorithm based on modular operation was proposed.The remainder of the modulus operation and the parameterized design idea were used to establish the optimal parameter table of variable coefficients,the steganography algorithm which minimized the change of embedded pixel value,achieving a secret information in a n-ary notational system hiding in n pixels.Multi-core multi-threaded parallel computing was used to embed the carrier image,which was divided into blocks before embedding.Experimental results show that the proposed algorithm has better visual quality and security of encrypted image,and better performance.