基于高频DCT系数的F5隐写检测

Research of F5 Stego-detecting Algorithm Based on High-frequency DCT Coefficient

传统的检测能够有效检测时空域和频率域连续嵌入的信息隐藏算法,但对于扩散嵌入、随机嵌入等非连续的隐藏算法并不适用,F5算法就是这样一种抗检测性很高的隐写算法。本文提出了一种基于高频DCT系数的新型、快速、高效的检测方法,通过对大量大小不同及量化参数不同的F5加密图像的测试,结果表明该算法可以实现准确的检测。

The general statistical attack can be applied to many embedding paradigms, such as Jsteg and Outguess0.13. The F5 algorithm embeds message bits into randomly-chosen DCT coefficients and employs matrix embedding that minimizes the necessary number of changes to embed a message of certain length. This type of embedding cannot be detected by statistical attack. In this paper, we present a steganalytic method based on high-frequency DCT coefficient that can reliably detect messages hidden in JPEG images using the steganographic algorithm FS. The method is tested on a diverse set of test images with different Q. Experimental results indicate that it can well and truly detect these images.