关键词: 隐写分析, BPCS算法（位平面复杂度分割）, 复杂度直方图, 位平面像素块

Abstract:

Bitplane complexity segmentation (BPCS) steganography replaces bitplane pixel blocks of high complexity with secret data. The continuity of the complexity histogram of the pixel block is affected by the embedded data. Based on the analysis of the security flaw in the BPCS steganography, a detection algorithm against BPCS embedding is proposed. The algorithm can reliably detect the existence of hidden data. It is easy to implement and computationally efficient, and suitable for realtime detection.

Key words: steganalysis, BPCS (Bit-plane complexity segmentation), complexity histogram, bit-plane pixel blocks