Detection of Information Hiding by Modulating Intra Prediction Modes in H.264/AVC
Songbin Li, Xiuhua Ma, Peng Liu, Qiongxing Dai, Haojiang Deng · Proceedings of the 2nd International Conference on Computer Science and Electronics Engineering (ICCSEE 2013) · 2013
In the intra-frame coding of H.264/AVC, information hiding can be implemented by modulating the prediction modes of 4×4 luminance blocks.Since this kind of method has characteristics of high speed, good concealment and so on, it has become a great security threat.Therefore, it is necessary to study the steganalysis method.In this paper, we first analyzed the changes of remarkable characteristics in intra-frame coding caused by modulating intra prediction modes for information hiding.We found that the correlation among the prediction modes in different 4×4 luminance blocks, belonging to an intra-frame coding macroblock, was changed.According to this, we have designed statistical models to make quantitative extraction of these correlation characteristics.And a steganography detector was constructed based on the support vector machine.The experimental results show that the steganography detector constructed in this paper can achieve a detection accuracy of more than 90% when the embedding rate is larger than 25%.