A selective encryption scheme for protecting H.264/AVC video in multimedia social network

Aiming to protect H.264/AVC video in multimedia social network, a selective encryption scheme is put forward. In the scheme, after analyzing the impact of quantization parameter (QP) on the encryption of the sign of T1 s and the impact of encrypting inter-macroblock non-zero coefficients, the sign of intra-macroblock non-zero DCT coefficients, the sign of trailing ones (T1 s), the intra prediction modes (IPMs) and the sign of motion vector difference (MVD) are encrypted to protect the texture and motion information of H.264/AVC. Experimental results and analysis show that the computation cost is low and the bitrate increment is negligible, and it can achieve good performance in resisting brute-force attacks, histogram-based attacks and replacement attacks. Based on the encryption scheme, a framework of its implementation in multimedia social network is put forward. It has great potential to be implemented for the video data protection in multimedia social network.

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