Format-compliant encryption techniques for high efficiency video coding
Format-compliant encryption techniques for high efficiency video coding
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DOI：
10.1109/icip.2013.6738944
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发表时间：
2013-09
期刊：
影响因子：
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通讯作者：
G. V. Wallendael;J. D. Cock;S. V. Leuven;Andras Boho;P. Lambert;B. Preneel;R. Walle
中科院分区：
文献类型：
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作者：
G. V. Wallendael;J. D. Cock;S. V. Leuven;Andras Boho;P. Lambert;B. Preneel;R. Walle
当中间盒设备应该能够在没有解密密钥的情况下适应网络中的加密视频流时，应该应用格式兼容的部分加密方案。在本文中，我们提出了这样的加密方案，最近标准化的高效率视频编码（HEVC）标准。通过加密特定语法元素，如残差信息的符号、运动向量（MV）差的符号、MV预测索引和MV参考索引，提供了格式遵从性和自适应的可能性。当从加密运动信息转移到加密剩余符号并最终转移到其组合时，加扰性能逐渐增加。应用所有这些技术对压缩效率的影响可以忽略不计。
When middlebox devices should be able to adapt an encrypted video stream in the network without having the decryption key, format-compliant partial encryption schemes should be applied. In this paper, we propose such encryption schemes for the recently standardized High Efficiency Video Coding (HEVC) standard. By encrypting specific syntax elements like the sign of the residual information, the sign of the motion vector (MV) difference, the MV prediction index, and the MV reference index, format compliance and the possibility for adaptation are offered. Scrambling performance gradually increases when shifting from encrypting the motion information to encrypting the residual sign and finally to the combination thereof. Applying all these techniques has a negligible impact on the compression efficiency.