In this study, an efficient scheme for hiding data directly in partially encrypted versions of high efficiency video coding (HEVC) videos is proposed. The content owner uses stream cipher to selectively encrypt some HEVC‐CABAC bin strings in a format‐compliant manner. Then, the data hider embeds the secret message into the encrypted HEVC videos using the specific coefficient modification technique. Consequently, it can be used in third‐party computing environments (more generally, cloud computing). For security and privacy purposes, service providers cannot access the visual content of the host video. As the coefficient is only slightly modified, the quality of the decrypted video is satisfactory. The encrypted and marked bitstreams meet the requirements of format compatibility, and have the same bit rate. At the receiving end, data extraction can be performed in the encrypted domain or decrypted domain that can be adapted to different application scenarios. Several standard video sequences with different resolutions and contents have been used for experimental evaluation.

中文翻译：

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隐藏在部分加密的HEVC视频中的数据

在这项研究中，提出了一种直接在高效视频编码（HEVC）视频的部分加密版本中直接隐藏数据的有效方案。内容所有者使用流密码以符合格式的方式选择性地加密某些HEVC-CABAC bin字符串。然后，数据隐藏程序使用特定系数修改技术将机密消息嵌入加密的HEVC视频中。因此，它可以用于第三方计算环境（更一般而言，云计算）。为了安全和隐私目的，服务提供商不能访问主机视频的视觉内容。由于系数仅稍作修改，因此解密视频的质量令人满意。加密和标记的比特流满足格式兼容性的要求，并且具有相同的比特率。在接收端，数据提取可以在可以适应不同应用场景的加密域或解密域中执行。具有不同分辨率和内容的几种标准视频序列已用于实验评估。