分层多场景 H.265/HEVC 视频加密方案

Meng Xing, Hai Yu, Wei Zhang, Zhiliang Zhu
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引用次数: 0

摘要

随着视频流的广泛应用,流媒体信息的安全性不断面临新的挑战。现有的加密方法大多采用统一标准对所有场景进行加密,导致算法安全性和编码效率不必要地相互抑制。此外,一些加密算法也无法满足高分辨率视频的需求。我们为 H.265/ 高效视频编码(HEVC)提出了一种新颖、独立的分层视频加密系统,为多场景视频开发了一种场景自适应加密策略。此外,我们还充分考虑了伪随机数生成器的种子、压缩编码中的语法成分和场景指标。我们分析了加密视频在不同场景下的可见性,以及基于三种不同场景类别加密整合的各种语法参数的加密性能,以进一步提高加密效率和安全性。该方法的多功能性通过一系列不同分辨率、帧间运动信息显著或不显著的视频得到了验证。视频数据集的实验结果表明,我们的方案有效地平衡了安全性和编码效率。此外,场景自适应方法可根据用户需求灵活定制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Hierarchical Multiscenario H.265/HEVC Video Encryption Scheme
With the pervasive application of video streaming, the security of streaming media information continually faces new challenges. Most existing encryption methods employ uniform criteria for encrypting all scenarios, leading to unnecessary mutual inhibition of algorithm security and coding efficiency. Furthermore, several encryption algorithms are inadequate for high-resolution videos. A novel, independently hierarchical video cryptosystem for H.265/high efficiency video coding (HEVC) is proposed that develops a scene-adaptive encryption strategy tailored for multiscenario videos. Additionally, we fully consider the seeds of pseudo-random number generators, syntax components in compressed codes, and scenario indicators. We analyze the visibility of encrypted videos in different scenarios and the encryption performance of various syntax parameters based on the integration of encryption for three distinct scenario categories to further enhance encryption efficiency and security. The method’s versatility is demonstrated using a diverse array of videos with significant and insignificant inter-frame motion information across varying resolutions. The experimental results from the video datasets indicate that our scheme effectively balances security and coding efficiency. Furthermore, the scene-adaptive approach can be tailored flexibly according to subscriber needs.
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