In order to realize the secure transmission of the H.264 compressed video bitstream, a detailed analysis of the structure for video bitstream is performed. The parameter set and frame header data related to video decoding are retained, and the slice data payload in the network abstraction layer unit is selected as the encryption object. The video format is compliant under the premise of real time and security. The novel cross-coupled chaotic system is designed as the key stream generation component, and the key stream is closely related to the plaintext through the synchronization vector mechanism. When part of the ciphertext stream is lost, the subsequent units can still be decrypted normally, which solves the problem of robustness encryption and decryption for video stream based on chaotic cipher. Detailed performance testing and security analysis data show that the proposed scheme has obvious advantages over existing research in terms of time overhead, compression ratio, anti-chosen-plaintext attack and robustness.

中文翻译：

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基于交叉耦合混沌密码的H.264压缩码流鲁棒视频加密

为了实现H.264压缩视频码流的安全传输，对视频码流的结构进行了详细分析。保留与视频解码相关的参数集和帧头数据，选择网络抽象层单元中的切片数据载荷作为加密对象。视频格式在实时和安全的前提下是合规的。将新型交叉耦合混沌系统设计为密钥流生成组件，密钥流通过同步向量机制与明文密切相关。当部分密文流丢失时，后续单元仍能正常解密，解决了基于混沌密码的视频流加解密鲁棒性问题。