A Multi-Level Secure Video Encryption Framework Integrating Scalable Video Coding with Joint Source-Channel Cryptography

With the rapid development of video applications and increasing demands for secure transmission, traditional video encryption methods face challenges in balancing security and efficiency. This paper proposes a novel multi-level secure video encryption scheme that combines Scalable Video Coding (SVC) with source-Joint encryption. The scheme first analyzes the limitations of direct source-Joint encryption in video protection, then introduces a layered approach based on SVC principles. By decomposing video frames into YUV color spaces and applying wavelet transform, the content is structured into base and enhancement layers. A threshold secret sharing mechanism is implemented to provide differentiated security levels, where the base layer ensures basic visual quality while enhancement layers offer progressive improvements. The experimental results demonstrate superior performance compared to traditional methods, achieving a bit error rate (BER) close to 0.5 for unauthorized access while maintaining high reconstruction quality (PSNR > 40dB) for authorized users. Security analysis shows effective resistance against statistical and differential attacks. The proposed scheme successfully achieves flexible access control, efficient transmission, and robust security, making it particularly suitable for scenarios requiring multi-level security in video applications.