With the rapid development and popularization of the Internet, the dependency of human life on the Internet is increasing by degrees. The demand for video transmission is also rising with the emergence of portable and handheld devices such as mobile phones, tablets, laptops, etc. The scalability of Scalable Video Coding (SVC) determines that it can meet the needs of the newly emerged devices or terminals. Despite this advancement, security is still one of the major challenges. Based on the research of network security, this paper deeply discusses the encryption technology, and puts forward a new point multiplication algorithm using SVC and sliding window, which makes the algorithm more flexible, improves the efficiency of the algorithm to a certain extent, greatly reduces the expected calculation and storage of the algorithm, and makes the algorithm to adapt the memory limited environment such as smart card. Critical analysis of the proposed DES algorithm is carried out and different fragile keys are recommended which is not safe for secure encryption. This study also present the complete overview of the SVC technology and its multi-layered stream representation in the form of temporal, spatial, and SNR resolution. In addition, an encryption method based on the DES algorithm is also proposed.

随着互联网的快速发展和普及，人类生活对互联网的依赖程度越来越高。随着手机、平板电脑、笔记本电脑等便携式和手持设备的出现，视频传输的需求也在不断上升。Scalable Video Coding（SVC）的可扩展性决定了它可以满足新兴设备或终端的需求. 尽管取得了这一进步，但安全仍然是主要挑战之一。本文在对网络安全研究的基础上，对加密技术进行了深入探讨，提出了一种新的使用SVC和滑动窗口的点乘算法，使算法更加灵活，在一定程度上提高了算法的效率，大大降低了算法的预期计算和存储，并使算法适应智能卡等内存有限的环境。对所提出的 DES 算法进行了批判性分析，并推荐了不同的脆弱密钥，这对于安全加密来说是不安全的。本研究还以时间、空间和 SNR 分辨率的形式全面介绍了 SVC 技术及其多层流表示。此外，还提出了一种基于DES算法的加密方法。