中文说明：
为了提高密码的抗攻击性，系统使用随机性超混沌很好！再生可以识别，关键特征是空间较大，一种基于四维超混沌系统和扩展映射的实时视频流加密算法.
English Description：
the Abstract: In order to improve the" anti - aggressive use of the system randomness hyperchaos good!Regeneration can be identified, and the key characteristics of the larger space, a row -based on four - dimensional hyperchaotic system and expansion of the mapping of real - time video stream encryption algorithm.