With considerable development of the network and multimedia technology

the security problem of the video data becomes more urgent.In this paper

the scrambling strategy and methods to hide the video data are discussed deeply in the spatial and frequency domains

followed by the security of these methods and the principles of the scrambling.The means to increase the security of the scrambling methods and reduce the influence of compression efficiency and video quality due to the scrambling are analyzed in details.Based on these

the existing methods are improved in the experiments.The experimental results show that the combination of spatial and frequency domain methods enhances the security of video data.Differing from the traditional encryption methods

these scrambling methods being proposed can be embedded into the video encoding and decoding processes compactly.