A video sensing oriented speed adjustable fast multimedia encryption scheme and embedded system

In embedded video sensing system, real-time video data is high-volume. Meanwhile, the computation and energy resources are very limited, which restricts the usage of complex encryption process on video data. Therefore the confidentiality of video data under limited resources needs to be addressed. Firstly, dissymmetry with its trend between data volume and limited resources has been studied, while a strategy of resources optimization is given. Secondly, an all-purpose speed adjustable fast encryption scheme with its improved version is proposed. Thirdly, a DSP and ARM based embedded secure video sensing system is designed, and the fast encryption scheme and the improved version have been implemented in secure video data storage and transmission of system respectively. Experimental analyses show that the encryption schemes can meet the system's real-time requirements under the tight resource constraints.