Improved Security in Multimedia Video Surveillance Using 2D Discrete Wavelet Transforms and Encryption Framework

As the rate of the video is increasing on the internet, the security of video data is considered as a critical issue. In case of video surveillance application, the multimedia video streams require the video to be transmitted in a more secure way to its corresponding monitoring site. The multimedia video security is improved in this paper using a compression based encryption module. 2D Discrete Wavelet Transforms method is used for the compression process. The wavelet transform eliminates the low visual information, and it is scrambled and rotated for the encryption process. The encryption is handled using a series of the permutation-diffusion framework that helps in encrypting each video frame for possible secured transmission. The diffusion is carried out using Logistic chaotic maps, and the permutated blocks are encrypted with block-wise encryption. The experimental results show that the proposed video security framework achieves an improved performance against the existing method in terms of PSNR, SSIM, key size, and compression ratio, error rate.