Simultaneous video compression and encryption for real-time secure transmission

Video compression and encryption became very essential in secured real time video transmission. Applying both techniques simultaneously is one of the challenges where the size and the quality are important. In this paper we propose a new technique for video compression and encryption. The compression bases on hybridizing DWT, DCT and vector quantization. The compression algorithm includes two major steps, reference frame encoding and current frame encoding based on the reference frame. The encryption algorithm utilizes two LFSRs seeded with three secret keys to scramble the significant wavelet coefficients multiple times. Both algorithms are applied simultaneously in the wavelet domain. Experimental results show that the proposed algorithms have the following properties; high compression, acceptable quality, and resistance to the statistical and frequency attack with low computational overhead.