A fast video encryption scheme suitable for network applications

Video encryption is suitable for video protection. A video encryption scheme combining an encryption process with the MPEG2 encoding process is presented. It encrypts I-frames with color plane confusion, coefficient confusion and sign encryption, encrypts the intra-macroblocks in P/B-frames with coefficient confusion and sign encryption, and encrypts the inter-macroblocks with motion vector encryption. Theoretical analysis and experimental results show that the scheme is secure, of low cost, supports direct bit-rate control and is more robust to transmission errors. These properties make it suitable for multimedia applications with real-time operation and a direct bit-rate control requirement, such as video conference, multimedia network, wireless or mobile multimedia, and so on.