Methods for encrypting and decrypting MPEG video data efficiently
MULTIMEDIA '96 Proceedings of the fourth ACM international conference on Multimedia
An Empirical Study of Secure MPEG Video Transmissions
SNDSS '96 Proceedings of the 1996 Symposium on Network and Distributed System Security (SNDSS '96)
Performance Study of a Selective Encryption Scheme for the Security of Networked, Real-Time Video
ICCCN '95 Proceedings of the 4th International Conference on Computer Communications and Networks
MMSD '96 Proceedings of the 1996 International Workshop on Multimedia Software Development (MMSD '96)
Efficient frequency domain selective scrambling of digital video
IEEE Transactions on Multimedia
Compressed-domain scrambler/descrambler for digital video
IEEE Transactions on Consumer Electronics
Improving the performance of security of real-time video over IP
AIC'10/BEBI'10 Proceedings of the 10th WSEAS international conference on applied informatics and communications, and 3rd WSEAS international conference on Biomedical electronics and biomedical informatics
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Nowadays it is easy and fast to deliver and communicate the digital video contents. Therefore, security problem reveals followed in applications such as video-on-demand, videoconference and video chatting system. In this paper, a scrambling scheme employing novel grouping strategy is proposed to encrypt the compressed video data. In new scheme, the scrambling and descrambling operations are embedded into the video encoding and decoding processes. DCT coefficients are divided into 64 groups according to their positions in 8×8 size blocks, and scrambled inside each group. Besides, motion vectors are also grouped and permuted in term of their modes. Thus the influence on statistical property of the video data is reduced furthest. Experimental results show that the proposed method has less bitstream overhead and no any image quality degradation. It is also indicated that the security is enhanced considerably via extending the scrambling range. A content-based dynamic secret key method is also presented to withstand the known-plaintext attack.