On the Design of Perceptual MPEG-Video Encryption Algorithms

Details On the Design of Perceptual MPEG-Video Encryption Algorithms On the Design of Perceptual MPEG-Video Encryption Algorithms

2005-01-08

arxiv.org/abs/cs/0501014v3

IEEE Transactions on Circuits and Systems for Video Technology, vol. 17, no. 2, pp. 214-223, 2007

Computer Science

Multimedia

10 pages, 5 figures, IEEEtran.cls

Scientific paper

10.1109/TCSVT.2006.888840

In this paper, some existing perceptual encryption algorithms of MPEG videos are reviewed and some problems, especially security defects of two recently proposed MPEG-video perceptual encryption schemes, are pointed out. Then, a simpler and more effective design is suggested, which selectively encrypts fixed-length codewords (FLC) in MPEG-video bitstreams under the control of three perceptibility factors. The proposed design is actually an encryption configuration that can work with any stream cipher or block cipher. Compared with the previously-proposed schemes, the new design provides more useful features, such as strict size-preservation, on-the-fly encryption and multiple perceptibility, which make it possible to support more applications with different requirements. In addition, four different measures are suggested to provide better security against known/chosen-plaintext attacks.

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