On the design of perceptual MPEG-video encryption algorithms

Shujun Li, Guanrong Chen, Albert Cheung, Bharat Bhargava, Kwok Tung Lo

Research output: Journal article publicationJournal articleAcademic researchpeer-review

149 Citations (Scopus)


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 in MPEG-video bit streams 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.
Original languageEnglish
Pages (from-to)214-223
Number of pages10
JournalIEEE Transactions on Circuits and Systems for Video Technology
Issue number2
Publication statusPublished - 1 Feb 2007


  • Cryptanalysis
  • Fixed-length codeword (FLC)
  • Known/chosen-plaintext attack
  • MPEG
  • Perceptual encryption

ASJC Scopus subject areas

  • Media Technology
  • Electrical and Electronic Engineering


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