Cryptanalysis of an image scrambling scheme without bandwidth expansion

Shujun Li, Chengqing Li, Kwok Tung Lo, Guanrong Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

44 Citations (Scopus)


Recently, a new image scrambling (i.e., encryption) scheme without bandwidth expansion was proposed based on two-dimensional discrete prolate spheroidal sequences. A comprehensive cryptanalysis is given here on this image scrambling scheme, showing that it is not sufficiently secure against various cryptographical attacks including ciphertext-only attack, known/chosen-plaintext attack, and chosen-ciphertext attack. Detailed cryptanalytic results suggest that the image scrambling scheme can only be used to realize perceptual encryption but not to provide content protection for digital images.
Original languageEnglish
Article number4448993
Pages (from-to)338-349
Number of pages12
JournalIEEE Transactions on Circuits and Systems for Video Technology
Issue number3
Publication statusPublished - 1 Mar 2008


  • Chosen-ciphertext attack
  • Chosen-plaintext attack
  • Ciphertext-only attack
  • Cryptanalysis
  • Discrete prolate spheroidal sequence (DPSS)
  • Encryption
  • Hadamard matrix
  • Image scrambling
  • Known-plaintext attack
  • Perceptual encryption

ASJC Scopus subject areas

  • Media Technology
  • Electrical and Electronic Engineering


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