Breaking a modified substitution-diffusion image cipher based on chaotic standard and logistic maps

Chengqing Li, Shujun Li, Kwok Tung Lo

Research output: Journal article publicationJournal articleAcademic researchpeer-review

95 Citations (Scopus)


Recently, an image encryption scheme based on chaotic standard and logistic maps was proposed by Patidar et al. It was later reported by Rhouma et al. that an equivalent secret key can be reconstructed with only one known/chosen-plaintext and the corresponding ciphertext. Patidar et al. soon modified the original scheme and claimed that the modified scheme is secure against Rhouma et al.'s attack. In this paper, we point out that the modified scheme is still insecure against the same known/chosen-plaintext attack. In addition, some other security defects existing in both the original and the modified schemes are also reported.
Original languageEnglish
Pages (from-to)837-843
Number of pages7
JournalCommunications in Nonlinear Science and Numerical Simulation
Issue number2
Publication statusPublished - 1 Feb 2011


  • Chaos
  • Chosen-plaintext attack
  • Cryptanalysis
  • Encryption
  • Image
  • Known-plaintext attack

ASJC Scopus subject areas

  • Numerical Analysis
  • Modelling and Simulation
  • Applied Mathematics

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