A Novel Key-Based Transposition Scheme for Text Encryption

  title={A Novel Key-Based Transposition Scheme for Text Encryption},
  author={Sidra Malik},
  journal={2011 Frontiers of Information Technology},
Crypt21 is designed in this paper, a block cipher which uses classical substitution whereas a new transposition scheme. The transposition scheme proposed is entirely dependent on key and induces security by having substitution and transposition both dependant on key. The design is iterative and can be extended to many rounds. Strengths include that it is safe from frequency analysis and dependant on original key in many ways. Weaknesses include possibilities of related key attacks due to weak… CONTINUE READING


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