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Modified PCT on Variable Cipher Block Chaining Mode

  • Manas Paul
  • Jyotsana Kumar Mandal
  • Moirangthem Marjit Singh
Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 340)

Abstract

Permutative Cipher Technique (PCT), a session based symmetric key cryptographic technique was proposed by the authors in February 2008 [1]. In this paper, PCT is implemented on CBC mode of operation with variable block length (VCBC mode) where initialization vector IV is of variable length. The comparative study of the technique PCT with and without VCBC mode has done on twenty files each of four different file types (.dll, .doc, .exe and .txt) with file sizes varying from 1 kB to 6.3 MB (approx.). Results are generated for comparison of PCT with and without VCBC mode with respect to encryption and decryption times, character frequencies, Chi-square values, Avalanche and Strict Avalanche values, Bit Independence values.

Keywords

PCT Session based symmetric key VCBC mode Avalanche Strict avalanche Bit independence Chi-square 

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Copyright information

© Springer India 2015

Authors and Affiliations

  • Manas Paul
    • 1
  • Jyotsana Kumar Mandal
    • 2
  • Moirangthem Marjit Singh
    • 3
  1. 1.Department of Computer ApplicationJIS College of EngineeringKalyaniIndia
  2. 2.Department of Computer Science and EngineeringKalyani UniversityKalyaniIndia
  3. 3.Department of Computer Science and EngineeringNorth Eastern Regional Institute of Science & Technology(NERIST)NirjuliIndia

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