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Digital Images Encryption in Frequency Domain Based on DCT and One Dimensional Cellular Automata

  • Ahmad Pahlavan Tafti
  • Safoura Janosepah
Part of the Communications in Computer and Information Science book series (CCIS, volume 251)

Abstract

We are living in an age where security of digital information like digital images is becoming more important in many aspects and the tranmission of digital images is increasing over the internal and international computer networks. The protection of digital images from unauthorized access is the main purpose of this paper.

This paper introduced an approach to encrypt a digital image in frequency domain through DCT (Discrete Cosine Transform) and one dimenssional cellular automata. It is based on encryption of some quantified DCT coefficient in high frequencies. We applied our proposed model on one hundred numbers of JPEG grayscale images of size 800 × 800. The experimental results have indicated the robustness of our algorithm.

Keywords

Digital Images Encryption Frequency Domain Encryption Cellular Automata 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Ahmad Pahlavan Tafti
    • 1
  • Safoura Janosepah
    • 1
  1. 1.Majlesi BranchIslamic Azad UniversityIsfahanIran

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