Double image encryption scheme for iris template protection using 3D Lorenz system and modified equal modulus decomposition in hybrid transform domain

Pankaj Rakheja, Phool Singh, Rekha Vig, Ravi Kumar

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

In this paper, a double image encryption mechanism for iris template protection using 3D Lorenz chaotic system with modified equal modulus decomposition in the hybrid transform domain is proposed. The hybrid transform is produced by the combination of Walsh transform, Kekre transform and fractional Fourier transform of various orders. Here the fractional orders of the fractional Fourier transform enlarge the key-space of the proposed scheme and improve robustness against brute-force attack. The proposed scheme is asymmetric and non-linear in nature. To validate and authenticate the proposed cryptosystem, the numerical simulations have been performed on grayscale images. Results demonstrate that the proposed cryptosystem has higher robustness against noise and special attacks.

Original languageEnglish
Pages (from-to)592-605
Number of pages14
JournalJournal of Modern Optics
Volume67
Issue number7
DOIs
StatePublished - 15 Apr 2020
Externally publishedYes

Keywords

  • 3D Lorenz system
  • Hybrid transform
  • iris template
  • modified equal modulus decomposition

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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