An Asymmetric Optical Cryptosystem Using Physically Unclonable Functions in the Fresnel Domain †

Vinny Cris Mandapati, Shashi Prabhakar, Harsh Vardhan, Ravi Kumar, Salla Gangi Reddy, Sakshi, Ravindra P. Singh

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

In this paper, we propose a new asymmetric cryptosystem for phase image encryption, using the physically unclonable functions (PUFs) as security keys. For encryption, the original amplitude image is first converted into a phase image and modulated with a PUF to obtain a complex image. This complex image is then illuminated with a plane wave, and the complex wavefront at a distance d is recorded. The real part of the complex wavefront is further processed to obtain the encrypted image and the imaginary part is kept as the private key. The polar decomposition approach is utilized to generate two more private security keys and to enable the multi-user capability in the cryptosystem. Numerical simulations confirm the feasibility of the proposed method.

Original languageEnglish
Article number8
JournalEngineering Proceedings
Volume34
Issue number1
DOIs
StatePublished - 1 Jan 2023
Externally publishedYes

Keywords

  • asymmetric cryptosystems
  • physically unclonable functions
  • polar decomposition method

ASJC Scopus subject areas

  • Biomedical Engineering
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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