6. Speckle Coding for Optical and Digital Data Security Applications

  1. Prof. Guillermo H. Kaufmann3,4
  1. Arvind Kumar1,
  2. Madan Singh2 and
  3. Kehar Singh1

Published Online: 21 FEB 2011

DOI: 10.1002/9783527633852.ch6

Advances in Speckle Metrology and Related Techniques

Advances in Speckle Metrology and Related Techniques

How to Cite

Kumar, A., Singh, M. and Singh, K. (2011) Speckle Coding for Optical and Digital Data Security Applications, in Advances in Speckle Metrology and Related Techniques (ed G. H. Kaufmann), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, Germany. doi: 10.1002/9783527633852.ch6

Editor Information

  1. 3

    Instituto de Fisica Rosario, Universidad Nacional de Rosario, Facultad de Ciencias Exactas e Ingeniería, Department of Physics and Centro Internacional Franco Argentino de Ciencias, de la Información y de Sistemas, Rosario, Argentina

  2. 4

    Instituto de Fisica Rosario, Blvd. 27 de Febrero 210 bis, S2000EZP Rosario, Argentina

Author Information

  1. 1

    Indian Institute of Technology Delhi, Department of Physics, Hauz Khas, New Delhi 110016, India

  2. 2

    Instruments Design, Development and Facility Centre, Staff Road, Ambala 133001, India

Publication History

  1. Published Online: 21 FEB 2011
  2. Published Print: 23 FEB 2011

ISBN Information

Print ISBN: 9783527409570

Online ISBN: 9783527633852

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Keywords:

  • aperture system;
  • digital data security;
  • double random phase encoding (DRPE) method;
  • optical data security;
  • sandwich phase mask;
  • speckle coding techniques

Summary

This chapter describes certain speckle coding techniques for optical and digital data security applications. It reviews various optical encryption and decryption methods. To make the optical data more secure, double random patterns may be used. In the double random phase encoding (DRPE) method, two statistically independent random phase masks are used for encryption, one in the input plane and another in the Fourier plane of a 4-f imaging setup. These have been used as a coding tool for storing data. The chapter provides the results of investigation of an encryption technique using phase image for encryption and a sandwich phase mask made by using elongated speckle patterns as the key. It also provides the results of multiplexing in optical encryption of two dimensional (2D) images using an aperture system in the Fourier plane of a DRPE system.

Controlled Vocabulary Terms

encoding; security of data; speckle