Journal of the Optical Society of Korea

  • 제10권3호
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  • Pages.118-123
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  • 2006
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  • 1226-4776(pISSN)
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  • 2093-6885(eISSN)
한국광학회 (Optical Society of Korea)
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Error Analysis for Optical Security by means of 4-Step Phase-Shifting Digital Holography

  • Lee, Hyun-Jin (Department of Electronics Engineering, The University of Suwon) ;
  • Gil, Sang-Keun (Department of Electronics Engineering, The University of Suwon)
  • 투고 : 2006.09.11
  • 발행 : 2006.09.25
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초록

We present an optical security method for binary data information by using 4-step phase-shifting digital holography and we analyze tolerance error for the decrypted data. 4-step phase-shifting digital holograms are acquired by moving the PZT mirror with equidistant phase steps of ${\pi}/2$ in the Mach-Zender type interferometer. The digital hologram in this method is a Fourier transform hologram and is quantized with 256 gray level. The decryption performance of the binary data information is analyzed. One of the most important errors is the quantization error in detecting the hologram intensity on CCD. The greater the number of quantization error pixels and the variation of gray level increase, the more the number of error bits increases for decryption. Computer experiments show the results for encryption and decryption with the proposed method and show the graph to analyze the tolerance of the quantization error in the system.

키워드

참고문헌

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피인용 문헌

  1. 2-step Quadrature Phase-shifting Digital Holographic Optical Encryption using Orthogonal Polarization and Error Analysis vol.16, pp.4, 2012, https://doi.org/10.3807/JOSK.2012.16.4.354
  2. QPSK Modulation Based Optical Image Cryptosystem Using Phase-shifting Digital Holography vol.14, pp.2, 2010, https://doi.org/10.3807/JOSK.2010.14.2.097
  3. Dual Optical Encryption for Binary Data and Secret Key Using Phase-shifting Digital Holography vol.16, pp.3, 2012, https://doi.org/10.3807/JOSK.2012.16.3.263
  4. Optical encryption of gray-level image using on-axis and 2-f digital holography with two-step phase-shifting method vol.15, pp.4, 2008, https://doi.org/10.1007/s10043-008-0029-5
  5. 2-step Phase-shifting Digital Holographic Optical Encryption and Error Analysis vol.15, pp.3, 2011, https://doi.org/10.3807/JOSK.2011.15.3.244
  6. Optical Image Split-encryption Based on Object Plane for Completely Removing the Silhouette Problem vol.17, pp.5, 2013, https://doi.org/10.3807/JOSK.2013.17.5.384