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Proceedings Article

Successive encryption and transmission with phase-shifting digital holography

[+] Author Affiliations
Sang Keun Gil

Univ. of Suwon (South Korea)

Seok Hee Jeon

Univ. of Incheon (South Korea)

Nam Kim

Chungbuk National Univ. (South Korea)

Jong Rae Jeong

Suwon Science College (South Korea)

Proc. SPIE 6136, Practical Holography XX: Materials and Applications, 613615 (February 27, 2006); doi:10.1117/12.645694
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From Conference Volume 6136

  • Practical Holography XX: Materials and Applications
  • Hans I. Bjelkhagen; Roger A. Lessard
  • San Jose, CA | January 21, 2006

abstract

We present a novel information or key encryption and transmission technique based on phase-shifting digital holography for a security system. Phase-shifting digital holography is used for recording phase and amplitude information on CCD device. 4-step phase-shifting is implemented by moving the PZT mirror with equidistant phase steps of π/2. The information and the key are converted to random phase patterns. Digital hologram in this method is Fourier transform hologram and quantized with 256 gray-level. The basic idea is that we reuse a 256 gray-level digital hologram to encrypt the information or the key with 4-step phase-shifting digital holography. The encrypted binary data/image in the form of digital hologram can be transmitted through communication network, and is reconstructed and decrypted digitally. The simulation shows that the proposed method gives good results for a successive encryption/transmission.

© (2006) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Sang Keun Gil ; Seok Hee Jeon ; Nam Kim and Jong Rae Jeong
"Successive encryption and transmission with phase-shifting digital holography", Proc. SPIE 6136, Practical Holography XX: Materials and Applications, 613615 (February 27, 2006); doi:10.1117/12.645694; http://dx.doi.org/10.1117/12.645694


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