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Proceedings Paper

Successive encryption and transmission with phase-shifting digital holography
Author(s): Sang Keun Gil; Seok Hee Jeon; Nam Kim; Jong Rae Jeong
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Paper 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.

Paper Details

Date Published: 27 February 2006
PDF: 8 pages
Proc. SPIE 6136, Practical Holography XX: Materials and Applications, 613615 (27 February 2006); doi: 10.1117/12.645694
Show 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)


Published in SPIE Proceedings Vol. 6136:
Practical Holography XX: Materials and Applications
Hans I. Bjelkhagen; Roger A. Lessard, Editor(s)

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