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Proceedings Paper

Optical threshold generator for stream cipher systems
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Paper Abstract

In this paper, we propose a new optical threshold generator as a key-stream generator for stream cipher systems. To implement the threshold generator optically, we use conventional twisted nematic type SLMs. This proposed system is based on the shadow casting technique for the AND operation between taps and register stages. It is also based on the proposed PMRS method for modular 2 addition. The proposed PMRS method uses the property of light's polarization on liquid crystal device (LCD) and can be implemented optically using one LCD and some mirrors. One of the major advantages of the proposed system is that there is no limitation of the number of the programmable tapping points. Therefore, this system can be used for high-security applications. Also, the proposed system can be applied for the 2D encryption system which processes large amounts of data such as 2D images. We verify the proposed system with some simulations.

Paper Details

Date Published: 24 October 1997
PDF: 7 pages
Proc. SPIE 3159, Algorithms, Devices, and Systems for Optical Information Processing, (24 October 1997); doi: 10.1117/12.279447
Show Author Affiliations
JongWook Han, Electronics and Telecommunications Research Institute (South Korea)
Seung-Hyun Lee, Kwangwoon Univ. (South Korea)
Eun-Soo Kim, Kwangwoon Univ. (South Korea)

Published in SPIE Proceedings Vol. 3159:
Algorithms, Devices, and Systems for Optical Information Processing
Bahram Javidi; Demetri Psaltis, Editor(s)

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