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Photorefractive holographic moiré-like patterns for secure numerical code generation.

G N de Oliveira¹, M E Oliveira, P A M dos Santos

¹Laboratório de Mecânica Teórica e Aplicada, Departamento de Engenharia Mecânica, Universidade Federal Fluminense, Niterói, RJ, Brazil.

|March 19, 2013

Summary

This study introduces secure optical numerical codes generated using photorefractive holographic moiré fringe patterns. These patterns offer a robust and highly secure method for data storage and transmission.

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Area of Science:

Optics and Photonics
Crystallography
Information Security

Background:

Holographic techniques offer unique properties for data encoding.
Photorefractive crystals provide a versatile medium for holographic applications.
Moiré fringe patterns can be generated by superposing gratings.

Purpose of the Study:

To propose photorefractive holographic moiré fringe patterns as secure numerical code generators.
To explore their application in secure data storage and transmission.
To establish an optical numerical base for data representation.

Main Methods:

Holographically superimposing sinusoidal gratings with slightly different pitches.
Utilizing a Bismuth Titanate (Bi(12)TiO(20)) photorefractive crystal.

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Defining an optical numerical base with patterns representing digits 0, 1, and -1 as bits.

Main Results:

Dynamic moiré fringe patterns were successfully generated and utilized as optical bits.
These bits were combined to form bytes, representing numerical sequences.
The generated numerical code demonstrated simplicity, robustness, and high security.

Conclusions:

Photorefractive holographic moiré fringe patterns are a viable method for secure numerical code generation.
The proposed method is suitable for robotic vision identification and secure data handling.
This technique presents potential for advanced data storage and transmission security.