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The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
Published on: August 12, 2013
Information authentication system using interference of two beams in gyrator transform domain.
1Department of Physics, Maulana Azad College of Engineering and Technology, Patna 801113, India. rafiq.abuturab@gmail.com
Applied Optics
|July 23, 2013
Summary
This study introduces a novel asymmetric optical interference system for information authentication using the gyrator transform (GT) domain. The method enhances cryptosystem security through unique phase and amplitude keys for secure image encryption and authentication.
Area of Science:
- Optics and Photonics
- Information Security
- Image Processing
Background:
- Traditional information authentication systems face challenges in security and implementation.
- Optical encryption methods offer potential for high security and parallel processing.
Purpose of the Study:
- To propose a novel asymmetric optical interference system for information authentication.
- To enhance the security of cryptosystems using the gyrator transform (GT) domain.
- To develop a non-iterative authentication procedure free from silhouette issues.
Main Methods:
- Input color images are decomposed into R, G, B channels.
- Complex fields are generated using inverse Fourier transform with random phase functions.
- Phase-only masks (POM) and amplitude-only masks (AOM) are derived and gyrator transformed.
- Asymmetric phase keys and encrypted images are generated via amplitude and phase truncations.
- Final encoded image produced by interference of two encrypted images.
Main Results:
- A novel asymmetric optical interference system in the gyrator transform domain is proposed.
- The system utilizes asymmetric phase keys and GT angle parameters for enhanced security.
- The authentication procedure is non-iterative and avoids the silhouette problem.
- Theoretical analysis and numerical simulations confirm the technique's validity.
Conclusions:
- The proposed system offers a secure and robust method for information authentication.
- Its architecture is suitable for both digital and optical implementation, free from misalignment issues.
- The technique provides a promising approach to advanced cryptosystems.
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