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International Conference on Systems and Informatics (ICSAI)

Promoting a Hybrid Cryptosystem System’s Security based on Fresnel lens and RSA Algorithm

Peng Yang, Weishun Xue, Chenqi Fan, Xiaojian Xue

Published Dec 10, 2022• 2 citations
Publisher

Abstract

with the growing concerns of the current network security, development of hybrid cryptosystem based on the combination of optical symmetric cryptography and public key cryptography has aroused considerable research interest. In optical symmetry system, a new method for encrypting optical information using Fresnel lenses is proposed. The symmetry system’s keys include the focal length (f) and propagation wavelength ($\lambda$). Then, in public key cryptography, the key ($\lambda$,J) is encrypted by the RSA algorithm. Finally, we have implemented and result have been obtained using 12-level digital Fresnel lens by COMSOL Multiphysics to study of how the optical image deciphered the information using encryption keys. In addition, the main challenges and future prospects for the further development of hybrid cryptosystem system are discussed.

DOI
10.1109/icsai57119.2022.10005357

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with the growing concerns of the current network security, development of hybrid cryptosystem based on the combination of optical symmetric cryptography and public key cryptography has aroused considerable research interest. In optical symmetry system, a new method for encrypting optical information using Fresnel lenses is proposed. The symmetry system’s keys include the focal length (f) and propagation wavelength (λ\lambdaλ). Then, in public key cryptography, the key (λ\lambdaλ,J) is encrypted by the RSA algorithm. Finally, we have implemented and result have been obtained using 12-level digital Fresnel lens by COMSOL Multiphysics to study of how the optical image deciphered the information using encryption keys. In addition, the main challenges and future prospects for the further development of hybrid cryptosystem system are discussed.
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A hybrid cryptosystem is proposed, in which one image is encrypted to two interferograms with the aid of double random-phase encoding (DRPE) and two-step phase-shifting interferometry (2-PSI), then three pairs of public–private keys are utilized to encode and decode the session keys (geometrical parameters, the second random-phase mask) and interferograms. In the stage of decryption, the ciphered image can be decrypted by wavefront reconstruction, inverse Fresnel diffraction, and real amplitude normalization. This approach can successfully solve the problem of key management and dispatch, resulting in increased security strength. The feasibility of the proposed cryptosystem and its robustness against some types of attack are verified and analyzed by computer simulations.
Abstract This paper is all about making digital communication more secure by combining quantum technology with traditional encryption methods. Normally, we use algorithms like RSA and AES to encrypt messages, but with the increase of quantum technology, those methods might not be safe enough in the future. So, in this system, we’ve used something called the BB84 quantum cryptography key distribution protocol, when using the law of quantum physics to securely create keys for encryption. These keys are then used in RSA and AES to encrypt and decrypt messages, making the communication extremely secure. We’ve also built a simple graphical interface where users can generate keys, encrypt/decrypt messages, and even see visual graphs comparing the performance of our hybrid system with standalone AES and RSA. Overall, this paper shows how we can build a future-proof secure communication system by blending classical cryptography with quantum concepts in a practical and user-friendly way.
In the modern era, the secure transmission and storage of information are among the utmost priorities. Optical security protocols have demonstrated significant advantages over digital counterparts, i.e., a high speed, a complex degree of freedom, physical parameters as keys (i.e., phase, wavelength, polarization, quantum properties of photons, multiplexing, etc.) and multi-dimension processing capabilities. This paper provides a comprehensive overview of optical cryptosystems developed over the years. We have also analyzed the trend in the growth of optical image encryption methods since their inception in 1995 based on the data collected from various literature libraries such as Google Scholar, IEEE Library and Science Direct Database. The security algorithms developed in the literature are focused on two major aspects, i.e., symmetric and asymmetric cryptosystems. A summary of state-of-the-art works is described based on these two aspects. Current challenges and future perspectives of the field are also discussed.
Abstract We present an optical encryption approach based on the combination of fractal Fresnel lens (FFL) and fractional Fourier transform (FrFT). Our encryption approach is in fact a four-fold encryption scheme, including the random phase encoding produced by the Gerchberg–Saxton algorithm, a FFL, and two FrFTs. A FFL is composed of a Sierpinski carpet fractal plate and a Fresnel zone plate. In our encryption approach, the security is enhanced due to the more expandable key spaces and the use of FFL overcomes the alignment problem of the optical axis in optical system. Only using the perfectly matched parameters of the FFL and the FrFT, the plaintext can be recovered well. We present an image encryption algorithm that from the ciphertext we can get two original images by the FrFT with two different phase distribution keys, obtained by performing 100 iterations between the two plaintext and ciphertext, respectively. We test the sensitivity of our approach to various parameters such as the wavelength of light, the focal length of FFL, and the fractional orders of FrFT. Our approach can resist various attacks.