Asymmetric Optical Scanning Holography Encryption with Elgamal Algorithm

This paper proposes an asymmetric scanning holography cryptosystem based on the Elgamal algorithm. The method encodes images with sine and cosine holograms. Subsequently, each hologram is divided into a signed bit matrix and an unsigned hologram matrix, both encrypted using the sender’s private key...

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Bibliographic Details
Published in:Photonics 2024-09, Vol.11 (9), p.878
Main Authors: Wu, Chunying, Ding, Yinggang, Yan, Aimin, Poon, Ting-Chung, Tsang, Peter Wai Ming
Format: Article
Language:English
Subjects:
Algorithms
Asymmetry
Cryptography
Data encryption
Data encryption chips
Elgamal algorithm
Encryption
Fourier transforms
Holograms
Holography
Image processing
Image transmission
Investment analysis
Lasers
Methods
optical image encryption
Scanning
security analysis
Sensitivity analysis
Signal to noise ratio
Structural stability
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Summary:This paper proposes an asymmetric scanning holography cryptosystem based on the Elgamal algorithm. The method encodes images with sine and cosine holograms. Subsequently, each hologram is divided into a signed bit matrix and an unsigned hologram matrix, both encrypted using the sender’s private key and the receiver’s public key. The resulting ciphertext matrices are then transmitted to the receiver. Upon receipt, the receiver decrypts the ciphertext matrices using their private key and the sender’s public key. We employ an asymmetric single-image encryption method for key management and dispatch for securing imaging and transmission. Furthermore, we conducted a sensitivity analysis of the encryption system. The image encryption metrics, including histograms of holograms, adjacent pixel correlation, image correlation, the peak signal-to-noise ratio, and the structural similarity index, were also examined. The results demonstrate the security and stability of the proposed method.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics11090878