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Optical and Quantum Electronics
Erschienen in: Optical and Quantum Electronics 11/2016

01.11.2016

Asymmetric cryptosystem using coherent superposition and equal modulus decomposition of fractional Fourier spectrum

verfasst von: Sonam Palden Barfungpa, Muhammad Rafiq Abuturab

Erschienen in: Optical and Quantum Electronics | Ausgabe 11/2016

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Abstract

A new asymmetric cryptosystem based on coherent superposition and equal modulus decomposition of fractional Fourier spectrum is proposed. In this method, each channel of the color image is normalized, modulated by random phase function, and subsequently fractional Fourier transformed. The transformed image is divided into two masks with equal moduli. The two masks are independently fractional Fourier transformed and then phase- and amplitude truncated to get corresponding encrypted images and decryption (/private) keys. The fractional orders and decryption keys strengthen the security of the proposed structure significantly. The proposed system can resist known-plaintext and known-public key attacks (specific attack). The encryption process is realized digitally while the decryption can be implemented optically or digitally. A set of simulation results shows the validity of proposed cryptosystem.
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Metadaten
Titel
Asymmetric cryptosystem using coherent superposition and equal modulus decomposition of fractional Fourier spectrum
verfasst von
Sonam Palden Barfungpa
Muhammad Rafiq Abuturab
Publikationsdatum
01.11.2016
Verlag
Springer US
Erschienen in
Optical and Quantum Electronics / Ausgabe 11/2016
Print ISSN: 0306-8919
Elektronische ISSN: 1572-817X
DOI
https://doi.org/10.1007/s11082-016-0786-5

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