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Proceedings Paper

Fractional domain asymmetric cryptosystem and cryptanalysis
Author(s): Sudheesh K. Rajput; Naveen K. Nishchal
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Paper Abstract

Most of the reported optical techniques of encryption in literature belong to the category of symmetric cryptosystems, in which the keys used for encryption are identical to the decryption keys. In an environment of network security, a symmetric cryptosystem would suffer from problems in key distribution, management, and delivery. In this paper, we present the results of an asymmetric cryptosystem that uses fractional Fourier transform domain amplitude- and phase- truncation approach. The input image/data used are gray-scale and color patterns. The conventional random phase masks are replaced with structured phase masks to further enhance the key size and hence security of cryptosystem. The scheme also uses the concept of interference and polarization selective diffractive optical element. Cryptanalysis has been carried out considering various types of attacks using phase retrieval algorithm. Numerical simulation results have been presented.

Paper Details

Date Published: 22 June 2013
PDF: 10 pages
Proc. SPIE 8769, International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013), 87691Y (22 June 2013); doi: 10.1117/12.2014375
Show Author Affiliations
Sudheesh K. Rajput, Indian Institute of Technology Patna (India)
Naveen K. Nishchal, Indian Institute of Technology Patna (India)

Published in SPIE Proceedings Vol. 8769:
International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013)
Chenggen Quan; Kemao Qian; Anand Asundi, Editor(s)

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