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Quantum signal processing-based visual cryptography with unexpanded shares

[+] Author Affiliations
Surya Sarathi Das

Kalyani Government Engineering College, Department of Computer Application, Nadia, Kalyani, West Bengal 741235, India

Kaushik Das Sharma, Jitendra Nath Bera

University of Calcutta, Department of Applied Physics, Rasbehari Siksha Prangan, 92 APC Road, Kolkata, West Bengal 700009, India

Jayanta K. Chandra

Future Institute of Engineering and Management, Department of Electrical Engineering, Sonarpur Station Road, Kolkata, West Bengal 700150, India

J. Electron. Imaging. 24(5), 053026 (Oct 15, 2015). doi:10.1117/1.JEI.24.5.053026
History: Received February 17, 2015; Accepted September 9, 2015
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Abstract.  This paper proposes a visual cryptography scheme (VCS) based on quantum signal processing (QSP). VCS is an image encryption technique that is very simple in formulation and is secure. In (k,n)-VCS, a secret binary image is encoded into n share images and minimum k shares are needed to decrypt the secret image. The efforts to encrypt a grayscale image are few in number and the majority are related to grayscale to binary conversion. Thus, a generalized approach of encryption for all types of images, i.e., binary, gray, and color is needed. Here, a generic VCS is proposed based on QSP where all types of images can be encrypted without pixel expansion along with a smoothing technique to enhance the quality of the decrypted image. The proposed scheme is tested and compared for benchmark images, and the result shows the effectiveness of the scheme.

© 2015 SPIE and IS&T

Citation

Surya Sarathi Das ; Kaushik Das Sharma ; Jayanta K. Chandra and Jitendra Nath Bera
"Quantum signal processing-based visual cryptography with unexpanded shares", J. Electron. Imaging. 24(5), 053026 (Oct 15, 2015). ; http://dx.doi.org/10.1117/1.JEI.24.5.053026


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