An approach for security of color image data in coordinate, geometric, and frequency domains. Issue 4 (1st December 2016)

• Record Type: Journal Article
• Authors: Mishra, D. C.; Sharma, R. K.
• Is Part Of: Information security journal. Volume 25:Issue 4/6(2016)
• Page Start: 213
• Page End: 234
• Publication Date: 2016-12-01
• Subjects: Cryptosystem -- discrete fractional Fourier transform -- image decryption -- image encryption -- random matrix shift cipher; Computer security -- Periodicals; Electronic data processing departments -- Security measures -- Periodicals; 005.805
• DOI: 10.1080/19393555.2016.1241323
• Languages: English
• ISSNs: 1939-3555

Abstract

ABSTRACT: This article presents a novel cryptosystem for secure transmission of color images through a coordinate cryptosystem as well as a geometric cryptosystem with time domain and frequency domain. In this technique, we have designed image encryption and decryption by a proposed random matrix shift cipher (RMSC) associated with a discrete fractional Fourier transform (DFrFT). Our proposed random matrix shift cipher is a coordinate and geometric cryptosystem for security of color image data which is completely different from existing cryptosystems for security of any data. The combination of a random matrix shift cipher and discrete fractional Fourier transform provide a robust cryptosystem for color image data in the time domain as well as the frequency domain without loss of any information. Existing techniques provide single-layer protection of color image data, but the cryptosystem presented here gives multiple layers of protection. Computer simulation on a standard example (Lena and Barbara color images) and the result are support for the robustness and appropriateness of the proposed cryptosystem.