Hardware stream cipher with controllable chaos generator for colour image encryption

Author

Barakat, Mohamed L. ; Mansingka, Abhinav S. ; Radwan, A.G. ; Salama, Khaled N.

Author_Institution

Dept. of Electr. Eng. Program, King Abdullah Univ. of Sci. & Technol. (KAUST), Thuwal, Saudi Arabia

Volume

8

Issue

1

fYear

2014

fDate

Jan-14

Firstpage

33

Lastpage

43

Abstract

This study presents hardware realisation of chaos-based stream cipher utilised for image encryption applications. A third-order chaotic system with signum non-linearity is implemented and a new post processing technique is proposed to eliminate the bias from the original chaotic sequence. The proposed stream cipher utilises the processed chaotic output to mask and diffuse input pixels through several stages of XORing and bit permutations. The performance of the cipher is tested with several input images and compared with previously reported systems showing superior security and higher hardware efficiency. The system is experimentally verified on XilinxVirtex 4 field programmable gate array (FPGA) achieving small area utilisation and a throughput of 3.62 Gb/s.

Keywords

cryptography; field programmable gate arrays; image colour analysis; XORing; Xilinx Virtex 4 FPGA; bit permutations; chaotic sequence; colour image encryption; controllable chaos generator; hardware stream cipher;

fLanguage

English

Journal_Title

Image Processing, IET

Publisher

iet

ISSN

1751-9659

Type

jour

DOI

10.1049/iet-ipr.2012.0586

Filename

6704486