Title :
A Parallel Encryption Algorithm for Color Images Based on Lorenz Chaotic Sequences
Author :
Wang, Ying ; Han, Chunyan ; Liu, Yuanyi
Author_Institution :
Dept. of Nucl. Power Eng., Heilongjiang Inst. of Sci. & Technol., Harbin
Abstract :
This paper presents a chaos-based encryption algorithm for colors images in spatial domain. Firstly, the pretreatment is carried out to three chaotic sequences produced by Lorenz system. Then these sequences are used to structure scrambling index matrixes. Finally, it is realized to parallel scrambling for three colors of RGB images in spatial domain. The analysis and simulation indicates the pretreated sequences have better pseudo-random characteristic. Encrypting efficiency of the algorithm is increased greatly used three sequences at one time and scrambled to 8times8 blocks of three colors. Additionally, as a result of more secret-key space than low-dimension systems, the algorithm has very strong secrecy and security
Keywords :
chaos; cryptography; data privacy; image coding; image colour analysis; Lorenz chaotic sequences; chaos-based encryption; color images; parallel encryption algorithm; parallel scrambling; pseudorandom characteristic; scrambling index matrixes; secret key; security; spatial domain; Analytical models; Autocorrelation; Chaos; Color; Cryptography; Pixel; Power engineering; Security; Space technology; Time domain analysis; Lorenz chaotic sequences; color image; parallel scrambling; pretreatment;
Conference_Titel :
Intelligent Control and Automation, 2006. WCICA 2006. The Sixth World Congress on
Conference_Location :
Dalian
Print_ISBN :
1-4244-0332-4
DOI :
10.1109/WCICA.2006.1713896
