Chaos-based encryption for fractal image coding

doi:10.1088/1674-1056/21/1/010502

中国物理B ›› 2012, Vol. 21 ›› Issue (1): 10502-010502.doi: 10.1088/1674-1056/21/1/010502

Chaos-based encryption for fractal image coding

袁正雄, 黄国和

Department of Electronic Engineering, City University of Hong Kong, Hong Kong, China

收稿日期:2011-07-25 修回日期:2011-08-18 出版日期:2012-01-15 发布日期:2012-01-20
基金资助:
Project supported by the Research Grants Council of the Hong Kong Special Administrative Region, China (Grant No. CityU 123009).

Chaos-based encryption for fractal image coding

Yuen Ching-Hung(袁正雄)^† and Wong Kwok-Wo(黄国和)

Department of Electronic Engineering, City University of Hong Kong, Hong Kong, China

Received:2011-07-25 Revised:2011-08-18 Online:2012-01-15 Published:2012-01-20
Supported by:
Project supported by the Research Grants Council of the Hong Kong Special Administrative Region, China (Grant No. CityU 123009).

摘要/Abstract

摘要： A chaos-based cryptosystem for fractal image coding is proposed. The Rényi chaotic map is employed to determine the order of processing the range blocks and to generate the keystream for masking the encoded sequence. Compared with the standard approach of fractal image coding followed by the Advanced Encryption Standard, our scheme offers a higher sensitivity to both plaintext and ciphertext at a comparable operating efficiency. The keystream generated by the Rényi chaotic map passes the randomness tests set by the United States National Institute of Standards and Technology, and so the proposed scheme is sensitive to the key.

关键词: chaos, cryptography, joint image compression and encryption;fractal image coding

Abstract: A chaos-based cryptosystem for fractal image coding is proposed. The Rényi chaotic map is employed to determine the order of processing the range blocks and to generate the keystream for masking the encoded sequence. Compared with the standard approach of fractal image coding followed by the Advanced Encryption Standard, our scheme offers a higher sensitivity to both plaintext and ciphertext at a comparable operating efficiency. The keystream generated by the Rényi chaotic map passes the randomness tests set by the United States National Institute of Standards and Technology, and so the proposed scheme is sensitive to the key.

Key words: chaos, cryptography, joint image compression and encryption;fractal image coding

中图分类号: (Nonlinear dynamics and chaos)

05.45.-a

05.45.Gg (Control of chaos, applications of chaos) 05.45.Df (Fractals)

袁正雄, 黄国和. Chaos-based encryption for fractal image coding[J]. 中国物理B, 2012, 21(1): 10502-010502.

Yuen Ching-Hung(袁正雄) and Wong Kwok-Wo(黄国和) . Chaos-based encryption for fractal image coding[J]. Chin. Phys. B, 2012, 21(1): 10502-010502.

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Chaos-based encryption for fractal image coding

Chaos-based encryption for fractal image coding

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