An image encryption scheme based on precision limited chaotic system

Hao Li, Lianbing Deng, Zhaoquan Gu

Abstract: In recent years, various chaotic maps have been used for image encryption. However, most of these image encryption algorithms entail a lot of floating-point operations, which slows encryption and increases the difficulty of hardware implementation. In this paper, a 32-bit precision limited piecewise linear & logistic chaotic map called 32-bit PL_PWL&LCM for short is proposed. The proposed system has excellent chaotic characteristics, is easy to realize and does not require long time for initialization. Based on the 32-bit PL_PWL&LCM, an image encryption system is proposed. Security analysis indicates that the proposed IES is robust against statistical attacks, differential attacks and brute force attacks with just one round of encryption. Performance analysis shows that the IES is a fast encryption algorithm with good performance in resisting noise disturbances.