文献类型：期刊文献

英文题名：An Asymmetric Image Encryption Algorithm Based on a Fractional-Order Chaotic System and the RSA Public-Key Cryptosystem

作者：Ye, Guodong[1];Jiao, Kaixin[1];Wu, Huishan[1];Pan, Chen[1];Huang, Xiaoling[1]

机构：[1]Guangdong Ocean Univ, Fac Math & Comp Sci, Zhanjiang 524088, Peoples R China

年份：2020

卷号：30

期号：15

外文期刊名：INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS

收录：SCI-EXPANDED(收录号：WOS:000599935300021)、、EI(收录号：20205109648556)、Scopus(收录号：2-s2.0-85097643738)、WOS

基金：The authors would like to thank the anonymous reviewers for their valuable comments and the editor's helpful suggestions. This work was supported in part by the National Natural Science Foundations of China (Nos. 61702116 and 61972103), the Natural Science Foundation of Guangdong Province of China (No. 2019A1515011361), the Postgraduate Education Innovation Projects of Guangdong Ocean University of China (Nos. 202031 and 201925), and the Project of Enhancing School with Innovation of Guangdong Ocean University of China (No. Q18306).

语种：英文

外文关键词：RSA; image encryption; fractional-order chaotic system; security

外文摘要：Herein, an asymmetric image encryption algorithm based on RSA cryptosystem and a fractional-order chaotic system is proposed. Its security depends on RSA algorithm. First, a pair of public and private keys is generated by RSA algorithm. Subsequently, a random message shown as plaintext key information is encrypted by the public key and RSA to achieve ciphertext key information. Next, a new transformation map is established to generate the initial key according to the ciphertext key information. Subsequently, the initial key is substituted into a fractional hyperchaotic system equation to calculate the keystream. Finally, permutation and diffusion operations are employed to encrypt a plain image to obtain the final cipher image. In the proposed algorithm, different keys for encryption and decryption are designed under an asymmetric architecture. The RSA algorithm and fractional chaotic system are combined to encrypt images; in particular, a fast algorithm for computing power multiplication is employed, which significantly improves the encryption effect and enhances the security. Simulation results show that the proposed algorithm is effective and applicable to image protection.