系统工程与电子技术 ›› 2023, Vol. 45 ›› Issue (12): 4040-4051.doi: 10.12305/j.issn.1001-506X.2023.12.35
• 通信与网络 • 上一篇
唐辰1, 涂喜梅2, 陆晓刚2, 张琦1, 张小贝1,*
收稿日期:
2022-10-28
出版日期:
2023-11-25
发布日期:
2023-12-05
通讯作者:
张小贝
作者简介:
唐辰(1998—), 男, 硕士研究生, 主要研究方向为图像压缩加密、航空安全通信基金资助:
Chen TANG1, Ximei TU2, Xiaogang LU2, Qi ZHANG1, Xiaobei ZHANG1,*
Received:
2022-10-28
Online:
2023-11-25
Published:
2023-12-05
Contact:
Xiaobei ZHANG
摘要:
针对高级加密标准(advanced encryption standard, AES)用于图像加密安全性不高、密钥空间小等问题, 提出一种基于四维混沌系统的改进AES图像加密算法。密钥由四维混沌系统得到, 通过在Lorenz-Chen-Lu混沌中引入非线性项、反馈控制器等提升了混沌复杂度, 经过动力学特性、稳定性分析, 验证了其混沌特性。加密时, 使用混沌Cubic-S盒和动态交叉变换的方法对传统AES进行了改进。同时, 对密钥扩展函数进行了修改, 使得每一轮密钥与上两轮密钥有关, 并将混沌序列引入其中, 提升了密钥的安全性。该算法的密钥空间达2476, 密文图像信息熵为7.997 7 bits, 像素数变化率和统一平均变化强度分别为99.613%和33.473%, 像素间相关性接近于0, 加密速度为45.85 Mbits/s。仿真结果表明, 密钥具有良好的敏感性, 加密算法具有良好的安全性和鲁棒性, 能实现快速加密和有效抵抗各类攻击。
中图分类号:
唐辰, 涂喜梅, 陆晓刚, 张琦, 张小贝. 基于四维混沌系统的改进AES图像加密算法[J]. 系统工程与电子技术, 2023, 45(12): 4040-4051.
Chen TANG, Ximei TU, Xiaogang LU, Qi ZHANG, Xiaobei ZHANG. Improved AES image encryption algorithm based on four-dimensional chaotic system[J]. Systems Engineering and Electronics, 2023, 45(12): 4040-4051.
表4
NPCR与UACI的参数对比"
算法 | 参数 | Cameraman | Lena | Boat |
本文算法 | NPCR | 99.613 | 99.604 | 99.608 |
UACI | 33.459 | 33.460 | 33.473 | |
传统AES | NPCR | 99.588 | 99.544 | 99.646 |
UACI | 33.556 | 33.489 | 33.488 | |
文献[ | NPCR | 99.604 | 99.615 | 99.611 |
UACI | 33.566 | 33.455 | 33.499 | |
文献[ | NPCR | 99.628 | 99.604 | 99.605 |
UACI | 33.503 | 33.460 | 33.497 | |
文献[ | NPCR | 99.626 | 99.675 | 99.578 |
UACI | 33.215 | 33.458 | 33.264 |
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