학술논문
基于频域压缩和二维离散混沌的图像加密方案 / Image Encryption Scheme Based on Frequency Domain Compression and 2D Discrete Chaos
Document Type
Academic Journal
Author
Source
计算技术与自动化 / Computing Technology and Automation. 42(4):110-116
Subject
Language
Chinese
ISSN
1003-6199
Abstract
针对数字图像加密安全与效率的矛盾性问题,提出了一个基于二维离散超混沌和频域压缩的数字图像加密方案.首先,通过对图像分块得到图像矩阵,并将其转换成频域矩阵.然后在密钥的驱动下,使用超混沌系统对频域矩阵进行加密,使其具有很高的安全性和随机性.接下来,采用哈达玛变换对加密后的频域矩阵进行变换,进一步增强加密的安全性.最后,采用压缩编码技术对加密后的矩阵进行压缩,达到减小传输数据量的目的.实验结果表明,提出的图像加密方案具有很高的加密强度和安全性,在保证加密效率和图像质量的前提下,减小了传输数据的大小,提高了传输效率.同时,该方案具有较强的鲁棒性,能够抵御各种攻击,具有良好的应用前景.
Aiming at the contradiction between security and efficiency of digital image encryption,this paper proposes a digital image encryption scheme based on two-dimensional discrete hyperchaos and frequency domain compression.First,the image matrix is obtained by dividing the image and converting it into a frequency domain matrix.Then,driven by the key,a hyperchaotic system is used to encrypt the frequency domain matrix,making it highly secure and random.Next,the Had-ama transform is used to transform the encrypted frequency domain matrix,which further enhances the security of encryp-tion.Finally,the compression coding technology is used to compress the encrypted matrix,which achieves the purpose of reducing the amount of transmitted data.Experimental results show that the image encryption scheme proposed in this paper has high encryption strength and security,and reduces the size of transmitted data and improves transmission efficiency un-der the premise of ensuring encryption efficiency and image quality.At the same time,the scheme has strong robustness,can resist various attacks,and has good application prospects.
Aiming at the contradiction between security and efficiency of digital image encryption,this paper proposes a digital image encryption scheme based on two-dimensional discrete hyperchaos and frequency domain compression.First,the image matrix is obtained by dividing the image and converting it into a frequency domain matrix.Then,driven by the key,a hyperchaotic system is used to encrypt the frequency domain matrix,making it highly secure and random.Next,the Had-ama transform is used to transform the encrypted frequency domain matrix,which further enhances the security of encryp-tion.Finally,the compression coding technology is used to compress the encrypted matrix,which achieves the purpose of reducing the amount of transmitted data.Experimental results show that the image encryption scheme proposed in this paper has high encryption strength and security,and reduces the size of transmitted data and improves transmission efficiency un-der the premise of ensuring encryption efficiency and image quality.At the same time,the scheme has strong robustness,can resist various attacks,and has good application prospects.