提出了一种基于四值混沌阵列的数字图像加密算法。
This paper presents a digital image encryption algorithm based on four-value chaotic array.
提出了一种基于混沌理论和循环移位的图像加密算法。
A kind of image encryption algorithm is presented based on chaos theory and cycle shift.
提出基于随机区域移位和随机像素映射的图像加密算法。
Based on region shifting encoding and pixel mapping, the paper proposes image encryption algorithm.
理论分析和实验结果均表明该图像加密算法是不安全的。
From the analysis in theory and experimental results, this image encryption algorithm is proved insecure.
提出了一种基于复合离散混沌系统的对称图像加密算法。
In this paper, a symmetric image encryption scheme based on composite discrete chaotic system is presented.
提出了一种新的基于混沌映射与排序变换的图像加密算法。
Proposed a new algorithm of images scrambling based on the chaotic mapping and sort transformation.
利用拉伸和折叠的原理，提出了一种可逆映射集合的图像加密算法。
Utilizing the stretch and fold mechanism, an invertible map set based image encryption algorithm is proposed.
流密码与分组密码是基于位运算的图像加密算法中两种主要密码体制。
Stream cipher and block cipher are main cipher systems in image encryption algorithm based on bit operation.
最后利用这些参数对图像加密算法进行了模拟实验分析及安全性评价。
At last using the parameters, the algorithm of image encryption is tested and the safety of the algorithm is evaluated.
在此基础上，利用混沌图像的混沌特性，提出了一种实用的图像加密算法。
And based on those, a practical image encryption algorithm was put forward according to the characteristics of chaotic images.
另外我们采用多图像中心频谱平移和双随机位相编码提出了一种多图像加密算法。
Also we proposed a multiple image encryption scheme by shifting the multiple central parts of spectra together with the double random phase encodingtechnique.
基于级联空间混沌系统的选择图像加密算法是在将上述算法结合选择图像加密后提出的。
We combine the above algorithm with selective image encryption and propose a selective image encryption based on couple chaotic systems.
本文首先对现有图像加密算法入行总结，剖析了这些算法的长处及其不适合图像加密的原因。
First, this thesis summarizes the current image's encryption algorithm, analyzes these algorithm's merit and the cause of inconformity for images of encryption.
混沌映射所具有的初值敏感性和随机性，使得基于混沌理论的图像加密算法成为一个研究热点。
The initial sensitivity and randomness of the chaotic map make the image encryption algorithm based on chaotic theory become a hot researching field recently.
针对现有基于混沌序列的图像加密算法的缺陷，提出一种基于不放回抽样的图像混沌加密算法。
Aiming at defects which are exiting in image encryption algorithm based on chaotic sequences, this paper proposes an image chaotic encryption algorithm based on sampling without replacement.
同时，该算法满足格式兼容性并具有一定的容错能力，适合作为基于网络传输的图像加密算法。
Moreover, it is format compatible and robust to transmission errors. All the attributes mentioned above make this algorithm suitable to be the encryption approach for image transmission.
考虑到图像数据量大的特点，传统加密算法无法满足系统要求，我们提出了一种基于混沌序列的图像加密算法。
Considering the characteristic of huge image data, traditional encryption algorithm can't satisfy system's demand, so we bring forward a image encryption algorithm based on chaotic sequences.
接着，就混沌理论和混沌加密算法进行研究，对其中的部分算法进行了仿真，通过分析，寻找出现有混沌图像加密算法存在的一些不足。
Then, we study chaos theory and the algorithm, take a part of algorithm for simulation, find out the shortage of images encryption algorithm.
讨论了一种以实数值混沌序列为基础，利用加密模板矩阵和排序变换，给出一种灰度图像的加密算法。
In this paper, a gray image encryption arithmetic based on chaotic sequences is proposed by taking advantage of the encryption template matrix and sort transformation.
将基于混沌的加密算法应用到数字图像加密中。
Then an encryption algorithm based on chaos has been proposed and a file-encryption system is developed.
通过对BMP图像数据位的读写分析，结合公文流转的特点以及MD5加密算法，实现用户对电子公文的加盖公章操作。
Through the read-write analysis of BMP data bit, and combining the document transmission characteristic and MD5 encryption algorithm, electronic document stamping is realized by user.
介绍了实现CCSDS图像压缩算法和AES加密算法的FPGA设计所选择的软件开发工具、开发语言和硬件开发平台。
Presented software developing tools, developing language and hardware developing platform for FPGA design of CCSDS image compression and AES encryption algorithm.
为了使图像保密性更好，提出一种新的加密算法。
In order to increase the security performance, a novel encrypt algorithm is proposed.
通过实验表明：加密算法能对图像进行有效的加密，得出最佳的参数以达到最好的图像加密效果。
Experiments show that, encryption algorithm can effectively encrypt images and obtain the best parameters to achieve the best image encryption effect.
摘要：为了提高图像的加密效果和加密效率，给出一种新的图像置乱加密算法。
Absrtact: To improve the effect and the speed of image encryption, a new image encryption algorithm is presented.
在这一过程中，不但要考虑加密算法的安全性，还需要考虑加密算法对码率的影响，以及图像传输的实时性要求。
Not only the security of algorithm, but also the compression efficiency and encryption complexity should be taken into consideration when design an encryption scheme.
在这一过程中，不但要考虑加密算法的安全性，还需要考虑加密算法对码率的影响，以及图像传输的实时性要求。
Not only the security of algorithm, but also the compression efficiency and encryption complexity should be taken into consideration when design an encryption scheme.
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