密钥空间

通过电视广播，每台设备都分配了一个密钥空间进行分析。

Over the airwaves , each appliance would be assigned a small piece of the keyspace to analyze .

一种基于混沌映射的DES密钥空间拓展方法

Expanding DES key space method based on chaotic maps

关于Hill密码密钥空间大小的计算

On the Computation of the Key Space of Hill Cipher

与Baker和Cat映射相比，Standard映射具有更大的密钥空间，更适合于信息加密。

Compared to Baker map and Cat map , Standard map has larger key space , which makes it more suitable for information encryption .

一个加/解密系统由明文空间、密文空间、密码方案和密钥空间组成，本文采用了IDEA和RC5算法为样本设计加/解密系统。

A cryptographic system includes data , algorithms and key .

DES作为传统分组密码算法的典型代表，存在密钥空间太小的致命弱点，在穷举密钥攻击下被破译。

As the representative of tradition block encryption algorithm , DES has a deadly weakness that is too small key space to prevent exhaust attacks .

利用猫映射及Lorenz高维混沌系统的结构复杂、多输出、密钥空间大等优点，提出一种基于猫映射与Lorenz混沌系统相结合的图像加密算法。

The high-dimensional , such as cat map , Lorenz chaotic system , has complex structure , multi-output , and large key space .

相对普通混沌序列，二值序列能进一步扩大密钥空间；改进的Baker映射将图像的尺寸扩展到了一般矩形。

Binary sequences can further expand the key space relative to ordinary chaotic sequence . Improved Baker mapping can expand the size of the image to general rectangle .

与二维映射相比，扩展后的三维Baker映射具有更大的密钥空间、更快的混迭速度和更广的应用范围。

Compared to 2D Baker map , the extended 3D Baker map has much larger key space , much faster mixing speed and much wider applications such as the encryption of images , videos or multi-spectral image sequences .

针对DES密钥空间过小而不能抵抗穷举攻击的问题，本文给出了一种基于混沌映射的密钥空间拓展方法，从而构造了一种混沌DES变形算法。

In the second , to arm at the problem that the key space of DES is too small to prevent exhaust attacks , an expanding key space method is proposed , and a chaotic transformed DES algorithm is constructed .

密钥空间拓展方法基于三条原理：Shannon的一次一密，无限密钥空间及混沌映射系统可构造一个确定性的随机数发生器。

The expanding key space method is based on 3 principles of the Shannon 's idea " one-time pad ", " infinite key space " and a chaotic system can make out of a determinate random number generator .

该加密方案具有1076的密钥空间，能够有效地应用于网络通讯。

Numerical simulations reveal that the scheme is effective in network communication .

因此我们的分析中对子密钥空间进行了更为细致的分割。

So all the subkey space is divided more thoroughly than in differential cryptanalysis .

本文是针对扩展加密密钥空间而进行的优化数据加密算法的研究。

This research is an encryption key for expansion space for the optimization of data encryption algorithm .

对该加密方案的密钥空间、密钥参数敏感性分析表明，该加密方案具有较高的安全性。

The scheme is sensitive to perturbations of the parameters and initial conditions of the chaos system .

其中提出的混沌序列排序算法不仅提供的密钥空间大，而且置乱位置的随机性好，位置分布均匀。

The permutation algorithm is provided with big secret key space , well randomicity and uniform distribution .

就搜索时间来看，此方法把密钥空间的大小由2~（56）下降到2~（54）。

From the view point of searching time , this method lessens the key space from 256 to 254 .

与传统的换位加密相比，新方案不仅有较大的密钥空间，而且产生的换位序列具有很强的随机性。

Compare with traditional transposition ciphers , the new scheme had larger key space and the transposition sequences are stochastic .

由于时空二维混沌具有密钥空间大、参数敏感性的特点，该算法具有很高的安全性。

Because the spatiotemporal chaos system has huge key space and was sensitive to the initial parameter , this method shows great security .

结果表明，所提方法具有较大的密钥空间，很好的单向性，初值和密钥敏感性。

The experimental results show that this method has large key space , strong one-way property , and sensitivity to the initial conditions and keys .

该算法有加密速度快、易于计算机实现、密钥空间大等优点。

The advantages of this algorithm were , rapidity of encryption , carried out easily by computer , ampliative secret key space and so on .

通过时于嵌入的水印进行混沌调制和置乱，并扩展密钥空间，有效地改进了算法的安全性。

The security of the scheme is effectively improved by using chaotic modulation and permutation to the embedded watermark and making a expansion for the key space .

说明了他们在某一安全水平下用户密钥空间的大小，并给出了前一类认证系统的具体构造。

It shows the size of the secret key space for each participant under the security level , provides the construction about authentication schemes for dynamic conferences .

该算法输出序列随机性更好，不仅没有空白窗口和稳定窗口，而且分布更均匀，同时密钥空间也大幅提高。

The sequence created by this algorithm has better randomness without blank window and stable window . Furthermore , it has better uniform distribution and larger key space .

随后本文从密钥空间、密钥敏感性、明文敏感性、统计特性等几个方面对提出的两种算法进行了安全性分析。

Subsequently , security analysis has been made for the proposed algorithms from the aspects of key space , key sensitivity , plaintext sensitivity , and statistical property .

和一维元胞自动机相比，采用二维元胞自动机的加密算法拥有更大的密钥空间，系统安全性大大增强。

Compared with one-dimensional cellular automata , encryption algorithm based on two-dimensional cellular automata has a larger key space and the security of the system is greatly enhanced .

文章利用理想的多密共享体制，来构作一类不完备的秘密共享体制，使它具有很小的子密钥空间和充分大的密钥空间两方面的优点。

In this paper the authors present a method of constructing a class of non-perfect secret sharing schemes , by making a change of an ideal multi-secret sharing scheme .

然后，对算法的密钥空间大小、密钥敏感性、明文图像敏感性、明文密文直方图等方面对其进行了仿真实验和分析。

The key space of this algorithm as well as key sensitivity , plain-text image sensitivity , plain histogram , cipher histogram and so on is simulated and analyzed .

该方案定义了一种复合混沌系统，并给出了该复合混沌系统的密钥空间、随机复杂度及抗预测能力分析。

The scheme develops a kind of composite chaos and gives the analysis of key space , randomicity and complexity , and the ability against prediction for composite chaos .

文中对算法进行了详细的性能指标分析，结果表明：该算法密钥空间巨大，可以有力地抵抗选择明文、密文攻击。

The algorithm has a large space of the key , which can be proven by detailed analysis of the performance index , and can withstand chosen-text / cipher attack .