permutation cipher 中文意思是什麼
permutation cipher
解釋
置換密碼- permutation : （數學中）排列變化，徹底改變
- cipher : n 1 零〈即0〉。2 數碼，阿拉伯數字。3 暗號，暗碼，密碼；密碼索引 （＝cipher key）。4 （姓名首字母...
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Des is a block cipher. that means it operates on plain text blocks of a given size nominally 64 bits and returns cipher text blocks of the same size. so, des results in a permutation among the 264 possible arrangements of 64 bits, each of which may be either 0 or 1
據報道，通過合併一個稱為nettop的商業產品， nsa將使用運行se linux的一臺計算機來替代一些在物理上分隔的計算機（這意味著操作安全性的「空隙」方法- -將物理上分隔的系統區分成不同的安全性級別） （請參閱 -
On the other hand, the cipher systems can be seen as a permutation systems under the controlling of key
另一方面，由於密碼系統數學上可以看成是一個在密鑰控制下的置換映射。 -
The results obtained in this thesis offers some new ideas and methods for studying of permutation theory in block cipher system
上述工作為分組密碼中置換理論的研究提供了新的方法、新的思路，並得到了一批好的置換源。 -
It ' s worth notice that, because the efficiency of public - key cipher is low, we introduce symmetric cipher, permutation code, and asymmetric cipher, rsa algorithm into the system to advance the efficiency of the whole system
值得指出的是，由於公鑰密碼體制效率較低，所以該系統採用對稱密碼演算法和公鑰密碼演算法相結合，採用排列碼加密解密演算法和rsa演算法相結合，充分利用兩者的優點，彌補其不足。 -
4. according to the property that all states of a certain cellular automata can build a permutation group, we can design block cipher based on this property
根據有些細胞自動機的所有狀態可以構成一個循環群這一特點，指出了利用細胞自動機構造分組密碼的方式。 -
Firstly, we discuss the general concepts of computer security and cryptology and describe the mostly used modem encryption methods and public key technologies including other typical algorithms. secondly, we put up a new combined security algorithm applied in the data transmission at network system on the base of introducing permutation code encryption ( a new type of block cipher ), and design the transmission system
本文首先討論了數據加密技術中主要的數據加密方法，詳細討論了傳統密碼加密方法和公開密鑰加密方法及其他典型加密方法，並介紹了一種新型的分組密碼演算法?排列碼加密演算法，進而提出了一種應用於網路數據傳輸中的安全演算法。 -
In this paper, against so many kinds of hazards in e - mail application, not changing the e - mail protocols in existence, we embed a good encryption algorithm, permutation code in the system to safeguard the information of e - mail, introduce public - key cipher to implement transfer of session keys safely, implement authentication and integrity of information, and introduce essential key management mechanism
本文針對電子郵件面臨的種種安全威脅，在不改變現有電子郵件協議的前提下，嵌入性能良好的排列碼加密解密演算法來保障郵件信息的安全，同時採用公鑰密碼體制來保障密鑰的安全傳遞，並實現消息的身份認證及數據完整性；還引入了必要的密鑰管理機制。 -
Block cipher is an important branch of mordant cryptography, and permutation theory has an important role in studying and designing of block cipher
分組密碼是現代密碼學中的一個重要研究分支，而置換理論在分組密碼的研究與設計中有著重要的地位。 -
First a review of developing history and designing principle of block cipher is given and the important function of permutation theory in block cipher is presented in this thesis
本文首先綜述了分組密碼的發展歷程、設計原理，以及置換理論在這個體制設計中的重要作用。
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