基于IDEA算法的數(shù)據(jù)加密解密及數(shù)字簽名

摘要

隨著Internet的普及，計算機的安全問題越來越重要，出現(xiàn)了許多關于計算機安全的加密算法，進年來分組密碼新的算法不斷涌現(xiàn)，而其中IDEA算法就是其中對數(shù)據(jù)加密的1種重要加密算法，它在方法論上是新穎的，而且速度快。其特點就是加密與解密相同，只是密鑰各異。無論用軟件或硬件來實現(xiàn)都不難。加密與解密運算速度都非�？�。
而我們在這個軟件中主要是實現(xiàn)了從文件中讀取數(shù)據(jù)，對讀取的數(shù)據(jù)進行加密。并把加密后的文件保存到文件中。其后實現(xiàn)了對加密文件的解密，解密后與原文比較。最后就是為了解決假冒問題的數(shù)字簽名。
國際數(shù)據(jù)加密算法是分組密碼的佼佼者，因此在現(xiàn)今的數(shù)據(jù)加密方面應用很多。
關鍵字：加密;解密;密鑰;數(shù)字簽名

Abstract
 
With the Internet popularization, the computer security problem is becoming more and more important.As a result,,it appeared many algorithm about the computer security encryption , in recent yeas new algorithm of block cipher have emerged in large numbers,but IDEA algorithm is an important one of the data encryption   encryption algorithm. In the methodology it is novel, moreover the speed is quick..Its character is the encrypt and the decipher is same, only the key is respectively different. It doesn’t difficult to realize it with the software or the hardware .The encryption and the decipher operating speed is both extremely quick.
But what we mainly obtain in this software is we have read the data from the document, which had been carried on the encryption ,and then we decipher the documents which have been encrypted, furthermore, we compare the two kinds of documents.The last problem is in order to solve the digital signature of counterfeit question.
The international data encryption algorithm is the outstanding one in block cipher,therefore,nowadays there are a lot of applications in data encryption .

Keywords: encryption; decrypt,;key;digital signature

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