取代式密码的存在，已经超过2500年 以上，最早利 用的范例 是在西元600年 左右，内容是以颠倒的希伯來 文构成的。凯萨大帝（Julius Caesar）也曾经使用称为Caesar密码法。方法为将每个字母用其后的第三个字母來 取代。(Replace passwords existence, has more than 2,500 years or more, the first example is using a range of about the year 600 AD, the contents of the text is upside-down Heber future composition. Great Caesar (Julius Caesar) has also been known as the Caesar cipher using the method. Method is used then each letter is replaced by the third letter.)
3DES（即Triple DES）是DES向AES过渡的加密算法，它使用3条64位的密钥对数据进行三次加密(3DES (that is Triple DES) DES is a transition to the AES encryption algorithm, which uses three 64-bit key encrypting data three times)
java实现的Caesar移位密码，可以实现加密和解密功能！(java implementation of the Caesar shift passwords, encryption and decryption functions can be achieved!)
这个东西是惊天动地是加密解密与java的不同是从国外论坛下载的 希望开惊天私服的人能用上(This thing is shocking is the encryption and decryption and java different forum from abroad want to open the download can be used on people shaking PW)
Oreilly_Java_Cryptography EBOOK SOURCE CODE
这是一个文本加密、解密系统，提供了对称加密和非对称加密两种模式。此外，还实现了数字签名及其验证功能。(This is a text encryption, decryption system provides symmetric encryption and asymmetric encryption mode. In addition, implementation of digital signature and the authentication function.)
（1）为班级学生花名册建立开桶或闭桶散列表。 （2）友好性：界面要友好，输入有提示，尽量展示人性化。 （3）可读性：源程序代码清晰、有层次。 （4）健壮性：对输入的数据有纠错处理。((1) class roster for the establishment of open or closed barrels barrels hash table. (2) friendly: the interface should be friendly, to bring in people with tips, try to show humanity. (3) readability: source code clear, there are levels. (4) robustness: the input data are error-correcting processing.)
DES RSA 加密解密算法类，能够运行，而且有注释。(DES RSA encryption and decryption algorithm type, able to run, and the Notes.)
数字签名的加密和解密原理机制，以及附带Java源程序(Digital signature of the principle of encryption and decryption mechanism, as well as incidental Java source)
RSA的JAVA实现,界面很简洁,就三个按钮:生成密钥对,加密文件,解密文件.可以导入文件,但文件长度有限制,这是由于密钥长度而限制的(RSA JAVA interface is very simple, three buttons : Key Generation right, encrypted documents, The declassified document. can import documents, but there are restrictions on the length of documents, as key length restrictions)
说明： rsa加密解密是一种公钥加密算法，广泛应用于信息安全领域(rsa encryption and decryption is a public key encryption algorithm widely used in the field of information security)
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