Internship two block cipher encryption An internship purpose An understanding of the principles of symmetric encryption algorithms, symmetric encryption algorithms used are familiar: DES, TripleDES, Blowfish 2, DESede encryption algorithm, for example, plus master block encryption algorithm to achieve decryption process. Second, the practical content 1. [Basic requirements] With DES/DESede for example, the use of java in the relevant class implements the specified string encryption and decryption. 2. [Achieve prompt] (1) can be used to create a java class in KeyGenerator symmetric secret key, use the static method getInstance factory class KeyGenerator of () to get KeyGenerator () class object (2) the method getInstance () argument is a string type, specify the name of the encryption algorithm, such as: Blowfish, DES, DESede, HmacMD5 or HmacSHA1 etc. (3) the use of factory class Cipher objects can create a password control. The same, getInstance () argument is a string typ

src\SDec.java
...\SEnc.java
...\Skey_DES.java
...\Test.java
src

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