postheadericon DES with CBC mode example in Java

class DESCBC
public KeyGenerator keygenerator;
public SecretKey myDesKey;
Cipher c;
public IvParameterSpec iv;
public DESCBC() throws Exception
// Genrate the Key
keygenerator = KeyGenerator.getInstance("DES");
keygenerator.init(new SecureRandom());
myDesKey = keygenerator.generateKey();

// Create the cipher
c = Cipher.getInstance("DES/CBC/PKCS5Padding");

iv = new IvParameterSpec(new byte[8]);
public byte[] doEncryption(String s) throws Exception
   // Initialize the cipher for encryption
   c.init(Cipher.ENCRYPT_MODE, myDesKey,iv);

   //sensitive information
   byte[] text = s.getBytes();

// Encrypt the text
   byte[] textEncrypted = c.doFinal(text);

public String doDecryption(byte[] s)throws Exception

   // Initialize the same cipher for decryption
   c.init(Cipher.DECRYPT_MODE, myDesKey,iv);

   // Decrypt the text
   byte[] textDecrypted = c.doFinal(s);

return(new String(textDecrypted));

import bsr.*;
/*A code from*/
public class DES

public static void main(String[] argv) throws Exception
byte[] str=d.doEncryption("BipinRupadiya");
System.out.println("Encrypted String : "+str);
System.out.println("Encrypted String : "+d.doDecryption(str));

To execute this code

  • open two command prompt
  • compile bsr package
  • compile
  • execute


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