Symetric: Encryption and decryption by same key ~ HTML Title Kartik Mandal

package com.kartik;

import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
/**
*
* @author kartik
* Blog https://java2blogs.blogspot.com/
* DES - Encrypt Data using Key
* DES - Descypt Data using Same Key
*/
public class SymetricEncrytionAndDecryption
{
public static void main(String[] argv) {

try{

      KeyGenerator keygenerator = KeyGenerator.getInstance("DES");
      SecretKey myDesKey = keygenerator.generateKey();

      Cipher desCipher;

      // Create the cipher
      desCipher = Cipher.getInstance("DES/ECB/PKCS5Padding");

      // Initialize the cipher for encryption
      desCipher.init(Cipher.ENCRYPT_MODE, myDesKey);

      //sensitive information
      byte[] text = "No body can see me".getBytes();

      System.out.println("Text [Byte Format] : " + text);
      System.out.println("Text : " + new String(text));

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

      System.out.println("Text Encryted : " + textEncrypted);

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

      // Decrypt the text
      byte[] textDecrypted = desCipher.doFinal(textEncrypted);

      System.out.println("Text Decryted : " + new String(textDecrypted));

}catch(NoSuchAlgorithmException e){
   e.printStackTrace();
}catch(NoSuchPaddingException e){
   e.printStackTrace();
}catch(InvalidKeyException e){
   e.printStackTrace();
}catch(IllegalBlockSizeException e){
   e.printStackTrace();
}catch(BadPaddingException e){
   e.printStackTrace();
}

}
}

About Kartik Chandra Mandal

I am Kartik Chandra Mandal from Bangalore, India. Working as software engineer in Java technology. Have good knowledge of OWASP and CSRF in security for applications and it's implementation in Java technology.

HTML Title Kartik Mandal