postheadericon AES with CFM mode example in Java

package bsr;
import javax.crypto.*;
import javax.crypto.spec.*;
class AESCFM
public KeyGenerator keygenerator;
public SecretKey myDesKey;
Cipher c;
public IvParameterSpec iv;
public AESCFM() throws Exception

// Genrate the Key
keygenerator = KeyGenerator.getInstance("AES");
keygenerator.init(new SecureRandom());
myDesKey = keygenerator.generateKey();

// Create the cipher
c = Cipher.getInstance("AES/CFB/PKCS5Padding");

iv = new IvParameterSpec(new byte[16]);
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.*;
public class AES

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

  1. Open  command prompt
  2. Compile bsr package 
    • go to bsr directory
    • javac *.java 
  3. Compile
    • javac
  4. Execute
    • java AES


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