Encrypting a String with DES : DES « Security « Java

Encrypting a String with DES


import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;

class DesEncrypter {
  Cipher ecipher;

  Cipher dcipher;

  DesEncrypter(SecretKey key) throws Exception {
    ecipher = Cipher.getInstance("DES");
    dcipher = Cipher.getInstance("DES");
    ecipher.init(Cipher.ENCRYPT_MODE, key);
    dcipher.init(Cipher.DECRYPT_MODE, key);

  public String encrypt(String str) throws Exception {
    // Encode the string into bytes using utf-8
    byte[] utf8 = str.getBytes("UTF8");

    // Encrypt
    byte[] enc = ecipher.doFinal(utf8);

    // Encode bytes to base64 to get a string
    return new sun.misc.BASE64Encoder().encode(enc);

  public String decrypt(String str) throws Exception {
    // Decode base64 to get bytes
    byte[] dec = new sun.misc.BASE64Decoder().decodeBuffer(str);

    byte[] utf8 = dcipher.doFinal(dec);

    // Decode using utf-8
    return new String(utf8, "UTF8");

public class Main {
  public static void main(String[] argv) throws Exception {
    SecretKey key = KeyGenerator.getInstance("DES").generateKey();
    DesEncrypter encrypter = new DesEncrypter(key);
    String encrypted = encrypter.encrypt("Don't tell anybody!");
    String decrypted = encrypter.decrypt(encrypted);


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1.DES Crypter and Decrypter
2.Decrypt an object with DES
3.Encrypt an object with DES
4.Encrypting an Object with DES
5.Encrypting a File or Stream with DES
6.Triple DES
7.Encrypting with DES Using a Pass Phrase
8.DES Engine
9.DES algorithm
10.Des Encrypter
11.DES Decrypt
12.DES Encrypt