Java tutorial
//package com.java2s; import javax.crypto.Cipher; import javax.crypto.spec.SecretKeySpec; import android.util.Base64; public class Main { public static String decryptData(String encryptBase64Data, String keyBase64) { SecretKeySpec key = new SecretKeySpec(Base64.decode(keyBase64, Base64.DEFAULT), "DES"); Cipher decipher = null; try { decipher = Cipher.getInstance("DES"); decipher.init(Cipher.DECRYPT_MODE, key); byte[] encryptData = Base64.decode(encryptBase64Data, Base64.DEFAULT); return new String(decipher.doFinal(encryptData), "UTF8"); } catch (Exception e) { } return null; } }