Android Secure SharedPreferences Securing a Shared Preference

Help us to keep this website almost Ad Free! It takes only 10 seconds of your time:
> Step 1: Go view our video on YouTube: EF Core Bulk Extensions
> Step 2: And Like the video. BONUS: You can also share it!


Simple Codec

Here to illustrate the working principle we can use simple encryption and decryption as follows.

public static String encrypt(String input) {
    // Simple encryption, not very strong!
    return Base64.encodeToString(input.getBytes(), Base64.DEFAULT);

public static String decrypt(String input) {
    return new String(Base64.decode(input, Base64.DEFAULT));

Implementation Technique

public static String pref_name = "My_Shared_Pref";

// To Write
SharedPreferences preferences = getSharedPreferences(pref_name, MODE_PRIVATE);
SharedPreferences.Editor editor = preferences.edit();
editor.putString(encrypt("password"), encrypt("my_dummy_pass"));
editor.apply(); // Or commit if targeting old devices

// To Read
SharedPreferences preferences = getSharedPreferences(pref_name, MODE_PRIVATE);
String passEncrypted = preferences.getString(encrypt("password"), encrypt("default_value"));
String password = decrypt(passEncrypted);

Got any Android Question?