Securing a Shared Preference
suggest changeSimple 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);
Found a mistake? Have a question or improvement idea?
Let me know.
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