What methods or tools do you use for data protection in storage systems?

The following methods and tools are commonly used for data protection in storage systems on Android:

• Data encryption: using Android Keystore for secure key storage and encrypting files or SharedPreferences.
• Using EncryptedSharedPreferences and EncryptedFile from the AndroidX Security Library for simple and secure data storage.
• Access restriction: setting file permissions, using private mode for application files.
• Authentication and authorization: verifying user rights before accessing data.

Example of using EncryptedSharedPreferences:

SharedPreferences encryptedPrefs = EncryptedSharedPreferences.create(
    "secret_prefs",
    masterKeyAlias,
    context,
    EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
    EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
);

encryptedPrefs.edit().putString("token", "secret_value").apply();

This ensures encryption of keys and values in SharedPreferences.