What is the recommended method to store small amounts of sensitive data?

The recommended method for storing small amounts of sensitive data is to use the device's keystore or keychain. This approach leverages the platform's built-in security features specifically designed to manage sensitive information such as passwords, tokens, and cryptographic keys securely.

The keystore or keychain provides a secure environment where the data is encrypted and protected from unauthorized access. It is specifically designed for handling credentials and is integrated into the operating system, which applies strong security protocols to safeguard the stored information. This ensures that sensitive data is not only kept private but also protected from various vulnerabilities that can arise with less secure storage methods.

Other storage methods, such as plain text storage or storing data in traditional database tables or encrypted text files, do not offer the same level of inherent security that the keystore or keychain provides. Plain text storage exposes sensitive data directly, while even encrypted text files require careful management of encryption keys. Database tables, while secure if configured correctly, may be more susceptible to attacks and require additional security measures to protect the stored data. Therefore, utilizing the device's keystore or keychain is the most effective and secure means of handling sensitive information on mobile devices.