Modern methods of authentication and authorization in mobile applications
Published: 2023-07-17 11:57:51

With the development of mobile technology and the growth of online services, the security of authorization and authentication in mobile applications is becoming an increasingly important challenge for developers. In this paper, we explore modern authentication and authorization methods in mobile applications, such as OAuth, JWT, and two-factor authentication, and provide tips for developing secure authorization mechanisms.

## OAuth for secure authorization:

OAuth is an authorization protocol that allows users to share access to their data on one web service with another, without transferring a username and password.

Instead, the application receives a token that can be used to access specific data. This increases security because the application does not have access to the user's credentials.

Tips for using OAuth in mobile apps:

- Use only reliable OAuth providers that are reputable and keep user data secure.
- Protect sensitive data such as client secrets and tokens by storing them in a secure location, such as the operating system's KeyStore or a cloud-based sensitive data storage solution.
- Carefully check the permissions requested by the application when using OAuth. Request only the necessary permissions and provide transparency to users about the data being collected.

## JWT for secure authentication:

JWT (JSON Web Token) is a compact format for representing authentication and authorization information in the form of a token. It contains user information and additional data that can be verified and used for secure authentication.

Tips for using JWT in mobile applications:

- Use strong encryption when creating and validating JWTs. It is recommended to use public key encryption algorithms (e.g. RSA) and sign the token with the server's secret key.
- Do not include sensitive data such as user password or other sensitive information in the JWT. The JWT should only contain non-critical information that can be securely transferred between the client and the server.

## Two-factor authentication for enhanced security:

Two-factor authentication (2FA) is a security mechanism that requires a user to provide two different factors to prove their identity, usually something they know (such as a password) and, for example, a one-time code received via SMS or an authentication app.

Tips for using two-factor authentication in mobile apps:

- Encourage users to enable two-factor authentication, but don't make it mandatory so as not to create unnecessary barriers to using the app.
- Use reliable methods of delivering one-time codes, such as SMS or authentication apps, and make sure codes have a limited validity time.
- Provide a way to restore access in the event of device loss or problems obtaining a one-time code, such as through backup codes.


Authorization and authentication security in mobile apps is an integral part of development. When using authorization methods such as OAuth and JWT, it is recommended to pay special attention to the security of sensitive data and choose reliable providers. Two-factor authentication can significantly improve the security of an app, and developers should provide user-friendly methods to utilize it.

Material prepared by [crocoapps.com](crocoapps.com) team