In this chapter, we studied and implemented one of the most useful and necessary techniques with the purpose of sharing and protecting our information. Nowadays, applications have dramatically increased their interaction with each other because they want to meet and satisfy the requirements of clients, users, and so on, compromising neither the security nor the integrity of the data while doing this.

In this chapter, we studied several technologies to secure, limit, and authorize the use of our resources to a third-party application, starting with brief but descriptive concepts about OAuth 2.0 authentication, Single Sign-On, filters, and tokens.

Through a practical example and real code, you witnessed how you can grant permission over specific resources to a third-party application in order to share the information and maintain control over it. Also, we checked and worked with specific code to implement one of the most used technologies in recent times, especially in the world of social...