This chapter explains the common security threats to data, especially when it resides on cloud, and how we can secure our data. It also explains that Firebase is secure and we shouldn't worry much about the security of data as far as we manage the security properly at our end by defining proper rules in database and control access to the data to the authorized users.

Firebase is hosted on Secure Server Layer, which manages the security at the transport layer. It also gives you a powerful yet simple Rule engine that can be configured to secure your data and, at the same time, give the benefit of separation of concern—separates security logic from application logic.

We also learned in detail about security rules and how we can define them using simple JavaScript-like syntax.

In the next chapter, we will explore Firebase Cloud Messaging and Cloud Functions.