Implementing ReCaptcha for spam protection

To add another layer of security to Firebase authentication, we will use ReCaptcha. This is a test supported by Google that helps us to protect data from automated bots for the purpose of spam and abuse. The test is simple and can be easily solved by humans, but obstructs bots and malicious users.

To read more about ReCaptcha and its uses, visit https://support.google.com/recaptcha/?hl=en.

ReCAPTCHA v2

In this section, we will be integrating ReCaptcha Version 2 into our application. In this version, the user is presented with a simple checkbox. If the tick turns green, the user has been verified.

Additionally, the user can also be presented with a challenge to distinguish between...