API Key Authentication is one of the simplest methods to protect Drupal REST APIs. Once you have generated API Keys for all your users, you can then use those keys to secure access to your Drupal REST APIs.
Basic Authentication is a very simple and straight-forward Authentication method. The client sends HTTP requests with an Authorization header that contains a base64-encoded username and password of your Drupal site.
What is Taxonomia?
Taxonomia is used to classify website content. One common example of taxonomy is the tags used to classify or categorize posts in a blog website; the farmers market website could use an ingredients taxonomy to classify recipes. Individual taxonomy entities are known as terms (the blog tags or recipe ingredients in these examples); and a set of terms is known as a vocabulary (the set of all blog post tags, or the set of all recipe ingredients in these examples).