Full Title or Meme
The process of determining who a user is.
In the early days of computer networking is was convenient to distinguish the process of identification of a user from the process of determining the Authorization of what resources that user could access.
There are multiple process that can be used to attach identity to the user trying to access a computer resource. After many years of trying to define the terms used in the previous sentence, it has become clear that the sentence does not carry sufficient information to determine what it means.
Abandon the use of the term Authentication.