Authentication

Authentication is the security function that consists of providing and checking proof of the identity of a person, message sender, software, logical server or equipment.

For personal authentication, the terminology is as follows:

• to identify oneself is to give/deliver one's identity;

• Identifying a person means asking for and obtaining his or her identity;

• authentication consists in providing proof of identity;

• Authentication consists of verifying a person's identity by requesting tangible proof of their identity, then validating or invalidating this proof.

There are other notions related to authentication that must be understood to avoid confusion.

Authorization...