Authentication is the process of recognizing a user's identity. It is the mechanism of associating an incoming request with a set of identifying credentials. The credentials provided are compared to those on a file in a database of the authorized user's information on a local operating system or within an authentication server.
The principle of least privilege (PoLP) is a computer security concept in which a user is given the minimum levels of access – or permissions – needed to complete his/her job functions. This principle is a proactive way of enhancing the protection of data and functionality from faults and malicious behavior.
Zero trust is a security concept that requires all users, even those inside the organization's enterprise network, to be authenticated, authorized, and continuously validating security configuration and posture, before being granted or keeping access to applications and data.
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