Скачать или смотреть Module 2:Difference B/W Authentication,Identification and Authorization users | Access Control |CEH

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===============Notes==========================
Identification
Identification occurs when a user (or any subject) claims or professes an identity. This can be accomplished with a username, a process ID, a smart card, or anything else that can uniquely identify a subject. Security systems use this identity when determining if a subject can access an object.

Authentication
Authentication is the process of proving an identity and it occurs when subjects provide appropriate credentials to prove their identity. For example, when a user provides the correct password with a username, the password proves that the user is the owner of the username. In short, the authentication provides proof of a claimed identity.

There are several methods of authentication that I’ll cover in another post, but in short they are:

Something you know, such as a password or PIN
Something you have, such as a smart card, CAC, PIV, or RSA token
Something you are, using biometrics....

Authorization
Once a user is identified and authenticated, they can be granted authorization based on their proven identity. It’s important to point out that you can’t have separate authorization without identification and authentication. In other words, if everyone logs on with the same account you can grant access to resources for everyone, or block access to resources for everyone. If everyone uses the same account, you can’t differentiate between users. However, when users have been authenticated with different user accounts, they can be granted access to different resources based on their identity.