3.6. Summarize the various authentication models and identify the components of each.
Authentication is the mechanism by which a person proves their identity to a system. It is little more than the process of proving that a subject is the valid user of an account. Often the authentication process involves a simple username and password. But other more complex authentication factors or credential-protection mechanisms are involved in order to provide strong protection for the logon and account-verification process. The authentication process requires that the subject provide an identity and then proof of that identity. Identity proofing typically takes the form of one or more of the following three authentication factors:
Something you know
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