June 2011
Beginner
372 pages
9h 54m
English
Content preview from Microsoft® Windows® Security: EssentialsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Comparing the Three Factors of Authentication
Authentication occurs when an entity presents credentials and the credentials are verified as valid. For example, when a user logs on with a username and password, the system checks to ensure that the username and password are valid and, if so, authenticates the user.
You’ve probably accessed systems using a username and password before, but there are other methods of authentication that may be configured in higher-security environments. The three primary types, or factors, of authentication are as follows:
Something You Know This includes information such as passwords or personal identification numbers (PINs).
Something You Have This includes items you can hold, such as a smart card.
Something You ...
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