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In page Information security:
"Strong authentication requires providing more than one type of authentication information (two-factor authentication).[12] The username is the most common form of identification on computer systems today and the password is the most common form of authentication.[13] Usernames and passwords have served their purpose, but they are increasingly inadequate. Usernames and passwords are slowly being replaced or supplemented with more sophisticated authentication mechanisms such as time-based one-time password algorithms.[citation needed]
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