Are there any particular instances where multifactor authentication has been used? What are a few advantages of using complicated passwords?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Are there any particular instances where multifactor authentication has been used? What are a few advantages of using complicated passwords?

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Are there any particular instances where multifactor authentication has been used? What
Multifactor authentication is becoming increasingly popular in order to protect user data. There are a number of reasons for this, including the fact that it is harder for attackers to gain access to information if they don’t have access to the user’s primary device.
 
Multifactor authentication has been used in various scenarios such as online banking, remote access, and more.
 
Multifactor authentication increases the level of security users have by requiring more than one form of identification. Some common implementations of multifactor authentication are username and password, two-factor authentication, and biometric authentication.
 
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