When logging into a secure system, which method provides the highest level of security assurance?
Multifactor authentication requiring both a password and a biometric verification
Using a password
Using a hardware token issued by the organization
Receiving a one-time password via email or SMS
Multifactor authentication provides the highest level of security assurance because it requires more than one method of verification before granting access. This makes it significantly harder for unauthorized users to gain access since they would need to compromise multiple authentication factors. A password only provides one layer of security, often known as single-factor authentication, and can be more easily compromised than a system that uses multifactor authentication. A one-time password enhances security but is still considered a single factor (something you have) and could potentially be intercepted or retrieved by unauthorized individuals if it is the only method used. Using a hardware token alone is also a single-factor (something you have) and presents a risk if the token is lost or stolen. Multifactor authentication typically combines two or more of these elements (something you have, something you know, and/or something you are) to secure access.
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