QuestionJuly 29, 2025

Which of the following is the safest authentication method? a. Authentication using an SMS OTP b. Authentication using a smartphone c. Authentication using security keys d. Authentication using a smart card

Which of the following is the safest authentication method? a. Authentication using an SMS OTP b. Authentication using a smartphone c. Authentication using security keys d. Authentication using a smart card
Which of the following is the safest authentication method?
a. Authentication using an SMS OTP
b. Authentication using a smartphone
c. Authentication using security keys
d. Authentication using a smart card

Solution
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Answer

c. Authentication using security keys Explanation 1. Evaluate SMS OTP Vulnerable to interception and SIM swapping. 2. Evaluate Smartphone Authentication Can be secure but depends on device security; vulnerable to malware. 3. Evaluate Security Keys Hardware-based, resistant to phishing and remote attacks. 4. Evaluate Smart Card Secure but requires physical possession and can be lost or stolen.

Explanation

1. Evaluate SMS OTP<br /> Vulnerable to interception and SIM swapping.<br />2. Evaluate Smartphone Authentication<br /> Can be secure but depends on device security; vulnerable to malware.<br />3. Evaluate Security Keys<br /> Hardware-based, resistant to phishing and remote attacks.<br />4. Evaluate Smart Card<br /> Secure but requires physical possession and can be lost or stolen.
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