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Two-factor authentication Trivia Questions

How much do you really know about Two-factor authentication? Below are 8 true or false statements. Click each one to reveal the answer and explanation.

1.

Two-factor authentication always requires a password plus a code sent via SMS.

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Medium
✗ FALSE

2FA can use biometrics, hardware tokens, or authenticator apps—SMS is just one common, less secure method.

2.

Using the same 2FA method for all accounts increases your overall security.

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Medium
✗ FALSE

Reusing one method creates a single point of failure; diversifying factors (e.g., hardware key for email) is safer.

3.

Some 2FA methods can be compromised by a SIM swap attack.

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Medium
✓ TRUE

SMS-based 2FA is vulnerable to SIM swapping, where attackers transfer your number to their device to receive codes.

4.

Hardware security keys are immune to all forms of remote hacking.

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Medium
✗ FALSE

While very secure, hardware keys can be physically stolen or targeted in supply chain attacks; no system is 100% immune.

5.

Google reported that 2FA blocks 100% of automated bot attacks.

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Hard
✓ TRUE

Google's security research found that even basic 2FA stops virtually all automated credential stuffing attacks.

6.

Phishing attacks can bypass two-factor authentication in real time.

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Hard
✓ TRUE

Attackers use reverse proxy phishing to intercept credentials and session tokens, defeating 2FA instantly.

7.

Push notification 2FA can be exploited via 'MFA fatigue' attacks.

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Hard
✓ TRUE

Attackers spam users with push prompts until they accidentally approve, granting access without a password.

8.

Two-factor authentication was invented in the early 2000s.

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Hard
✗ FALSE

The concept dates back to 1970s military systems; RSA SecurID tokens popularized it commercially in the 1980s.

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