Which authentication allows login without a password?

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Multiple Choice

Which authentication allows login without a password?

Explanation:
Passwordless authentication means logging in without entering a password by using an alternative verification method such as a one-time code, a hardware security key, or biometric verification. This approach keeps security while eliminating the need to type a password, making it the direct match for login without a password. The other terms don’t describe a legitimate login method: biometric impersonation refers to faking biometrics to bypass security, not a standard authentication flow; private information retrieval is a cryptographic technique for querying data privately and isn’t used for user login; cryptocurrency is digital money and not an authentication mechanism.

Passwordless authentication means logging in without entering a password by using an alternative verification method such as a one-time code, a hardware security key, or biometric verification. This approach keeps security while eliminating the need to type a password, making it the direct match for login without a password. The other terms don’t describe a legitimate login method: biometric impersonation refers to faking biometrics to bypass security, not a standard authentication flow; private information retrieval is a cryptographic technique for querying data privately and isn’t used for user login; cryptocurrency is digital money and not an authentication mechanism.

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