ConceptSMS OTP / 短信一次性密码
SMS OTP
A one-time password delivered via text message, commonly used for multi-factor authentication. It carries security risks such as SIM swapping and vulnerabilities in the SS7 protocol, and is regarded as a comparatively weak authentication factor.
Timeline (last 90 days)
Nov 2
In SP 800-63B, the U.S. NIST lists SMS OTP as a 'restricted' authentication method and does not recommend it for high-security scenarios.
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