OTP (One-Time Password) is a temporary code generated to validate a user identity for a specific operation. It expires after use or within a few minutes, making it much safer than fixed passwords.
OTP (One-Time Password) is a temporary code generated to validate a user identity for a specific operation. It expires after use or within a few minutes, making it much safer than fixed passwords.
The user enters their phone number during login or a transaction. The application generates a random code, sends it by SMS, and the user types the code to confirm. Because the phone is a personal channel that is hard to mass-clone, SMS increases security without requiring additional apps.
There are time-based OTP (TOTP, like authenticator apps) and channel-delivered OTP (SMS, email, push). SMS OTP is the most universal: it works on any phone, requires no app installation, and does not depend on internet.
SMS has high delivery and read rates, reaches any mobile phone, and does not depend on smartphones. For Brazilian companies, it is the most inclusive form of two-factor authentication, especially when part of the user base does not use authenticator apps.
Yes, especially when combined with another factor (2FA). Alone, it is safer than reused passwords but should be used alongside good authentication practices.
Usually between 30 seconds and 10 minutes, depending on configuration. After expiration, the code can no longer be used.
Yes. Use POST /v1/sms/send/single with the code generated by your backend. SMSGo delivers with low latency and provides status webhooks.
No. OTP can be sent from a regular long number. Fast delivery and delivery confirmation webhook are what matter.
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