A one-time password (OTP) is a short code that is valid for a single login or transaction and expires within a short window. Sent by SMS, it adds a second factor to authentication: even if a password is stolen, an attacker cannot complete the action without the phone that receives the code. This makes OTP SMS one of the most effective defences against phishing, keyboard logging, identity theft and account takeover.
Our mission-critical OTP solution gives enterprises both security and convenience. SMS-based confirmation works regardless of data volumes, message latency or geography, so OTPs are used wherever reliable authentication is essential: bill payment confirmation, account activation, user registration, mobile number validation and password resets. Banks, schools, shipping companies, e-commerce websites and many other businesses rely on SMSGatewayHub's premium OTP SMS service.