OTP code

An OTP code (One-Time Password) is a single-use, short-lived code, sent by SMS to validate a login or a payment.

In brief

An OTP code (One-Time Password) is a single-use, short-lived code, sent by SMS to validate a login or a payment.

To go deeper

The OTP is a code usable only once and for barely a few minutes. Carried by SMS, it stands as the most widespread second authentication factor, since it requires no installation on the recipient's side.

Its ubiquity must not obscure its flaws: the SMS isn't end-to-end encrypted and remains vulnerable to SIM-card hijacking as well as phishing. An OTP code is shared with no one, not even a supposed adviser.

Send an anonymous SMS FAQ Blog

Related concepts

Browse all concepts

01A2P SMSAn A2P SMS (Application-to-Person) is a message emitted automatically by a computer system to a mobile, as opposed to a text written by a human.02SmishingSmishing is phishing carried out by SMS, seeking to extort personal or bank data by posing as a trusted organisation.

// Anonymous SMS · Hidden number · To France

Envoyez votre message, gardez l'anonymat

Votre numéro reste masqué, aucune inscription, aucune trace. Rédigez, confirmez, et votre SMS part de façon totalement anonyme.

Envoyer un SMS anonyme