2FA SMS Authorization

Start two-step SMS verification (2FA) and:

  • improve security on your website, application
  • protect logins with SMS codes to enhance account security
  • send SMS one-time passcodes (OTP)
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What is SMS authorization?

SMS authentication is an additional layer of security for logins, transactions and other important processes and decisions on a website or application. By definition, SMS-based two-factor authentication aims to improve system security. SMS authentication works by sending a one-time code to the user's mobile phone, which they must enter to complete the login process.

2FA SMS, SMS verification, SMS authentication, SMS code, SMS login, SMS token, SMS pin, and SMS OTP are all other names for SMS authentication. Although the above terms have different definitions, they describe a similar solution: sending a text message with a code required to authenticate the user via their mobile phone.

How does SMS authentication work?

SMS authorization is an off-the-shelf solution available within the SMS Authenticator tool. You pay only for the code messages sent. How do you get 2FA SMS up and running? It's simple, fast and doesn't require an external application.

  • 1

    Create an account on the SMSAPI website

    Registration with SMSAPI is free, requires no credit card and takes just a few minutes. After a quick verification, your account is ready to use. To start, you get SMS messages for testing.

  • 2

    Check out the SMS API Documentation

    SMSAPI Documentation contains all the necessary information, code examples and a ready-made script.

  • 3

    Use a ready-made tool or create your solution

    SMS Authenticator is an off-the-shelf tool that allows you to send SMS authorization codes. You can also write your own script and use SMS API to send authorization messages.

  • 4

    Done!

    Whichever way you choose, remember that you need points in your SMSAPI account to send SMS codes. Just be sure to set up automatic top-ups to ensure uninterrupted SMS authorization.

What is multi factor authentication (MFA)?

Multi-factor authorization (MFA multi-factor authorization) involves checking two or three authentication factors belonging to different categories:

  • something we know - a login and password pair, a pin, a token, personal information
  • something we have - token, SMS code, code card, certificate, USB key, application
  • something we are - biometrics: retina, fingerprints, handwriting, voice, face shape


What is 2FA (two-factor authentication)?

Two-factor authentication - definition

Two-factor authentication (2FA, two-factor authorization) involves checking two separate verification factors: knowledge, possession or identity - see list above. Supplementing the login with an additional request for a code sent in a text message (2FA SMS) is a popular way to implement two-factor authorization, just like authenticator apps or push authentication.

A real-life example: when paying with a card, the terminal asks for a pin. In this situation, two factors are checked: physical possession of the card (something we have) and knowledge of the corresponding string of digits (something we know). Card payment with a confirmed PIN is an example of two-factor authorization.

2FA SMS applications - examples of SMS authorization content

SMS two-factor authentication and one-time verification code sending is a secure and easily scalable solution, which is why small and medium-sized companies worldwide use it. Check out the applications of 2FA SMS in various industries, such as banks, finance, online services, medicine, e-commerce, government offices, and public institutions.

Applications:

Authentication of login, registration

Secure data, accounts, and new user registrations with SMS codes sent to the user's personal mobile phone. Enter two-factor authentication on a website or application.

467821 - this is your code for logging into the panel.
Confirm your registration on the site. Transcribe the code JKJ&45 and log in.

Authorization of payments, decisions and deadlines

SMS with an authorization code is an additional layer of security in online stores, online banking, finance and services.

Confirm the transfer order. Enter SMS pin 6631560 in the application.
The last step is to confirm the transaction. Enter the authorization code from the user panel: yuyP6733

Password reminders

SMS messages can also be used to send password reset and login reminders. Enter a new channel to the site’s security system and your mobile app.

Your password has been reset. Temporary password: mujma63. Valid for 5 minutes. Log in and set a new password.
Automatic notification of password change. Confirm the change with the code 652289.

One-time passwords (OTP, one-time password)

OTP (one-time password), or one-time password, is a convenient method of logging in with a password sent to your phone number.

#PASSWORD: 16675309
Your SMS one-time password: 189744

User activation after a long absence

Improve login security after a prolonged absence of users with a code sent in a text message.

The system has detected a new login to the service. Confirm by entering the login code: 452783
Welcome back. Your SMS login code: 764925

Applications:

Authentication of login, registration

Authentication of login, registration

Secure data, accounts, and new user registrations with SMS codes sent to the user's personal mobile phone. Enter two-factor authentication on a website or application.

467821 - this is your code for logging into the panel.
Confirm your registration on the site. Transcribe the code JKJ&45 and log in.
Authorization of payments, decisions and deadlines

Authorization of payments, decisions and deadlines

SMS with an authorization code is an additional layer of security in online stores, online banking, finance and services.

Confirm the transfer order. Enter SMS pin 6631560 in the application.
The last step is to confirm the transaction. Enter the authorization code from the user panel: yuyP6733
Password reminders

Password reminders

SMS messages can also be used to send password reset and login reminders. Enter a new channel to the site’s security system and your mobile app.

Your password has been reset. Temporary password: mujma63. Valid for 5 minutes. Log in and set a new password.
Automatic notification of password change. Confirm the change with the code 652289.
One-time passwords (OTP, one-time password)

One-time passwords (OTP, one-time password)

OTP (one-time password), or one-time password, is a convenient method of logging in with a password sent to your phone number.

#PASSWORD: 16675309
Your SMS one-time password: 189744
User activation after a long absence

User activation after a long absence

Improve login security after a prolonged absence of users with a code sent in a text message.

The system has detected a new login to the service. Confirm by entering the login code: 452783
Welcome back. Your SMS login code: 764925

Protect yourself from traffic pumping attacks (SMS traffic fraud)

SMSAPI actively protects its customers from traffic pumping attacks (SMS traffic fraud). They generate artificial website traffic and send requests for one-time use codes. As a result, the victim company can be billed for SMS shipments to more expensive, exotic destinations. This allows the company to limit the sending of verification codes to only selected countries.

SMSAPI offers an adequate safeguard - limiting shipping countries and shipping limits. Learn about the solution that makes the scooping of SMS by dishonest competitors impossible. In addition, we conduct 24/7 monitoring of the correct operation of our services and have an active anti-spam filter. SMSAPI is also ISO 27001 certified, which confirms our employees' high quality of security, infrastructure and training.

SMS messages with codes vs. GDPR (marketing consents)

You don't need SMS marketing consent to send SMS authorization and one-time codes - mobile authorization is part of operating your service, product, or company. All you need to do is include them in your privacy policy.

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