3/20/2024 0 Comments Totp two factor authentication![]() You can also see if members of your team have activated two-factor identification by :ref:`looking at your sharing settings`_. You will only need to provide one of the authentication methods to enter your account. If you don’t have your security key available you will then be asked to provide a TOTP code. When you log in you will be asked for your security key first. You can activate both security keys and TOTP at the same time to have the option of using either method. You can read more about security keys here. When you activate two-factor authentication on your Gandi account you will provide both your regular password and additional code generated either from a TOTP authenticator app, usually on your mobile device (TOTP), or from a USB device you plug into your computer (security key). As a rule, the step is chosen with a duration of 30 seconds, and an OTP is automatically generated in the application every 30 seconds.Two-factor authentication refers to the security practice of requiring two different types of verification to prove your identity. This algorithm is based on the previous one and uses a time step as a variable. Time-based One-Time Password Algorithm (TOTP) After the user used all the passwords from the list, he had to visit the bank office to get a new list. For example, a list of generated passwords provided by the bank was used to confirm access or transactions on a user's bank account. This algorithm is not very handy, but it was often used in the 2000s when there were no convenient applications. Thus, if an attacker intercepts the OTP code, he won't be able to use it again. ![]() If the server and the client know the secret key and increment the counter equally at each user input, the resulting code value will be the same, and an OTP will change at each input. The result of the execution is quite a long value, so the code is reduced to 6-8 characters for the user's convenience. HOTP: HMAC-Based One-Time Password Algorithm To keep the password constantly changing, we need to enter some variable and use it in the algorithm. Based on this key, we will generate the one-time passwords. The process of passing the secret key can be as follows: the user either scans the QR code or enters the secret key manually. To set up 2FA on the server, a secret key is generated and transferred to the user's OTP-generating application. The user then opens an OTP-generating application, such as Google Authenticator, and enters the generated code. The authentication process is illustrated in the following diagram:Īfter the user logs in with their username and password, one is prompted to enter an OTP. The main distinguishing feature of these protocols is that the server does not need to send an OTP to the user's phone or email. Let's take a closer look at TOTP/HOTP protocols and their implementation. If a malicious party has obtained your password through theft or guessing, they will not be able to access your account without confirming the second factor. A push notification to the user's mobile application, which may include a code or the need to confirm the login within the application.An OTP is sent to the user's email (or through a magic link).A one-time password ( OTP) is sent to the user's phone via cellular communication (SMS).This could be achieved through various means, including: When it comes to 2FA, it involves an additional step in user authentication. In this article, we will discuss 2FA options and take a closer look at implementations of the commonly used time-based one-time password (TOTP) and a password and HMAC-based one-time password (HOTP) protocols. Two-factor authentication (2FA) significantly enhances account security by adding an extra step in the login process. However, relying solely on a password as the means of authentication is no longer sufficient, especially for critical accounts, such as bank accounts or personal email accounts, that serve as the point of access to other services. In a previous article, we discussed the proper implementation of password authentication. One of the most popular method of authentication remains the password.
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