When verification is needed, you just have to open your authenticator app, and you will get the TOTP code corresponding to the TOTP secret. We can use authenticator apps to store the TOTP secret and authenticator apps will automatically generate TOTP codes for you. This is where authenticator apps come in handy. When users use TOTP as a 2-factor authentication method, they often encounter the challenge of storing the TOTP secret and generating TOTP codes. Therefore, verifying TOTP is commonly used as a means of 2-factor authentication. Additionally, TOTP produces a numerical string, making it simple and user-friendly. With a shared TOTP secret key between the user's phone and the app server, the user's phone and the app server can generate the same TOTP code at the same point in time:Īpp Server Shared TOTP Secret User Phone App Server Shared TOTP Secret User Phone Retrieve secret Secret Generate TOTP code(211022) by the secret and current time Send TOTP code(211022) Retrieve secret Secret Generate TOTP code(211022) by the secret and current time Compare the generated code with the received one (both 211022) Verification successfulĪs TOTP generation relies on time, it can be calculated offline. As the Wikipedia says, it is a computer algorithm that generates a one-time password (OTP) that uses the current time as a source of uniqueness. TOTP stands for Time-based one-time passwords. In this article, we will explore how to integrate authenticator app verification into your Node.js app, enhancing the security of the authentication process for your users. Common authentication methods include TOTP authentication using an authenticator app, biometric authentication, device authentication, and more. In such cases, an additional layer of authentication is necessary to ensure that the entity being authenticated with the current identity identifier is the actual user. This is because these identity identifiers and their corresponding verification information may be vulnerable to leaks. However, in scenarios with higher security requirements, relying solely on identity identifiers for authentication is not enough. By combining these identity identifiers with corresponding passwords or verification codes, we can complete the process of authentication. In traditional applications, we typically use Email/Username/Phone as our identity identifiers.
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