2FATool
2FA /Two-step verification code acquisition tool (equivalent to the web version of Google Authenticator), just enter the key when using it.
2FA Tool How To Use
Demo key: 7J64V3P3E77J3LKNUGSZ5QANTLRLTKVL (Click this key to copy)
Newbie tips: You must enter the verification code to log in or verify before the end of the countdown, otherwise it will be invalid and an error will be displayed. When testing the function, you must enter the correctly encoded key. Do not enter a string of characters casually to test the acquisition function. At present, after clicking the button to get the verification code, the verification code will be automatically copied to the clipboard and can be pasted directly. If you want to verify whether the generated verification code is correct, click the button to generate the QR code and use the Google Authenticator APP to scan and add a check.
what is 2fa
Two-Factor Authentication Definition Two-factor authentication (2FA) is a security process that increases the authenticity of a person's identity. This process requires users to provide two different authentication factors before accessing an application or system, rather than simply providing their username and password. In the face of increasingly sophisticated cyberattacks in the cybersecurity environment, 2FA is an important security tool for organizations to protect their data and users.
Understanding the Google Authenticator Working Principle
Many mobile users employ Google Authenticator to generate authentication tokens, utilizing two-factor authentication (2FA) for enhanced security. This application generates a time-varying one-time password for account verification without requiring a network connection.
Core Components of the TOTP Algorithm
- Shared Secret: A sequence of bits used to establish an account on the mobile device.
- Time Input: The current time input comes from the mobile device itself.
- Signing Function: The signing method used is HMAC-SHA1.
Shared Secret
The shared secret can be input manually or scanned via a QR code, then encrypted using base32.
Time Input (Current Time)
The time value input is critical for the operation, emphasizing the importance of accurate time on the mobile device.
Signing
Using HMAC-SHA1, a unique output is generated based on the input secret, utilizing the current time as input.
Algorithm Steps
- Encrypt the secret using base32.
- Obtain the current time value, using UNIX time function.
- Perform HMAC-SHA1 calculation to generate the one-time password.
- Convert the output into a 6-digit number for the final authentication token.
This detailed explanation helps in understanding how Google Authenticator generates secure one-time passwords using the Time-Based One-Time Password (TOTP) algorithm.