OTP Authentication Code Generator: In-depth knowledge of dual authentication (2FA)
In today ' s time when passwords are leaking, it is no longer enough to rely solely on traditional user names and passwords to protect your online accounts. Dual authentication (2FA) It became a mandatory option for safety protection. I'm not sure. Time-based one-time password (TOTP) It is one of the most widely applied and accessible programmes at present. This tool helps you generate Google compatibility in real time in browsers Validation codes for applications such as Autocentor, to facilitate debugging or backup login by developers.
1. What is the TOTP algorithm?
TOTP (Time-based One-time Password) is based on HMAC Algorithms for improved versions. Its core principle is to run a shared key with the current system's time stamp. Because every time 30 seconds to update, so the resulting authentication code will change and each certification code will only be used once.
2. What is the key (Secret)?
When you open 2FA, the website will show you a 2-D code or a string of characters, which is Key 。 It usually uses Base32 codes. As long as you keep this key, you can use any compatible device (e.g., AMP) or this online tool) generate the same authentication code. Please keep the key safe and do not disclose it to others.
3. Security of the instrument
Many users are concerned about the security of online generation of authentication codes. This tool is used A pure frontend JavaScript , all Hash calculations, Base32 decodes are done locally by your browser. We... Won't Uploads your key to any server. You can even use this tool after you have broken the network for extreme security.
4. Description of common configuration items
- Digits: The majority of services (e.g. GitHub, Google) use 6-bit certification codes, and some financial services may require 8-bit.
- Step (Perood): The standard step is 30 seconds.
- Hash algorithm: Although SHA-256 and SHA-512 are safer, 99 per cent of the current 2FA services are still using SHA-1 for compatibility purposes.
Common Question Answers (FAQ)
Q: Why is the resulting authentication code not available?
A: Check your computer for accuracy of the system time. TOTP Algorithms are extremely time-sensitive and even a few seconds of error may lead to certification failure. Second, confirm that the key input is complete.
Q: What if the ID on the phone is lost?
A: If you have saved a key string before, you can use this tool to retrieve the authentication code. Otherwise, you need to use the “backup recovery code” available on your website or contact your customer service for an identity complaint.