Key information not exposed
When transmitting a QR code, most key information is exposed and there is a risk of theft, but when using the Key4C OTP APP
Key information is not exposed during OTP key generation as well as knee distribution, enhancing safety and security.

Efficient OTP management
Old OTP accounts are periodically replaced or deleted to renew the OTP security retention period.
We provide it so that it can be safely used as a valid OTP without being left unattended.


Enhanced authentication security
We maintain high security by using a secure password that is periodically updated.
Two-step authentication is also provided by entering the OTP along with the password required for existing login.

Secure key generation
OTP key required for OTP account based on HSM (Hardware Security Module)
By creating, storing, and managing securely, you can improve the security and safety of your system.


***** main function *****
- Easy OTP account registration by scanning QR code (no login required)
- To enhance security, each OTP provides a validity counter whose number is periodically updated.
- Each OTP has an expiration date, so it is always kept up to date through periodic key renewal.
- Only the QR code of the OTP key generated through the Key4C service can be registered. (Other OTP QR codes cannot be used)