Flash Call
Flash Call is one of the methods of two-factor authentication and authorisation on a website or mobile application. It is considered highly secure, so it is widely used in the banking industry. It has several variations:
- Call authentication by entering the last digits of the calling number
- The user, intending to authorise on a website or application, enters a login and password (this is the first authentication factor).
- To confirm the identity of the user in the service where the user is trying to authorise, the system initiates a call to the user’s mobile number.
- The service’s interface displays a message like ‘Enter the last 4 (the number can be different) digits of the number from the incoming call’ and an input field.
- The user sees the phone number of the incoming call and enters the last 4 digits into the corresponding field (this is the second authentication factor). In case of correct entry, successful authorisation takes place.
- Call authentication by answering the call
- The user intends to authorise on a website or in an application and enters a login and password (this is the first authentication factor).
- To confirm the user’s identity, the service initiates a call to the user’s mobile number.
- The user answers the call, where the robot offers to confirm the user’s identity by pressing the number 1 (there may be other options).
- When the corresponding action is performed, a successful authorisation takes place.