Why does the HSBC Secure Key have blue squares around the 1 and 3?

The blue squares around the 1 and 3 on the HSBC Secure Key indicate specific numbers that are part of a security feature designed to enhance user authentication. These highlighted numbers are typically used in conjunction with a PIN or passWord to generate a unique code for secure transactions. This visual cue helps users quickly identify which numbers to input for added security, reducing the likelihood of error during the authentication process.