In the past, tools often labeled as "Router Keygen" or "Infinitum Keygen" became popular because:

: If you are a Telmex user, the best way to protect yourself from dictionary-based attacks is to change your default SSID and Wi-Fi password immediately to something unique and complex. How to Protect Your Router Disable WPS

: Research such as Scrutinizing WPA2 Password Generating Algorithms explains how manufacturers often use predictable data—like the router's MAC address or SSID —as a seed to generate default Wi-Fi passwords.