EC-Council, Certified Ethical Hacker (CEH)

This is one of the few very popular certifications in the cybersecurity community from the past decade or so. I never see any decline in enthusiasm from professionals who want to start in cybersecurity or just want to understand the attacker's perspective behind any security breaches and attacks. This certification is offered by EC-Council, they also offer a range of other certifications for security professionals. This certification focuses on the "White Hat Hacker"—a concept that defines how you can use the same techniques as the bad guys to proactively find and prevent attacks. It teaches you how to think like an attacker, and learn how actual attacks are carried out and using what means. This certification also exposes you to the knowledge of hacking practices, such as foot-printing, reconnaissance, scanning...