are computer security experts who specialize in penetration testing and other testing methods to ensure that a company’s information systems are secure.

White hats are computer security experts who specialize in penetration testing and other testing methods to ensure that a company’s information systems are secure.

Explanation:

White hats, also called ethical hackers, are experts in the field of information technology, dealing with the security of computer systems. They are hackers who attempt to damage, alter, conceal, or otherwise render a computer program unusable in order to help program owners become aware of the security of their data and security vulnerabilities.  

While checking the security of computer systems, ethical hackers use the same techniques and methods as potential attackers, but unlike them, they do not use the information they discover during an attack, but assess the security of the system and report the owner on the leaks detected. Ethical hackers then advise owners what they need to change to make the system safer.