White hat hacker

White hat hacker-

White hat hacker are the person who hack the system to find the security vulnerabilities  of a system and notify to organisation so that a preventive action can be taken to protect the system from the outside hacker.White hat hacker may be paid employ of an organisation who is employed to find the security loops and hole or may be a freelancer who just want to prove his mental in this field . They has popular known as ethical hacker